Evaluate 7 − (−1). (1 point)
Answers
Answer:
8
Step-by-step explanation:
7 - -1
When we subtract a negative, it is like adding
7+1
8
Related Questions
21 is 71%, of what number
Answers
Answer:
29.58
Step-by-step explanation:
because 21 times 39= 29.58
Answer:
29.57746479 = N
Step-by-step explanation:
Is means equals and of means multiply
21 = 71% * N
21 = .71 N
Divide each side by .71
21/.71 = .71N/.71
29.57746479 = N
HELP IM STUCK
Directions: Answer all of the questions below, making sure to show your work. You may attach the work separately. Round to the nearest whole percent when necessary.
1. You really want to buy a new iPhone with money you received for Christmas. Last month the iPhone was priced at $999, and this month it is on sale for $699. What is the markdown between the two prices? What is the percent markdown?
2. Santa estimated that he needed to deliver 8,459 presents on Christmas night. After counting, the elves realized that Santa actually had to deliver 9,870 presents. Find the percent error.
3. In 2018, U.S. households spent an average of $1,536 during the Christmas holidays. In 2019, the average amount spent was $1,496. What is the percent change between spending in 2018 and 2019?
4. Looking at the lights on a Christmas Tree, Holly guessed that there were 228 lights on the tree. She found out later that there were actually 240 lights on the tree. Find the percent error.
5. On Christmas Day, the weatherman predicted that there would be 14 inches of snow. It ended up snowing only 9 inches on Christmas Day. What is the percent error?
6. Noel wanted to buy the video game Halo Infinite with a gift card he received for Christmas. Two months ago the price of the game was $49.99 and now the game is $65.99. What is the markup between the two prices? What is the percent markup?
7. The amount of carolers in the neighborhood Christmas caroling group was 20 last year. This year there were 28 people. What is the percent change between last year and this year?
8. You decide to buy your dad a new fishing rod for Christmas. The price of the rod was $59 with 8% sales tax. What was the amount of sales tax on the purchase? What was the total cost including sales tax?
9. Your mom wanted a new tart warmer for Christmas. You decide to buy her one from Scentsy for $20. The person who sold you the tart warmer makes 2.5% commission off your purchase. How much commission did they earn?
10. Part A: Out of Santa’s elves in his workshop, 80% finished making their toys early. If 24 elves finished working early, how many elves were in the workshop in all?
Part B: If 9 elves quit this year, what is the percent decrease in Santa’s elves?
Answers
answer for question ;
1. 39%
Answer: The answer is simply 1. 39
I calculated it :)
Please help me on this FAST!
Answers
Answer:
Input = output multiplied by 5
Step-by-step explanation:
rate of change = 5
function rule = y = 5x
plz mark brainliest :3
please answer the question in picture
Answers
Answer:
1. X=28
2. A= -36
3. B= 6/5
Step-by-step explanation:
Answer:
1. X=28
2. A= -36
3. B= 6/5
Step-by-step explanation:
Thank the guy up top
Plumber 1 charges $50 per hour plus a flat fee of $20.
Plumber 2 charges $60 an hour with no additional fee.
Complete the table and write a system of equations to represent the costs, where h is the number of hours and c is the total cost.
Answers
Answer:
H: 0, 1, 2, 3, 4, 5
plumber 1: 20, 70, 110, 160, 210, 260
plumber 2: 0, 60, 120, 180, 240, 300
plumber 1: C = 50h + 20
plumber 2: C = 60h
60h=c Or 60 x h = c
Monica tried to add 1 1/4 + 2/3 and got 1 3/7 as her answer.
1. Explain Monica’s error.
2. What is the correct answer to the problem?
NO LINKS
Answers
Step-by-step explanation:
When adding fractions of different denominators, first find the LCM of the denominators, but she ignored that.
11/4+2/3
LCM=12
(33+8)/12
41/12
EXPLANATION: sorry :(
A random sample of 100 middle schoolers were asked about their favorite sport. The following data was collected from the students.
Sport Tennis Soccer Baseball Basketball
Number of Students 12 44 17 27
Which of the following graphs correctly displays the data?
