Answer:
2(8+4)
Step-by-step explanation:
We have 4 expressions here:
4(4+4):
Since 4*4=16
4(4+4)=16+16
4(4+8):
Since 4*4=16 and 4*8=32
4(4+8)=16+32
2(14+4):
Since 2*14=28 and 2*4=8
2(14+4)=28+8
2(8+4):
Since 2*8=16 and 2*4=8
2(8+4)=16+8
The answer is 2(8+4)!
Hope this helps!
Answer:
We accept H₀ . We don´t have enough evidence to express the publisher claim is not true
Step by Step explanation:
We must evaluate if the mean of the price of college textbooks is different from the value claimed by the publisher
n < 30 then we must use t - distrbution
degree of freedom n - 1 df = 22 - 1 df = 21
As the question mentions " different " that means, a two-tail test
At 0,01 significance level α = 0,01 α/2 = 0,005
and t(c) = 2,831
Test Hypothesis
Null Hypothesis H₀ μ = μ₀
Alternative hypothesis Hₐ μ ≠ μ₀
To calculate t(s)
t(s) = ( μ - μ₀ ) /σ/√n
t(s) = ( 433,50 - 385 ) / 86,92 / √22
t(s) = 2,6171
Comparing t(c) and t(s)
t(s) < t(c)
Then t(s) is in the acceptance region we accept H₀. We don´t have enough evidence to claim that mean price differs from publisher claim
This is a right triangle. If the triangle were laid down, on an end, a right angle would be visible.
6x^2+14x-12 is the answer
