Solve this system of linear equations. Separate
the x- and y-values with a comma.
-5x + 3y = 13
7x + 2y = -12
Answers
Answer:
x = -2, y = 1
Step-by-step explanation:
So you can solve this equation using subtraction.
Multiply the first equation by 2:
-10x + 6y = 26
Multiply the second equation by 3:
21x + 6y = -36
Subtract the two equations:
-31x = 62
x = -2
y = 1
Related Questions
Mai says that the equation 2x + 2 = x + 1 has no solution because the left-hand side is double the right hand side.
a) Is the left hand side double the right hand side?
b) Is Mai correct, does the equation have no solution? Explain your reasoning.
Answers
Answer:
h im billy
Step-by-step explanation:
Answer:
no Mai is not correct.
Step-by-step explanation:
PLEASE HURRY AND FAST Raul's soccer team enters a tournament. He estimates that
his team has a 50% chance of winning each of the three
games they play. If they win all three games, they move to
the championship. To model his team's chance of going to
the championship, Raul performs a simulation using a
coin.
Let heads (H) represent a win.
• Let tails (T) represent a loss.
The results of the simulation were:
HTH HHH TTT HTT HHT
TTT HTT HTT HTT HHH
НHТ HTT ТTТ TTT HTH
Answers
Answer:
A. There were NOT 3 successes . there were only two.
Step-by-step explanation:
Answer: there were only two success
Is -4/5 rational or irrational
Answers
Answer: Rational
Step-by-step explanation:
The number -0.8 is rational if it is an integer or decimal
A rational number is a number that can be represented as a/b where a and b are integers and b is not equal to 0.
Since -0.8 is an integer or decimal from above, -0.8 is also a rational
An irrational number is a number that cannot be expressed as a ratio between two integers and is not an imaginary number.
Answer:
It is a rational number
Step-by-step explanation:
An irrational is a number that repeats in a sequence or not.
It is a number that never stops. ex. pi, 2/3.
-4 divided by 5 is -0.8 which is a rational number
z = 15/4 How to solve this? (full explanation please)
Answers
When ever you have a question like that you just divide the numerator (top) by the denominator (bottom)
HELP PLS what would be
-8(4-x)+20 as the sum of two unlike terms
Answers
Answer: Hope this helps (maybe brainliest?)
-8(4-x)+20
-32+8x+20
8x-12
Sue ran 7 miles more than Jill last week. Sue ran 11 miles. Which equation will tell you how many miles Jill ran?
Responses
A x − 7 = −11
B x − 7 = 11
C x + 7 = 11
D x + 7 = −11
Answers
Select all ratios equivalent to 12:8 A. 15:10 B. 27:12 C. 14:2
Answers
Answer:
(12/8 = 1.5)
A) 15:10
PLEASE HELP I DO NOT KNOW WHAT THIS IS
Answers
Answer:
32 is the answer!!
marknem brainliest
I have 60% on my iPad and my brother has 90% on his how much more percentage I need as a fraction.
Answers
Answer:
1/3
Step-by-step explanation:
just convert it?
3/10
Step-by-step explanation:
60% is the same as 60/100
90% is the same as 90/100
90-60=30
30/100
30/100 is divided by 10 on each side to simplify it to 3/10
The net of a prism is made up of 2 rectangles. Rectangle 1 has a base of 9 feet and height of 3 feet. Rectangle 2 has a base of 7 feet and height of 5 feet.
What is the surface area of the prism?
29 ft2
30 ft2
58 ft2
62 ft
Answers
Answer:
62 ft2
Step-by-step explanation:
you multiply 9 and 3
then you multiply 7 and 5
after you do that you and those two answers together
Arwa is playing 'Guess my number'. Arwa says: 'If I add 0.4 to my number, divide the answer by 8, then multiply that answer by 9, I get 0.9.' What is Arwa's number?
Answers
meaning, if you divide 0.9 by 9, you get 0.1. when you multiply 0.1 and 8 you get 0.8. and when you subtract 0.4 from 0.8 you get your answer, 0.4.
solve the following proportion
x/2 = 8/9
Answers
Answer:
\(\huge\boxed{\sf x = 16/9}\)
Step-by-step explanation:
Given proportion:\(\displaystyle \frac{x}{2} =\frac{8}{9} \\\\Cross \ Multiply\\\\x \times 9=2\times 8\\\\9x = 16\\\\Divide \ 9 \ to \ both \ sides\\\\x = 16/9\\\\\rule[225]{225}{2}\)
Cross multiply
2x8
=16
Xx9
=9x
Divide both sides by 9
=16/9
For each ride, a taxi service charges an initial fee plus an additional fee based on the number of kilometers of the trip. The graph shows the cost for taxi rides. Select a true statement. The rise is 4 while the run is 2. The selection of answers are:
A: The slope is 2.1. This means that each kilometer costs $2.10.
