Which ordered pair is a solution of the linear system: x+2y=-8 and
1 answer:
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Answer:
f(- 2) = 8
Step-by-step explanation:
Evaluating for x = - 2
f(- 2) = 2 - 4(- 2)³ - 11(- 2)² + 3(- 2) - 6
= (2 × 16) + (- 4 × - 8) + (- 11 × 4) - 6 - 6
= 32 + 32 - 44 - 6 - 6 = 8
Answer:
Step-by-step explanation:
Assuming that:
the promotion will be considered to be a success if more than 10% use the coupons received.
and coupons are sent to 100 credit card customers.
Then, the null hypothesis and alternative hypothesis is:
sample size n = 100
Using the eagle file data;
the no of people in the sample who use the coupon = 13
then,
Test statistics can be computed as:
At ∝ = 0.05
Since, P-value is greater than ∝, then we fail to reject .
Therefore, Eagle should not go with the promotion; a larger sample should be taken.