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled baseball going to a value of 17, the second bar labeled tennis going to a value of 12, the third bar labeled basketball going to a value of 27, and the fourth bar labeled soccer going to a value of 44
histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled tennis going to a value of 17, the second bar labeled soccer going to a value of 12, the third bar labeled baseball going to a value of 27, and the fourth bar labeled basketball going to a value of 44
bar graph with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled soccer going to a value of 17, the second bar labeled tennis going to a value of 12, the third bar labeled basketball going to a value of 27, and the fourth bar labeled baseball going to a value of 44
histogram with the title favorite sport and the x axis labeled sport and the y axis labeled number of students, with the first bar labeled soccer going to a value of 17, the second bar labeled tennis going to a value of 12, the third bar labeled basketball going to a value of 27, and the fourth bar labeled baseball going to a value of 44
Answers
Answer: A - first answer (about bar graph)
Step-by-step explanation:
Bar graph (not histogram) because the data isn't a frequency, just a category and numerical data.
The data matches us with the first possible answer choice, so that is correct. (The 3rd choice is also a bar graph, but the data is mixed up.)
Hope this helped!
daniel walks at a speed 4 miles per hour. His mother walks at a speed 6 miles for per hour. Daniel left the house at 1pm. He wants to go to a playground which is exactly 2 miles away from his house.
When will Daniel reach the playground?
---:---
Answers
Answer: He will arrive at 1:30
Step-by-step explanation:
A scale model of an object has a scale of 1 cm : 3 ft. The actual object is 18 feet tall. How tall is the model?/ A scale model of an object is 6 inches tall. The actual object is 324 feet tall. What is the scale factor of the model?/PLEASE HELP ME SOLVE ALL OF THESE PROBLEMS !!!!!!!!!!!!!!!!!!!!!!!!!
and please answer all of them or I will report ur answer
Answers
Answer:
108 centimeters
Step-by-step explanation:
Given that :
Scale model used for the Eiffel Tower :
2 centimeter represents 6 meters;
This means 2 centimeters on the model represents 6 meters of the Eiffel Tower.
To obtain the height of the model in centimeter :
Let the height of the model = h
h of model = actual height of tower
Actual Height of tower = 324 meters
Using cross multiplication :
2 = 6
h = 324
6 * h = 324 * 2
6h = 648
h = 648 / 6
h = 108
Hence, height of the model = 108 centimeters
Answer: 108 centimeters
Step-by-step explanation:
2 centimeters represents 6 meters;
This means 2 centimeters on the model represent 6 meters of the Eiffel Tower.
Let the height of the model = h
h of the model is = to the actual height of the tower
Actual Height of tower = 324 meters
2 = 6
h = 324
6 x h = 324 x 2
6h = 648
h = 648 divided by 6
h = 108
Rachel has given $1000 to put into a savings account. She earns 2% simple interest every month. Rachel hopes to buy a car in 8 months. Help Rachel determine whether she will have enough money if the car will cost $1500. How much money will she be short or long?
Answers
Answer:
She is short on money
Step-by-step explanation:
1000 x 2% = 20
20 x 8 = 160
1000 + 160 = 1160
She is $340 short
can you help me plsssssss
Answers
Answer:
120
Step-by-step explanation:
What inequality does this number line show?
Answers
Answer:
x>2
Step-by-step explanation:
The arrow is facing the right hand side and the point on 2 isn't shaded so it's x greater than 2
The arrow is facing right and the point on 2 is not shaded so x is greater than 2
Which list orders the numbers from least to greatest?
Negative 2.4, negative 1.5, negative 2 and one-fourth, negative 3, negative 1 and one-eighth
A number line going from negative 4 to positive 4.
Negative 1 and one-eighth, negative 1.5, negative 2 and one-fourth, negative 2.4, negative 3
Negative 3, negative 2.4, negative 2 and one-fourth, negative 1.5, negative 1 and one-eighth
Negative 3, negative 2 and one-fourth, negative 2.4, negative 1 and one-eighth, negative 1.5
Negative 1.5, negative 1 and one-eighth, negative 2.4, negative 2 and one-fourth, negative 3
Answers
Negative 3, negative 2.4, negative 1.5, negative 2 and one-fourth, negative 1 and one-eighth
Hope my answer helps you✌️
Help me please il give 20 points!
