2 years ago

Solve each system by substitution. y=-4x-9 y=3x+19

Mathematics

1 answer:

Alekssandra [29.7K]2 years ago

5 0

Answer:

x=-4, y=7

Step-by-step explanation:

According to the first equation, y = -4x - 9, so we can substitute y in the second equation for -4x - 9.

y = 3x + 19

-4x - 9 = 3x + 19

Add 9 to both sides

-4x = 3x + 28

Subtract 3x

-7x = 28

Divide by -7

x = -4

Plugging this into the equation, we have:

y = -4x - 9

y = -4(-4) - 9

y = 16 - 9

y = 7

You might be interested in

Pregnancy length (in days) is a normally distributed random variable with a mean of 266 days and a standard deviation of 16 days

velikii [3]

Answer:

it=552

Step-by-step explanation:

with rounding it = 550

5 0

2 years ago

PLEASE HELP ME!!!!!!

Harrizon [31]

65-26
A = 200(1+(0.0275/12)^0.0275(12 x 41 ) graph this in y =

7 0

3 years ago

Samuel can type nearly 40 words per minute. Use this information to find the number of hours it would take him to type 2000 word

Sauron [17]

If he types 40 words a minute, he can type 2000 words in 50 minutes you can solve this by doing 40*50 the number of hours would be less than one

8 0

2 years ago

Solve the equation for y.<br><br> 8x – 9y = 11

SVETLANKA909090 [29]

8x-9y=11

Add 9y to both sides

8x = 11 + 9y

Subtract 11 on both sides

8x - 11 = 9y

Divide 9 on both sides

$\boxed{y = \frac{8x-11}{9} }$

5 0

3 years ago

- 100 points -

Molodets [167]

Answer:

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers