I guess that u = μ & that a=σ. If so:
μ =100 & that σ =20 & x=20
Z score = (x-μ) / σ ==> Z score = (90-100)/20 ==> Z = - 0.5
Answer:
y = 5x
Step-by-step explanation:
y = 5x where x is the number of questions answered correctly
Set up equations to solve. Let C = number of balls Caiden hit and let J = number of balls Josh hit.
The following equations are given:
J = (1/2)C + 9
C + J = 123
Substitute the first equation into our second equation and solve for C.
C + (1/2)C + 9 = 123
(3/2)C + 9 = 123
(3/2)(C) = 114
C = 76
Now plug in our C value into our second equation to solve for J.
76 + J = 123
J = 47
So Caiden hit 76 balls and Jos hit 47 balls.
Answer: x^2 + 3x - 1.
Step-by-step explanation: We need to divide x^3 + 5x^2 +5x-2 by x+2. This is dividing polynomials. Divide each number by x and multiply the quotient by 2 and subtract the answer.