Answers
Answer: 1. a. 15 b. 11 c. 2 d. 7 e. 5.5
2. Stem: Leaf:
1 9
2 5, 9
3 3, 3, 8
4 0, 7, 9
5 4, 5
6 1, 5
7 2, 7
8 1
3. a. 13 inches b. I'm pretty sure that it is the second quarter because there is more snow. c. The first quarter because it's section is more spread out among the numbers.
Step-by-step explanation:
2. Stem:
Leaf:
9
2
5, 9
3
3, 3, 8
4
0, 7, 9
5
4, 5
6
1,5
7
2, 7
8
1
3. a. 13 inches
b. I'm pretty sure that it is
the second quarter because there is more show.
c. The first quarter because it's
section is more spread out among the numbers.
Step-by-step explanation:
A bottle of water 2/3 full. You drink 3/4 of the water. Use a model to find the portion of the bottle of water that you drink .
Answers
Answer:
3/4 out of 2/3
Step-by-step explanation:
use the product rule to find the derivative
Answers
can you write in text format
I need help im giving brainliest to who answers all
Answers
Answer:
24.32 and 30
Step-by-step explanation:
you have to cross multiply. x time 18.1 is 18.1x. multiply 136.56 by 3.2 and get 440.192. Then divide 440.192 by 18.1 and get 24.32. Do the same steps for the other problem and get 30.
Answer:
No. 3
0.18 4. 47 mph
No. 7
x = 30 other
No. 7
x = 24.32
No. 8
7
So sorry if this is confusing I tried my best not to make it confusing
Step-by-step explanation:
A project will take a total of 720 person-days to complete. If the project must be completed in 30 days, how many people must be employed? PLEASE HURRY
Answers
Answer:
192 hours per day / 8 hours per person per day = 24 people
Step-by-step explanation:
Assuming each person works for 8 hours a day, the total number of hours needed to complete the project is:
720 person-days x 8 hours = 5,760 hours
To complete the project in 30 days, the total number of hours needed per day is:
5,760 hours / 30 days = 192 hours per day
Milo can run 12 miles in 60 minutes. He needs to reduce his time by 14%. Approximately how many minutes does he have to take off his time? Round to the nearest whole number.
Answers
Answer: About 8 minutes.
Step-by-step explanation: Because you multiply 60 by 0.14 to get 14% of 60.
Jessica bought
● one bottle of water for $2
● some hot dogs for $3 each.
● She spent a total of $14.
Which equation represents Jessica’s purchase?
A)
3h - 2 = 14
B)
3h + 2 = 14
C)
2h - 3 = 14
D)
2h + 3 = 14
Answers
Answer: The answer is B.
Step-by-step explanation:
h = amount of hot dogs
c = cost of hot dogs in total
Since, you already know that she bought one bottle of water for $2, she spent $14 in total, and each hot cost $3, you want to figure out how many hot dogs she bought to find the total amount of money she spent to buy hot dogs.
3 x h = c
^ This equation says that you need to multiply the number of hot dogs times the cost of each hot dog to get the total amount she spent to buy hot dogs.
This is because it is $3 PER EACH hot dog which lets you know that 3 is were the variable (h) would go. Then you have to add 2 because she is also purchasing a bottle of water. This will equal $14
What is 9 + 10 ____________________________________________
Answers
Answer:
21
Step-by-step explanation:
LOL
Please help! this is hard for me!
Answers
Answer:
$12.31
Step-by-step explanation:
Think of the original rate of pay as being 100%.
If your rate is increasing by 7%, it will now be 107% of the original rate (since 100% + 7% = 107%)
To find 107% of $11.50, convert 107% into a decimal
⇒ 107% = 107/100 = 1.07
then multiply this by the original rate to get the new increased rate:
⇒ $11.50 × 1.07 = $12.305
Rounding this to the nearest hundred = $12.31
Alternatively, you can find 7% of $11.50 and then add this to $11.50.