B: The slope is 5. This means that each kilometer costs $5.
C: The y-intercept is 2.1. This means that the initial fee is $2.10.
D: The y-intercept is 5. This means that the ride lasts 5. kilometers.
Which one is right and why?
Answers
THIS MIGHT NOT BE WHAT YOU ARE LOOKING FOR AND MIGHT NOT BE CORRECT! READ FIRST!
The answer is A. The slope of the line is rise/run = 4/2 = 2.1. This means that each kilometer costs $2.10. The y-intercept is 2.1, which means that the initial fee is $2.10. So the correct statement is: The slope is 2.1. This means that each kilometer costs $2.10.
The other statements are incorrect. The slope is not 5, so each kilometer does not cost $5. The y-intercept is not 5, so the ride does not last 5 kilometers. The y-intercept is the value of the function when the input is 0, which in this case is the initial fee of $2.10.
Evaluate the expression of 1 + |9 + 2|
Answers
Answer: 12
Step-by-step explanation:
1 + |9 + 2|
1+ 11 = 12
Answer:
12
Step-by-step explanation:
\(1+|9+2|\\1+|11|\\1+11\\12\)
15 points to whoever answers this!!
Answers
Answer:
\(\frac{16}{27}\)
Step-by-step explanation:
From the table, we notice that the total number of students is:
\(3+10+8+6=27\)
Then, along the second column of the table, we notice that the number of students who do not have a brother is:
\(10+6=16\)
So, the probability that a randomly chosen student does not have a brother is:
\(\frac{\text{number of students who do not have a brother}}{\text{total number of students}}=\frac{16}{27}\)
Having trouble please help (+20 points!)
Answers
Answer:The total area for the parallelogram-shaped tiles Felix needs to buy exists 80cm² at the price of $40.
Step-by-step explanation:
What is meant by the area of parallelogram?
In calculating the area of a parallelogram, the base exists multiplied by the height, in an exact way as computing the area of a rectangle.
Given that, the base of one parallelogram-shaped tile exists 4cm with a height of 2 cm.
Area of one parallelogram shaped tile = 4cm × 2cm
Area of one parallelogram-shaped tile = 8cm²
Total area for the 5black and 5white tiles = 10 × 8cm²
Total area for the 5black and 5white tiles = 80cm²
Therefore, Felix must buy a total area of 80cm² of 10 parallelogram-shaped tiles.
I need help with this topic, an explanation of how you got the answer would be very much appreciated, Thanks :)
( I attached pictures )
Answers
Answer:
No Solutions
Step-by-step explanation:
Hello!
We can approach this system using the Elimination method. Since the coefficients of the the x terms are the same, we should vertically subtract the two equations.
Subtract\(\left \{ {{y=9x - 5} \atop {y = 9x + 6}} \right.\)\(-\left \{ {{y=9x - 5} \atop {y = 9x + 6}} \right.\)\(-\left \{ {{y=9x - 5} \atop {y = 9x + 6}} \right.\\0 = 0 -1 1\)\(0 \neq -11\)Since 0 does not equal to -11, there are no solutions to the system.
We can also look at this graphically. The two lines have the same slope but different y-intercepts, meaning that they would be parallel lines with no intersection. If there is no intersection, there are no solutions.
Please help me I'm desperate
Answers
Answer: 0.26375
Step-by-step explanation:
26.375% = 0.26375
Percent -> decimal is dividing the percent by 100
Which expression is equivalent to 2(y+4) + 3(x+2x)
A. 2y + 8 + 9x
B. 2y + 4 + 9x
C: 2y + 4 + 5x
D: 2y + 8 + 5x
Answers
Explanation:
2 × Y = 2Y
2 × 4 = 8
Simplified: 2Y+8
3 × X = 3X
3 × 2X= 6X
Simplified: 9X
Equation: 2Y + 8 + 9 X
Please help me answer.
Answers
Answer: First blank is 15 then 28 then 25 in the last blank.
Step-by-step explanation:
On the left side column it is going up by 5 and the right column is going up by 7.
And second column is 7,14,21,28,35
Explain the cosine rule and sine rule while also saying how to use it and provide examples (keep it in simple terms)
Answers
Answer:
Sure, I'll explain the cosine rule and sine rule in simple terms:
The cosine rule (also known as the law of cosines) is used to find the length of a side or the measure of an angle in a triangle given the lengths of the other sides and the angle between those sides. It states that c^2 = a^2 + b^2 - 2ab cos(C), where c is the length of the side opposite angle C, and a and b are the lengths of the other two sides.
Here's an example of how to use the cosine
Suppose we have a triangle with sides a=6, b=8, and an angle between them c=45 degrees. We want to find the length of the remaining side of the triangle, side a.
Using the cosine rule:
a^2 = b^2 + c^2 - 2bc * cosA
where A is the angle opposite side a, we can plug in our values and solve for a:
a^2 = 8^2 + 6^2 - 2(8)(6) * cos(45)
a^2 = 64 + 36 - 96 * 0.707
a^2 = 10.56
a = sqrt(10.56)
a = 3.25 (rounded to two decimal places)
Therefore, the length of side a is approximately 3.25 units.
Answer:
Step-by-step explanation:
What is the value of x in the equation?
1.5x - 15.5 = 2.5
Group of answer choices
12
2
15
1
Answers
Answer:
12
Step-by-step explanation:
1.5x - 15.5 = 2.5
We can add 15.5 on both sides so that we get the x onto one side. We then get: 1.5x=18
To get x we dive 18 by 1.5 which is 12.
Help please, due tomorrow
Answers
Answer:
The missing top number is 48 and the bottom numbers are 1, 2, 4, 5
Step-by-step explanation:
2 x 24 = 48
96/24 is 4
120/24 = 5
The top row (Inches on airplane) is multiplying the number below it by 4
You end up getting
24,48,96,120
1,2,4,5
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.
What is the slope of the line given the two points: (-4, -4) (-1, 14)
Answers
Answer:
6
Step-by-step explanation:
Do rise over run (change in y over change in x)
\(\frac{18}{3}\) = 6
The slope is 6
PLEASE HELP ME!!! I NEED THIS ASAP!!!!!
Answers
Answer:
It is proved because line segment AC and line segment BD are parallel.
Step-by-step explanation:
I am also trying my best. Please let me know if it’s wrong or you need more help. Have a great day!
For breakfast, Mr hill bought a cup of coffee for 1.39 and a bagel for 1.85. How much change will he get for 5.00
Answers
Hence, the change he get is $\(1.76\).
What is the equation?
The definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.
Here given that,
For breakfast, Mr hill bought a cup of coffee for \(1.39\) and a bagel for \(1.85\).
So, the total he bought is \(1.39+1.85=3.24\)
He has the savings \(5.00\)
So, it would be
\(5.00-3.14=1.76\)
Hence, the change he get is $\(1.76\).
To know more about the equation
https://brainly.com/question/12788590
#SPJ2
Question is there ⬇️⬇️⬇️⬇️⬇️⬇️⬇️
Answers
Answer:
4.9
Step-by-step explanation:
for this I used the sine rule so I did 6/sin 70 × sin 50
Joe has 7 shirts, 4 pairs of pants and 2 pairs of shoes. He needs to make an outfit containing one of each
item. How many different outfits are possible? (We assume that one different item makes a different outfit)
a
13 outfits
28 outfits
26 outfits
56 outfits
d
Answers
Joe has 56 possible different outfits.
What are combinations?A combination is a mathematical method in which the number of possible ways in which a set of given items can be chosen, such that the order in which it happens does not matter items.
The number of possible outfits can be chosen as shown below:Joe has 7 different choices for shirts.
Joe has 4 different choices for pants.
Joe has 2 different choices for shoes.
This means that number of combinations in which Joe can choose an outfit can be found by multiplying all the choices.
This can be done as shown below:
Number of choices for shirts * Number of choices for pants * Number of choices for shoes
= 7 * 4 * 2
= 56 combinations.
Therefore, we have found that Joe has 56 possible different outfits. The correct answer is option D.
Learn more about combinations here: https://brainly.com/question/11732255
#SPJ2
24 %
89.5 %
10.5 %
76 %
Answers
Answer:
A
Step-by-step explanation:
I believe the answer is A. Good luck on your test!
Answer:
89.5 %
Step-by-step explanation: