3 years ago

Use substitution to solve the following system of equations. -2x + 4y = -18 AND x = y + 3

Mathematics

2 answers:

Annette [7]3 years ago

5 0

Answer:

x = -3 y = -6

Step-by-step explanation:

x = y + 3

x - 3 = y

-2x + 4(x - 3) = -18

-2x + 4x - 12 = -18

2x = -6

x = -3

x = y + 3

-3 = y + 3

-6 = y

loris [4]3 years ago

4 0

Answer:

x = -3 ; y = -6

Step-by-step explanation:

x = y + 3

-2x + 4y = -18

-2(y+3) + 4y = -18

-2y -6 + 4y = -18

2y = -12

y = -6

x = -6+3

x = -3

You might be interested in

Hank's pickup can travel 80 miles on 5 gallons of gas. How many gallons will Hank's pickup need to travel 64 miles?

mr_godi [17]

Answer:

4 gallons

Step-by-step explanation:

80/5 will give you 16 so for each gallon the car can move 16 milles

so 64/16 = 4 so he will need 4 gallons of gas in order make the trip

4 0

3 years ago

Read 2 more answers

What is 83% as a decimal SHOW WORK IF U CAN HELP ASAP!!

Marat540 [252]

0.83Answer:

Step-by-step explanation:

83% means 83 per 100 or 83/100 if you divide 83 by 100 you get 0.83

5 0

3 years ago

Read 2 more answers

If i got 17 questions out of 20 correct then what is my grade on the paper?

Svetradugi [14.3K]

Hello,

Your answer would be:

75%

Plz mark me brainliest

3 0

3 years ago

Read 2 more answers

PLZ HELP GIVING CORRECT ANSWER THE BRAINLIEST!!

beks73 [17]

Answer:

About 20.8

Step-by-step explanation:

form a triangle using each line

3 0

3 years ago

Kelsey has a little baby brother he weighs 8 pounds in 3 ounces the doctor said the baby should get about 5 ounces per week at t

Virty [35]

Answer:

11.9375 and just round it

Step-by-step explanation:

multiply 8 pounds to 16 to get ounces and then add three and 60(5 x 12) and then add all of it together and then divide it to 16 to get 11.94 pounds or however you want to round it. If you need more a more deeper explanation just ask.

4 0

3 years ago