⇒ 7% = 7/100 = 0.07
Therefore, 7% of $11.50 = 0.07 × $11.50 = $0.805
Add this to the original rate:
$11.50 + $0.805 = $12.305
Rounding this to the nearest hundred = $12.31
Consider the situations in the table below
Situation A: A hang glider descended 33.57 feet, and then ascended 14.98 feet.
Situation B: A football team gained 7 2/5 yards in one play, and then lost 3/5 of a yard in the next play.
Situation C: A hiker walked 3 1/6 miles yesterday and 2 1/2 miles today.
Situation D: A worker earned $23.66 Monday and spent $15.84 Tuesday.
Calculate the sum of each situation. Order the situations from least to greatest based on the numeric value of the sums.
Answers
Answer:
Step-by-step explanation:Situation A: The hang glider descended 33.57 feet and again ascended 14.98. So 33.57 - 14.98 = 18.58. So now the hang glider is at 18.58 feet
Situation B: Initially they gained 7 2/5 yards and then lost 3/5 yards.
7 2/5 yards can be written as 37/5. As they lost 3/5 yards, 37/5 - 3/5 = 34/5. So the remaining yards are 34/5 yards.
Situation C: Hiker walked 3 1/6 miles and then 2 1/2 miles. So the total distance is 3 1/6 + 2 1/2 = 5 4/6 miles.
Situation D: Total amount earned is $23.66 + $15.84 = $39.5.
Answer:
Step-by-step explanation:Situation A: The hang glider descended 33.57 feet and again ascended 14.98. So 33.57 - 14.98 = 18.58. So now the hang glider is at 18.58 feet
Situation B: Initially they gained 7 2/5 yards and then lost 3/5 yards.
7 2/5 yards can be written as 37/5. As they lost 3/5 yards, 37/5 - 3/5 = 34/5. So the remaining yards are 34/5 yards.
Situation C: Hiker walked 3 1/6 miles and then 2 1/2 miles. So the total distance is 3 1/6 + 2 1/2 = 5 4/6 miles.
Situation D: Total amount earned is $23.66 + $15.84 = $39.5.
Step-by-step explanation:
PLS HELP
Which statement about a function is not true?
A. Each input has exactly one output.
B. The input value is substituted in for the variable.
C. The output value is determined by the input value.
D. The input value can always be any number.
QUESTION #2
USE THE (file / picture) TO ANSWER THIS QUESTION
Answers
Answer:
D
Step-by-step explanation:
Kenny bought a 50-pound bag of chicken feed for $29.98 and a 25-pound bag for $15.49. Can you use proportional reasoning to find the price of a 40-pound bag? Explain.
Yes; The ratio of pounds to cost is equivalent.
Yes; The unit rates are the same.
Yes; The line containing these two points passes through the origin.
No; There is no constant of proportionality.
Answers
Answer:
No; There is no constant of proportionality.
Step-by-step explanation:
29.98 divided by 50 is 0.5996 and 15.49 divided by 25 is 0.6196. They are not proportional nor are they equal. There is a difference of 0.02.
The volume of a cone is 80π cubic units. The radius of this cone is tripled.
Eric says the new volume will be tripled. It is 240π cubic units.
Natalie says the new volume will be multiplied by 9. It is 720π cubic units.
Who is correct? Explain your reasoning.
Answers
V = (1/3)πr^2h
Where V is the volume, r is the radius, and h is the height. If the radius of a cone is tripled, the volume of the cone will be multiplied by 9. This is because the radius is squared in the formula, so tripling the radius is the same as multiplying it by 3*3=9.
To see this more clearly, consider the following example:
Suppose the radius of a cone is 2 units and the height is 4 units. The volume of the cone is:
V = (1/3)π(2^2)(4) = (1/3)π(4)(4) = (1/3)π(16) = 16π/3 cubic units
If we triple the radius of the cone to 6 units, the volume of the cone becomes:
V = (1/3)π(6^2)(4) = (1/3)π(36)(4) = (1/3)π(144) = 144π/3 cubic units
The volume of the cone has been multiplied by 9.
