3 years ago

How many solutions are there to the following system of equations?

1 answer:

5 0

$4x-14y=6 \\
-2x+7y=-3 \ \ \ |\times 2 \\ \\
4x-14y=6 \\
\underline{-4x+14y=-6} \\
4x-4x-14y+14y=6-6 \\
0=0 \\ always \ true \\ \\
\boxed{\hbox{infinitely many solutions}} \Leftarrow \hbox{answer C}$

You might be interested in

3(y-1)=y-11 plz solve this equation with explaination

stellarik [79]

3(y-1)=y-11

Distribute:
3y - 1 = y- 11

Add 11 to both sides

3y - 12 = y

subtract 3y on both sides

-12 = -2y

Divide by 2y

y= 6

3 0

2 years ago

Read 2 more answers

Angle A and B are supplementary angles. The measure of angle B is twice the measure of angle A minus 24. Find the measure of the

ivann1987 [24]

Answer:

A = 58

B = 112

Step-by-step explanation:

A + B = 180 Supplementary angles

B = 2A - 24 Given

Substitute for B in the first equation

A + 2A - 24 = 180

3A - 24 = 180 Add 24 to both sides

3A = 180 + 24 Combine the right

3A = 204 Divide both sides by 3

A = 204/3

A = 68

B = 2A - 24

B = 2*68 - 24

B = 136 - 24

B = 112

5 0

2 years ago

Does anyone happen to know this answer??

const2013 [10]

Answer:

8.5

Step-by-step explanation:

to do this you would multiply 2.125 or 2 1/8 by 4

4 0

3 years ago

To each of the fraction below find 3 fractions with denominators powers of 10 getting closer and closer to it and hence write it

g100num [7]

Solution:-1

$\\ \sf\longmapsto \dfrac{4}{7}$

$\\ \sf\longmapsto \dfrac{5}{8}$

$\\ \sf\longmapsto \dfrac{2}{9}$

Solution:-2

$\\ \sf\longmapsto \dfrac{1}{11}$

$\\ \sf\longmapsto 0.09$

7 0

3 years ago

PLEASE HELP ME FIND THE ANSWER

Marianna [84]

Answer:

Plumber A makes $20 more

Step-by-step explanation:

Plumber A makes $290 in 3 hours (200 + 30 x 3)

Plumber B makes $270 in 3 hours (150 + 40 x 3)

290 - 270 = $20

4 0

3 years ago