Can someone explain this I'm so confused

1. 15 : 5 + 1/2 · (-4/7)

2. - 7/10 + (-5/12) - (1/4)

What is a base in 8th grade math

Find f' (x) for f (x) = - 8x^2 - 5x - 4. A.) - 16x - 5 B.) - 16x - 4 C.) 16x + 5 D.) None of these

What is the simple interest that is missing from the table? p $375 r 2.2% t 3 years

Estaban is making turtle brownies. The recipe calls for 3/4 bags of carmel squares. One bag has 24 caramel squares in it. Estaban decides to make two batches of turtle brownies.

What is the product of4 2/3 and 11,1/4

Which is longer fewer inches, or fewer centimetres?

Leroi and Sylvia both put 100$ in a saving account. Leroi decides he will put in an additional 10$ each week. Sylvia decides to put in an additional 10% of the amount in each account each week.

A pancake recipe calls for 1/4 of a cup of powdered milk and three have cups of whole wheat flour for each batch of pancakes.

What is 15/21 subtracted by 5/7 equal?

In the slope - intercept equation of a line which quantity is given by the coefficient of the term x-term?