3 years ago

2y +9 =x 9x- 8y=31 System of substitution

Mathematics

2 answers:

Ilya [14]3 years ago

6 0

Answer:

I have solve it in above picture

VLD [36.1K]3 years ago

3 0

Answer:

x = -1

y = -5

Step-by-step explanation:

9(2y+9) - 8y = 31

18y + 81 - 8y = 31

10y + 81 = 31

10y = -50

y = -5

2(-5) + 9 = x

-10 + 9 = x

-1 = x

You might be interested in

Work out cube root of 512 : reciprocal of 0.4. Give your answer in the form n : 1

galben [10]

Step-by-step explanation:

Thanks, so cube root of 512 is 8 and reciprocal of 0.4 is 2.5 then:

8 : 2.5 / divide both by 2.5 to get:

3.2 : 1 that's my answer right?

3 0

2 years ago

Calculate the average between 200 and 4100

yKpoI14uk [10]

<span>4300 / 2 = 2150

Just simply divide</span>

8 0

3 years ago

Read 2 more answers

In a sport competition Alyssa was penalized -16 points in each of the 4 events how many points was she penalized in each event?

borishaifa [10]

-4 because -16-4=-4. Negative and a positive make a negative

5 0

3 years ago

A large pizza with diameter of 18 in. is cut into 8 equal slices. How long is the crust of one slice of pizza.

Semmy [17]

Answer:

Step-by-step explanation:

18/2=9

Oh wait. I am wrong

7 0

3 years ago

What is the radical form for 2 1/2

adelina 88 [10]

Answer:

it would be √2 or 1.41421356

Step-by-step explanation:

its correct

4 0

3 years ago