Solve the following equation by factoring: x^2+ x– 42 = 0
1 answer:
You might be interested in
Z-score for 80% to pass = -0.842.
-60.624 = X - 426
X = 426 - 60.624
X = 365
Therefore the required passing score is 365.
-60.624 = X - 426
X = 426 - 60.624
X = 365
Therefore the required passing score is 365.
Answer:
mean ≈ 25.45
Step-by-step explanation:
mean is calculated as
mean =
We require the sum for both classes
class A
mean = = 40 ( multiply both sides by 9 )
sum = 9 × 40 = 360
class B
mean = = 20 ( multiply both sides by 24
sum = 24 × 20 = 480
Total sum for both classes = 360 + 480 = 840 , then mean for both classes is
mean = ≈ 25.45 ( to 2 dec. places )