-4 + 3a2 from 7a - a2
Answers
7a -a2
+3a2 -4
(7a +2a2 -4)Answer:
-4a^2+7a+4
Step-by-step explanation:
7a-a^2 --4+-3a^2
:-4a^2+7a+4
Related Questions
2A. Find the area of a parallelogram with the following measurements.
a. base = 8cm, height=14cm b. base=18cm, height=6cm
Grade#7
Answers
Answer:
a) formula of parallelogram- BASE × HEIGHT
Step-by-step explanation:
Area:-B×H
area- 8×14
area of parallelogram= 112cm²Therefore :
Area - base x height
Area- 8 x 14
= 112cm squared
Please help me, I am not good at math
Answers
Answer: 2:3
Step-by-step explanation:
According to the question the 2 given triangles are in ratio with each other.
Therefore from the figure we se that
JK= 6 units
XY= 9 units
So, JK:XY = 2:3
Therefore, the scale factor is 2:3.
Sam has a deck that is shaped like a triangle with a base of 18 feet and a height of 7 feet. He plans to build a 2:5 scaled version of the deck next to his horse's water trough.
Part A: What are the dimensions of the new deck, in feet? Show every step of your work. (4 points)
Part B: What is the area of the original deck and the new deck, in square feet? Show every step of your work. (4 points)
Part C: Compare the ratio of the areas to the scale factor. Show every step of your work. (4 points)
PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
Answer:
6
Step-by-step explanation:
18-2.5+7 there s your helllppppppppppp
New base = 18 x 2/5 = 7.2 feet
New height = 7 x 2/5 = 2.8 feet
Therefore, the dimensions of the new deck are 7.2 feet for the base and 2.8 feet for the height.
Part B: To find the area of the original deck, we can use the formula for the area of a triangle, which is:
Area = (1/2) x base x height
Area = (1/2) x 18 x 7 = 63 square feet
To find the area of the new deck, we can use the same formula and plug in the new dimensions:
Area = (1/2) x 7.2 x 2.8 = 11.88 square feet
Therefore, the area of the original deck is 63 square feet and the area of the new deck is 11.88 square feet.
Part C: The ratio of the areas is:
63/11.88 = 5.303
The scale factor is:
2/5 = 0.4
To compare the ratio of the areas to the scale factor, we can divide the ratio of the areas by the scale factor:
5.303/0.4 = 13.2575
Therefore, the ratio of the areas is 13.2575 times the scale factor.
Can some please help me?
Answers
Answer:
ofc 8374747374743i3i3i383
5. 16t^4/8t^4
9. 6^3+6+4/6^2+3+3
THE ADDITION PART IS STILL EXPONENTS
I hope that was easy to understand, here’s a guide if you need it in the future
Serious. SOLVE CORRECTLY AND SHOW WORKKKK! Explain how you got it throughly.
Answers
Step-by-step explanation
help me, please thanks
Answers
Answer: 120 feet sqaured
Step-by-step explanation:
Surface area for square pyramid formula: 2bh + b^2
Base = 6 Height = 9
2*6*9+6^2 =
108+12 =
120
Answer:
120 feet squared
Step-by-step explanation:
What is the volume, in cubic inches, of a basketball with a diameter of 9 inches?
Answers
Answer:
diameter = 9 inches
radius = 9/2inches
Now, area = pie×r.square
Step-by-step explanation:
-Credit janashampa07
Answer:
diameter = 9 inches
radius = 9/2inches
Now, area = pie×r.square
abcdefghijklmnopqrstuvwxyz
Answers
Answer:
9 people
Step-by-step explanation:
40 + 18.25x = 124 + 7.75x
18.25x - 7.75x = 124 - 40
10.5x = 84
x = 84 ÷ 10.5
x = 8 people to EQUAL the same price as trampoline
Question is how many people must be invited to cost MORE, not the same.
If 8 equals, then anything above is more
Since there is no such thing as half a person, the answer is 9 people
A little help here? And can anyone explain this?
