Ask question

Ask question

All categories

3 years ago

5

use the elimination method to solve the system of equations. choose the correct ordered pairs 7x+3y=30 and -2+3y=3

1 answer:

Mariulka [41]3 years ago

3 0

7x + 3y = 30
-2x + 3y = 3....multiply by -1
-----------------
7x + 3y = 30
2x- 3y = -3 (result of multiplying by -1)
----------------add
9x = 27
x = 27/9
x = 3

7x + 3y = 30
7(3) + 3y = 30
21 + 3y = 30
3y = 30 - 21
3y = 9
y = 9/3
y = 3

solution is (3,3)

You might be interested in

Evaluate 4(3.1+2) 20 20.8 24

amid [387]

Answer:

20112.25

Step-by-step explanation:

4x(5.3)x 20

20.3 x 20= 40.3

40.3 x 20.8= 838.24

838.24 x 24= 20112.25

5 0

3 years ago

Solve for x and y simultaneously <br><br>Pls help me

LenKa [72]

Step-by-step explanation:

Are the roots equal or unequal

3 0

3 years ago

A first number plus twice a second number is 8. Twice the first number plus the second totals 22. Find the numbers

Kaylis [27]

<span>2(22-2s) + s = 23,
44 - 4s +s = 23,
-3s = -21,
s = 7, the second number.
f = 22-2s = 22 - 14 = 8, the first number?</span>

5 0

3 years ago

1/2 of 00000000000000000000 is

TEA [102]

Answer:

1/2 duh dummy

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

HELPPPP I will mark brainiest wow I can’t spell

stira [4]

Answer:

V= $\frac{28\pi }{3}$

Step-by-step explanation:

Plug and chug into the formula, your radius is 2ft, and your height is 7ft.

$V=\pi*2^{2} *\frac{7}{3}$

V= $\frac{28\pi }{3}$ or 29.30 if $\pi =3.14$

6 0

3 years ago