3 years ago

Solve the system of equations 10×+7y=99andy-×=2?

1 answer:

8 0

You can use substitution and solve y-x=2 for y which is y= x+ 2 and plug it into the y of the other equasion and you get x=5 y=7

You might be interested in

Solve for p: a = 2πpw

MaRussiya [10]

Hello there.

<span>Solve for p: a = 2πpw

</span> $\frac{a}{6.283185w
}$

4 0

3 years ago

Write an equation of the line perpendicular to the given line that contains P.

lara31 [8.8K]

Answer:

Step-by-step explanation:

perp. -5

y + 7 = -5(x - 4)

y + 7 = -5x + 20

y = -5x + 13

7 0

3 years ago

Mr rivers bought a can of paint. He used 3 / 8 of it to paint a shelf. He used 1/4 to paint a wagon. He used some to paint a bir

allsm [11]

3/8 + 2/8 = 5/8

8/8 - 1/8 = 7/8

7/8 - 5/8 = 2/8 = 1/4

he used 1/4 to paint the bird house.

8 0

4 years ago

Read 2 more answers

???? With steps please

Otrada [13]

20 cm² + 32cm² + 16 cm² = 68 cm²

100 cm²–68 cm² = 32 cm²

HOPE THIS HELPS... IF NOT I'M SO SORRY :'(

8 0

3 years ago

the campus bookshop sells exercise books and textbooks, where, the total cost of 10 exercise books and 2 textbooks is $1400.00.

vovikov84 [41]

Answer:

The price of 1 exercise book is $122.45.

Step-by-step explanation:

This question is solved using a system of equations.

I am going to say that:

x is the price of one exercise book.

y is the price of one textbook.

Total cost of 10 exercise books and 2 textbooks is $1400.00.

This means that:

$10x + 2y = 1400$

Since we want x:

$2y = 1400 - 10x$

$y = 700 - 5x$

One also finds the total cost of 3 textbooks and 30 exercise books is $3000.

This means that:

$3x + 30y = 3000$

Since $y = 700 - 5x$

$3x + 30(700 - 5x) = 3000$

$3x + 21000 - 150x = 3000$

$147x = 18000$

$x = \frac{18000}{147}$

$x = 122.45$

The price of 1 exercise book is $122.45.

4 0

3 years ago