Me asap!
will give brainliest if you answer all of my questions!
don't forget the image ^^

8b) solve the pair of simultaneous equations:
9x + 7y = 10
3x + y = 2

A: can't see the image.

8b: 9x + 7y = 10... equation 1

3x + y = 2...equation 2

make y the subject of the formula using equation 2

y=2 - 3xequation 3

substitute for y using equation 3

9x + 7(2 - 3x) = 10

9x + 14 - 21x = 10

9x - 21x = 10 - 14

-12x = -4

divide both sides by -12

x = 1/3

substitute for x using equation 2

3(1/3) + y = 2

1 + y = 2

y = 2 - 1

y = 1

so x = 1/3 and y = 1

i would say c is the best answer, hope it's right!

good luck! =)

cutie~

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0