Please brainliest if you’re satisfied
24-3x=8-2x+16-x
Tell whether it has one solution, an infinite number of solutions, or no solutions, and identify the equation as an identity, a contradiction, or neither.
Give step by step explanation
Answers
Answer:
All Real Numbers
Step-by-step explanation:
Step 1:
24 - 3x = 8 - 2x + 16 - x Equation
Step 2:
24 - 3x = - 3x + 24 Add and Subtract
Step 3:
24 = 24 Add 3x on both sides
Answer:
All Real Numbers
Hope This Helps :)
Answer:
The equation has infinite solutions. It is an identity
Step-by-step explanation:
24-3x=8-2x+16-x
Combine like terms
-3x +24 = -2x -x +8 + 16
-3x +24 = -3x + 24
At this point it is evident that the equation is an identity.
Any real number substituted for x will result in a true equation.
Which figure has exactly one line of symmetry? A rhombus, pentagon, rectangle and triangle are shown. A. Rhombus B. Pentagon C. Rectangle D. Triangle
Answers
Answer: The figure that has exactly one line of symmetry is B. Pentagon.
Step-by-step explanation: A line of symmetry is a line that divides a figure into two congruent halves that are mirror images of each other. A figure can have zero, one, or more lines of symmetry depending on its shape and orientation. To find the lines of symmetry of a figure, we can use a paper folding method or a reflection test. A paper folding method involves folding the figure along a line and checking if the two halves match up exactly. A reflection test involves reflecting the figure over a line and checking if the image coincides with the original figure.
Using either method, we can see that:
A. Rhombus has two lines of symmetry: one diagonal and one vertical.
C. Rectangle has two lines of symmetry: one horizontal and one vertical.
D. Triangle has either zero or three lines of symmetry depending on the type of triangle. An equilateral triangle has three lines of symmetry: one vertical and two bisecting the angles. An isosceles triangle has one line of symmetry: the perpendicular bisector of the base. A scalene triangle has no lines of symmetry.
B. Pentagon has either zero or five lines of symmetry depending on the type of pentagon. A regular pentagon has five lines of symmetry: each passing through a vertex and the midpoint of the opposite side. An irregular pentagon has no lines of symmetry.
Therefore, the only figure that has exactly one line of symmetry is B. Pentagon, but only if it is an isosceles pentagon.
Hope this helps, and have a great day! =)
Keira said that if 6 tickets are sold, there should be 2 tickets left. Is Keira correct?
Answers
According to Keira, if 6 tickets are sold, there should be 2 tickets left. However, we don't have any information about the initial number of tickets available.
If the total number of tickets initially was 8, and 6 tickets were sold, then there would indeed be 2 tickets left, supporting Keira's statement.
However, if the total number of tickets initially was less than 8, or if the statement doesn't specify the initial number of tickets, we cannot determine if Keira's statement is correct.
Therefore, without additional information, we cannot determine the accuracy of Keira's statement.
Use order of operations to choose all of the expressions that are correctly solved.
(8 + 7) ÷ 3 = 5
(4 × 5) − 3 = 8
(4 × 5) − 3 = 17
14 − 7 × 2 = 0
14 − 7 × 2 = 14
12 + (7 + 9) = 28
Answers
2.) no
3.) yes
4.) yes
5.) yes
Answer:
1. correct
2. not correct
3.correct
4.correct
5. not correct
6. correct
Step-by-step explanation:
P(parenthesis) E(exponents) M(multiplication) D(division) A(addition) S(subtraction)
You first solve what is in the parenthesis (if there is any) than make your way down this list IN ORDER until you hit subtraction.
1.
\((8+7)/3=5\\\\(15)/3=5\\5=5\)
2.
(4 × 5) − 3 = 8
Parenthesis first
(20)-3=8
subtract
17=8
3.
(4 × 5) − 3 = 17
Do what is in parenthesis first
(20)-3=17
subtract
17=17
4.
14 − 7 × 2 = 0
Multiply 7*2 first
14-14=0
subtract
0=0
5.
14 − 7 × 2 = 14
Multiply 7*2 first
14-14=14
subtract
0=14
6.
12 + (7 + 9) = 28
Parenthesis first
12+(16)=28
Add
28=28