Answers
Answer:
D.
Step-by-step explanation:
According to the dot plot,
3 students spend 0.5 minutes brushing their teeth.
2 students spend 1.5 minutes brushing their teeth.
1 student spends 2.5 minutes brushing their teeth.
2 students spend 3.5 minutes brushing their teeth.
1 students spend 4 minutes brushing their teeth.
So, the number set will be: {0.5, 0.5, 0.5, 1.5, 1.5, 2.5, 3.5, 3.5, 4}
Median: The middle number in a set that is ordered from least to greatest.
In this example, the median is 1.5
Mean: The sum of all values divided by the number of values.
In this set there are 9 values so we’ll divide the sum by 9
In this example, the mean would be:
(0.5 + 0.5 + 0.5 + 1.5 + 1.5 + 2.5 + 3.5 + 3.5 + 4) ÷ 9
18 ÷ 9 = 2
If we compare the mean to the median we can see that the mean is greater because 2 > 1.5
ill mark brainiest if right
Answers
Answer:
43 1/3
Step-by-step explanation:
Answer:
43 1/3
Step-by-step explanation:
What is an algebric expression that equals 32 more than a number
Answers
Answer:
x+32
Step-by-step explanation:
Answer:
x+32
Step-by-step explanation:
x is the unknown variable
Help please. I need 5 percent in khan
Answers
Answer: 1
Identify the point on the axis where x = -9, and find the correlating portion of the function above or below that axis. In this case, the function is equal to 1 when x is equal to -9.
Answer:
y= 1
Step-by-step explanation:
You simply need to look at the graph. When we look at the x-axis and look at -9, the line graphed (y-axis) is at 1. So point (-9,1) shows us our answer!
Look at my image below for more help!
Hope it helps!
I know this question is not about math or science but my friends are saying the Leonardo DiCaprio when he was young is hotter than Zac Efron now and when he was young. I need y’alls opinions.
Who is hotter, young Leonardo DiCaprio or 35 year old Zac Efron? My pick is Zac Efron but I want some opinions.
Answers
Answer:
it's Zac Efron for sure, Leonardo DiCaprio is just not the same...
Light travels from the sun at 1.12 x 107 miles per minute. The planet, Mars, is approximately 1.42 x 108 miles away from the sun.
What is the approximate amount of time, in minutes, for light to travel from the Sun to Mars? Write your answer in scientific notation rounded to the nearest hundredth.
Answers
Answer:
Time = 1.27 x 10^1 minutes
Step-by-step explanation:
To calculate the approximate amount of time it takes for light to travel from the Sun to Mars, we can divide the distance between them by the speed of light.
Given:
Speed of light = 1.12 x 10^7 miles per minute
Distance between the Sun and Mars = 1.42 x 10^8 miles
Time = Distance / Speed
Time = (1.42 x 10^8 miles) / (1.12 x 10^7 miles per minute)
Time = (1.42 / 1.12) x 10^(8 - 7) minutes
Time = 1.27 x 10^1 minutes
Rounded to the nearest hundredth, the approximate amount of time for light to travel from the Sun to Mars is 12.70 minutes in scientific notation.
Time = Distance / Speed
Given:
Speed of light = 1.12 x 10^7 miles per minute
Distance from the Sun to Mars = 1.42 x 10^8 miles
Time = (1.42 x 10^8 miles) / (1.12 x 10^7 miles per minute)
To simplify the calculation, we can divide the numerical values and subtract the exponents:
Time = 1.42 / 1.12 x 10^(8 - 7) minutes
Time = 1.27 x 10^1 minutes
Rounding to the nearest hundredth, the approximate amount of time for light to travel from the Sun to Mars is 12.7 minutes in scientific notation.
Hey brainly users can you help me out these questions thanks also its due today in like 1 hour!!!
The distance between point A and point B is 5.3. Give possible values for A and B in each situation
1.A and B are both positive numbers.
