All categories

3 years ago

{x = -4y - 19

Mathematics

2 answers:

o-na [289]3 years ago

8 0

Answer:

x = 9

y = -7

Step-by-step explanation:

x = -4y - 19

2x + 2y = 4

2(-4y - 19) + 2y = 4

-8y - 38 +2y =4

-6y = 4 + 38

-6y=42

y= -7

x = -4(-7) -19

x = 9

Harman [31]3 years ago

3 0

Answer:

x = 9 and y = -7

Step-by-step explanation:

given:

x = -4y - 19
2x + 2y = 4

using substitution method:

2(-4y - 19) + 2y = 4

-8y - 38 + 2y = 4

-6y = 42

y = -7

Solve for x:

x = -4(-7) - 19

x = 28 - 19

x = 9

You might be interested in

Jimmy's backyard is rectangle that is 18 5/6 yards long and 10 2/5 yards wide Jim buy sod in pieces that are 1 1/3 yard long and

g100num [7]

Answer:

111 pieces of soda

Step-by-step explanation:

step 1

Find the area of the rectangular backyard

The area of the rectangular backyard is equal to

$A=LW$

where

$L=18\frac{5}{6}\ yd=\frac{18*6+5}{6}=\frac{113}{6}\ yd$

$W=10\frac{2}{5}\ yd=\frac{10*5+2}{5}=\frac{52}{5}\ yd$

substitute

$A=(\frac{113}{6})(\frac{52}{5})$

$A=\frac{5,876}{30}\ yd^2$

step 2

Find the area of one piece of sod

The area of the rectangular piece of sod is

$A=LW$

where

$L=1\frac{1}{3}\ yd=\frac{1*3+1}{3}=\frac{4}{3}\ yd$

$W=1\frac{1}{3}\ yd=\frac{1*3+1}{3}=\frac{4}{3}\ yd$

substitute

$A=(\frac{4}{3})^2\\\\A=\frac{16}{9}\ yd^2$

step 3

Find the pieces of sod needed

To find out how many whole pieces of sod will Jim need to buy to cover his backyard, divide the area of the backyard by the area of one piece of soda

$\frac{5,876}{30} : \frac{16}{9}=\frac{52,884}{480}=110.175$

Round up

111 pieces of soda

8 0

3 years ago

The following is the correct way to begin solving for the quotient of 37.665 divided by 4.5 using the standard method:

sasho [114]

The answer is True, hope it helped

4 0

3 years ago

Read 2 more answers

Mr. Mole left his burrow that lies below the ground and started digging his way at a constant rate deeper into the ground. After

hichkok12 [17]

7.5 minutes of digging

4 0

3 years ago

4 2/3 divided by 1/2

Andrej [43]

Answer:

the answer is 28/3 in exact form, 9.3 in decimal form and 9 1/3 in mixed number form. I hope it helps!

8 0

3 years ago

Read 2 more answers

Find the value of x in isosceles trapezoid ABCD<br> Given AC=3x-16 and BD=10x-86

Nastasia [14]

X = 10
(WORK SHOWN BELOW)

7 0

2 years ago