X=the number we have to find.
This expression "2(x+9)" is when the sum of a number and nine is doubled.
If the result is seven less than the number, we will have: x-7
We can suggest the following equation:
2(x+9)=(x-7)
2x+18=x-7
2x-x=-7-18
x=-25
answer: the number would be: -25.
Answer:
Step-by-step explanation:
2x + 8y = 19
5x + 7y = 15
Answer:

Step-by-step explanation:
Given
-12 and -15
Required
Solve the difference
The question you posted included the solution. However, the solution is incorrect;
The absolute difference is represented as:

In this case:


So, the distance is calculated as:

Open bracket



Answer:

Step-by-step explanation:
To solve this B needs to be isolated. First we must multiply both sides of the equation by 2 to get rid of the fraction on the left side. Next, divide both sides by h to get rid of the h on the left side. Finally, subtract b form both sides to get B by itself.
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.