Ask question

Ask question

All categories

olga nikolaevna [1]

3 years ago

15

If 3y+5=7x, then 21y-49x=?

1 answer:

FromTheMoon [43]3 years ago

3 0

3y+5=7x

3y=7x-5

y=(7x-5)/3

...

21y-49x becomes

7(7x-5)-49x

49x-35-49x

-35

You might be interested in

Mai invested $7000 in a money-market fund that paid 6.2% simple interest . What was the value of her account at the end of 18 mo

boyakko [2]

Depends it could be 14812 if they want total value or just the interest would be 7812

5 0

3 years ago

Read 2 more answers

Choose the right answer.

Pavel [41]

Step-by-step explanation: last year

3 0

3 years ago

Read 2 more answers

Find the slope of 9x=3y+5

qaws [65]

<u>9x</u> = <u>3y + 5</u>
9 9
x = 1/3y + 5/9
x - 5/9 = 1/3y + 5/9 - 5/9
x - 5/9 = 1/3y
3(x - 5/9) = 1/3y · 3
3x - 1 2/3 = y
y = 3x - 1 2/3

4 0

3 years ago

1. Part A: Use the properties of exponents to explain why 64^1/2 is called the square root of 64.

Dmitriy789 [7]

A: When you multiply two numbers, their exponents add.
So, $64^{\frac{1}{2}} * 64^{\frac{1}{2}} = 64^{\frac{1}{2} + \frac{1}{2}} = 64^{1} = 64$

Since 64^1/2 multiplied by itself is 64, then it is the square root of 64.

B: The area is irrational. 7 * √7 is irrational.

8 0

3 years ago

Read 2 more answers

What is the difference between the solution of a linear

Snowcat [4.5K]

A system of linear inequalities in two variables consists of at least two linear inequalities in the same variables. The solution of a linear inequality is the ordered pair that is a solution to all inequalities in the system and the graph of the linear inequality is the graph of all solutions of the system.

4 0

3 years ago