2. Either A or B is negative.
3.Both A and B are negative.
A.How are parts (a) and (c) similar to each other? How are they different from part (b)?
B.How is your strategy for part b different from parts (a) and (c)?
C. Point A is located at -4, and point B is 3 units from point A. Write two absolute value equation that could be used to determine the location of point B. Model this on the number line below.
Answers
Answer:
I was gonna answer but its past an hour sorry
Step-by-step explanation:
Marlo buys
6
66 feet of ribbon to make bracelets. She needs
18
1818 inches of ribbon to make
1
11 bracelet.
How many bracelets can Marlo make if she uses all the ribbon she buys?
Answers
Answer:
So, 6 feet is equal to 72 inches. You need 18 inches for one bracelet, so by dividing 72/18, you get 4. So, he can make 4 bracelets.
Answer:
So, 6 feet is equal to 72 inches. You need 18 inches for one bracelet, so by dividing 72/18, you get 4. So, he can make 4 bracelets.
Step-by-step explanation:
please help 20 Pts...
Answers
Answer:
2
1–
2
Step-by-step explanation:
its my answer i don't know if my answer is right
6 centimeters is the same as how many inches?
Hint: 1cm≈0.39in
Round your answer to the nearest tenth.
Answers
Answer:
2.4
Step-by-step explanation:
0.39 x 6
2.34
2.4 (rounded)
Since every 1cm is equal to 0.39in, it is shown to convert 6cm to in, in order to do that, you multiply 0.39 by 6cm.
therefore, 0.39x6=?
?= 2.34
ANSWER:
2.34
support me by marking as brainliest!! :)
*****100 POINTS****** please help me with this area of a circle question.
Answers
Answer: 12 cm
Step-by-step explanation: In order to do this, you have to know that the formula for the area of a circle is pir^2. Pi times the radius squared is equal to 36 pi. Well, 6 squared is 36, and 36 times pi is 36 pi. So that means that the radius is 6. Then, the radius is half the diameter, so the diameter is 12.
(HELP PLEASEE SOMEONE I'LL GIVE BRAINLIESTT if correct) If b/a=c/b=d/c=2/3, find the value of a:b:c:d
Answers
Answer:
3:3:2:3
Step-by-step explanation:
b/a = 2/3 = b is 2 a is 3
c/b = 2/3 = c is 2 b is 3
d/c=2/3 = d is 2 c is 3
All you have to do to solve this question is to lay out all the variables and see which number matches with which.
Answer:
might be c
Step-by-step explanation:
a − b/c − d = 2 and a − c/b − d = 3 will hold for any values of a, b, c and d as long as
b≠0; c≠0
b/c − c/b = 1
and
a − d = 2 + b/c
If you let x = b/c, b/c − c/b = 1 becomes x − 1/x = 1
⇒ x2 − x − 1 = 0
⇒ x = 1.618 or x =−0.618.
So
b/c = 1.618 or b/c =−0.618 is required.
The values of a, b, c and d are arbitrary subjected to
b/c = 1.618 or b/c =−0.618 and a − d = 2 + b/c.
Let c and d be the free variables, and let x = d/c then
a − d/b − c = (1 − c/b)x + 2 + c/b
I’m studying for a test, could you help me with A, B, and C? (image below)
Answers
Answer:
a = 51
b = 51 (??not so sure)
c = 20 cents
Step-by-step explanation:
a) 25 x 408 = 10200
10200 ÷ 200 = 51 square ft is one one roll.
b) the surface area of an average gift is 51 sq ft (?)
c) 40 ÷ 200 = 0.2
each roll costs $40 dollars. each roll can wrap 200 gifts so 40 ÷ 200 = $0.20/ 20 cents
If the cones radius is r, what is its height? I’m looking for a formula written as an expression. Thank you!
[I believe the equation would be something like h = 3 x V/(pi x r^2])
Answers
Answer:
The height is H
Step-by-step explanation:
The formula is : V = (1/3) π r 2 h
Answer:
The equation to find the height of a cone is:-
V = 1/3 π r^2 * h
You will put all the given values and then simplify them to measure the heaight of the cone.
