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allsm [11]
3 years ago
9

7x - 3y = 42x - 4y = 1the solution to the system of equations is _____.

Mathematics
1 answer:
Mars2501 [29]3 years ago
4 0
7x - 3y = 4
2x - 4y = 1

Multiply the first equation by 4.
Multiply the second equation by -3

28x - 12y = 16
-6x + 12y = -3

Now add the equations.

22x = 13

x = 13/22

Now substitute x = 13/22 in the first original equation and solve for y.

7 * 13/22 - 3y = 4

91/22 - 3y = 88/22

-3y = -3/22

y = 1/22

Answer: x = 13/22, y = 1/22

y = 3/22
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Erin has $45,688 in sales. If her commission rate Is 2.9% , what is the amount of her commission?
posledela

Answer:

The amount of her commission is $1,324.952

Step-by-step explanation:

1. You have the following information given in the problem above:

- Erin has $45,688 in sales.

- Erin's commission rate is 2.9% (0.029).

2. Therefore, to solve this exercise you must multiply the commission rate by her sales, as following:

(45,688)(0.029)=1,324.952 dollars


3 0
3 years ago
One ordered pair (a,b) satisfies the two equations ab^4 = 384 and a^2 b^5 = 4608. What is the value of a in this ordered pair?
Alekssandra [29.7K]

Answer: a = 3∛2

<u>Step-by-step explanation:</u>

ab⁴ = 384     --> a = 384/b⁴

Substitute a = 384/b⁴ into the second equation to solve for "b".

   a²b⁵ = 4608

\bigg(\dfrac{384}{b^4}\bigg)^2\cdot b^5=4608\\\\\\\dfrac{147,456b^5}{b^8}=4608\\\\\\\dfrac{147,456}{b^3}=4608\\\\\\\dfrac{147,456}{4608}=b^3\\\\\\32=b^3\\\\\\\sqrt[3]{32} =b\\\\\\2\sqrt[3]{4} =b

Substitute b = 2∛4 into the first equation to solve for "a".

ab⁴ = 384

a(2∛4)⁴ = 384

        a  = 384/(2∛4)⁴

        a = 24/4∛4

           = 6/∛4

           = 6(∛2)/2

           = 3∛2

5 0
3 years ago
Help me pleas due to day​
Fed [463]

Answer:

32 yards

Step-by-step explanation:

11 + 11 + 5 + 5 = 32 yards

5 0
3 years ago
How do I do this question
Cerrena [4.2K]
You take a calculator right and JUST DO IT!!!!!!!!!............JUST DO IT!!!!!!!
Dont let memes be dreams JUST DO IT!!!!1
You SAID YESTERDAY THAT YOU WOULD USE MEMES SO JUST DO IT
6 0
3 years ago
Multi step equations <br> 4-5x=29
Gemiola [76]

Answer: x = -5

Step-by-step explanation:

1) subtract 4 from both sides (-5x = 25)

2) divide -5 from both sides (x = -5)

Then you have the answer!

6 0
3 years ago
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