2 years ago

Y=2x+7 3x-y=-9 Solve each system of equation by the substitution method.

Mathematics

2 answers:

ANTONII [103]2 years ago

7 0

1. = 2x = 7
2. = 9 + 3x

givi [52]2 years ago

4 0

Plug in the first equation into the he second equation

3x-(2x+7)=-9
3x-2x-7=-9
x-7=-9
x=-2

plug in x=-2 into the first equation

y=2(-2)+7
y=-4+7
y=3

answer: (-2,3)

You might be interested in

Find the unit rate. 12 laps in 30minutes. <br> Asking for fraction

11Alexandr11 [23.1K]

Answer:

4/10 maybe cuz 12 divided by 30 is 0.4 and 0.4 would be 4/10

7 0

2 years ago

Caroline is making some table decorations.

jolli1 [7]

Answer:

Caroline buys 3 packs of candles and 5 packs of holders.

Step-by-step explanation:

1.) You need to add numbers of candle packs together until they both reach the same number, for example, multiples of 30 are 30, 60, 90.

2.) Then you add multiples of the holders. 18, 36, 54, 72, 90.

3.) You find that Caroline buys 3 pakcs of candles and 5 packs of holders to have the same number of both.

6 0

3 years ago

Write the next three terms of the arithmetic sequence.

zhannawk [14.2K]

The correct answer is …..3, 2 1/4, 2 1/2

3 0

2 years ago

Read 2 more answers

Solve the following equation algebraically: 3 x squared = 375 a. x almost-equals 49 b. x almost-equals plus-or-minus 49 c. x alm

d1i1m1o1n [39]

3x^2=375
x^2=125
x=11.18

c or d, they say the same thing

4 0

2 years ago

Evaluate the expression a3 -b/c for a = 3, b = 2 and c = 4. write in simplest form

Scilla [17]

Hello There!

Write out your equation:
$(a^3 - b)/c$
Substitute the values in:
$(3^3 - 2)/4$
Simplify:
$(27 - 2)/4$
$25/4$
Solve:
It is 6.25.

Therefore, your answer is 6 1/4.

Hope This Helps You!
Good Luck :)

- Hannah ❤

6 0

3 years ago