IF MY ANSWER IS HELPFUL THEN PLEASE RATE IT, LIKE IT, FOLLOW ME AND GIVE ME A BRAINLIEST....PLEASE.
Look at the multiplication problem shown below.
328x24
What is the product?
A.
1,968
B.
7,742
C.
7,852
D.
7,872
Answers
Step-by-step explanation:
d or 7,872................
Answer:
d
Step-by-step explanation:
multiply the numbers together and get your answer
easy multiple choice question
Answers
Answer:
B
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
A function f(x) has an inverse, or is one-to-one, if and only if the graph y = f(x) passes the horizontal line test. A graph represents a one-to-one function if and only if it passes both the vertical and the horizontal line tests.
GIVING ALL MY POINTS! GIVING BRAINLIEST! I have a plagiarism checker-
Please answer the following essay question:
Explain why we need to have a common denominator in order to add or subtract fractions.
Answer in paragraph form using complete sentences and include any calculations, graphs, and labeled diagrams as appropriate.
Answers
Which of the following tables represents a linear relationship that is also proportional?
A:
x y
0 2
4 4
8 6
B:
x y
0 0
2 1
4 2
C:
x y
0 1
5 3
10 5
D:
x y
0 3
3 7
6 11
Answers
Answer: A
Step-by-step explanation: you cross multiply
help-
(please, ill mark brainliest)
Answers
Answer:
a
Step-by-step explanation:
Which table of ordered pairs represents A 2-column table with 3 rows. Column 1 is labeled x with entries negative 2, negative 4, negative 6. Column 2 is labeled y with entries 4, 16, 36.
A 2-column table with 3 rows. Column 1 is labeled x with entries negative 4, negative 6, negative 8. Column 2 is labeled y with entries negative 8, negative 12, negative 18.
A 2-column table with 3 rows. Column 1 is labeled x with entries negative 3, negative 5, negative 7. Column 2 is labeled y with entries 5, 3, 1.
A 2-column table with 3 rows. Column 1 is labeled x with entries negative 3, negative 6, negative 9. Column 2 is labeled y with entries 12, 24, 36.a proportional relationship?
Answers
Answer:
Step-by-step explanation:
negative 18.
A 2-column table with 3 rows. Column 1 is labeled x with entries negative 3, negative 5, negative 7. Column 2 is labeled y with entries 5, 3, 1.
Josh is trying to factor the expression -20a - 8.4 + 12.8b. He writes -4(5a + 2.1 + 3.2b).
a. What error did Josh likely make?
b. Factor the expression correctly.
c. Write an equivalent factored expression
Answers
Answer: =)
Step-by-step explanation:
a. The error Josh made in the problem is that he used a +3.2b. He was supposed to use -3.2b. Why? because the expression is -20a -8.4 + 12.8b, and he used -4 to make the equivalent factored expression. when you multiply +3.2 and a -4, the answer will turn out to be a negative number.
b. -20a -8.4 + 12.8b
c. The correct equivalent factored expression would be -4(5a + 2.1 -3.2b)
a. The error Josh makes is that he puts +3.2b when it’s supposed to be -3.2b because 12.8/-4 is -3.2b
b. -4(5a + 2.1 - 3.2)
c. -20a + 4.4
Some students recorded how many minutes they spent on the phone in one day. They put the results in a Stem-and-Leaf Plot.
What is the mean number of minutes spent on the phone?
Answers
Explanation:
The data from the stem-and-leaf plot is:
10,
24,25,26,
30,30,32,33,
40,45,46
Add up those values
10+24+25+26+30+30+32+33+40+45+46 = 341
Then divide over n = 11 which is the sample size.
341/11 = 31 is the arithmetic mean.
Answer:
341/11 = 31 is the arithmetic mean.
Step-by-step explanation: