Complete Question:
Heights of 9-Year-Olds At age 9 the average weight (21.3 kg) and the average height (124.5 cm) for both boys and girls are exactly the same. A random sample of 9-year-olds yielded these results. Estimate the mean difference in height between boys and girls with 95% confidence. Does your interval support the given claim?
Boys Girls
Sample Size 60 50
Mean Height, cm 123.5 126.2
Population variance 98 120
a.State the hypotheses and identify the claim.
b.Find the critical value(s).
c.Compute the test value.
d.Make the decision.
e.Summarize the results.
Step-by-step explanation:
Find attachments for complete solution
Answer:
4x^3+x^2-20x-5
Step-by-step explanation:
f(x)=4x+1 and g(x)=x^2-5
(fg)(x) = f(x) *g(x)
= (4x+1) *(x^2-5)
FOILing
First 4x*x^2 = 4x^3
outer 4x*-5 = -20x
inner 1 * x^2 = x^2
last 1 * -5 = -5
Add them together
= 4x^3 -20x+x^2-5
Put the terms in order from greatest power to least power
=4x^3+x^2-20x-5
8 × 27 = 216
216 ÷ 24 = 9
Answer: 9 lbs
or 27 - 24 = 3 ... 3 × 8 = 24 which would put 1 more lb of flour for each box
8 + 1 = 9
Answer:
180
Step-by-step explanation:
(assuming each car has 4 tires)
45*4= 180
Hope this helps! :)
(2/3) x + (2/5) x
(10/15)x + (6/15) x = (16/15) x