Answer:
The answer is 29.25
Step-by-step explanation:
Using distributive property, the equation would be 3(9.75).
9.75*1+9.75*1+9.75*1=29.25
"5 times a sum of 12 and a number is 80" translates to the next equasion:
5 x (12+a) = 80
Now we just have to solve it to find the value of a.

The unknown number is 4.
D is the right answer.
Answer:
D 15
Step-by-step explanation:
Count all of the x's less than 1 1/2 = 15
15.38. 7, the number in the hundredths place, is turned into 8 due to the following digit, 5. Since it is equal to the minimum, 5, the previous number is rounded up.
Answer: 3rd option (-2, -3)