I don't understand 6k-6k+8-12k

Ms Jenkins art class has 35 students in art class. 7 of the 35 students are girls. What percentage of the class is made up of boys?

Which of the following measurements could be the side lengths of a right triangle? A. 24 in, 32 in, 40 in B. 24 in, 36 in, 40 in C. 20 in, 32 in, 40 in D. 24 in, 32 in, 48 in

If s (x) = x-7 and t (x) = 4x^2-x+3, which expression is equivalent to (t*s) (x)

A 10 kilogram object suspended from the end of a vertically hanging spring stretches the spring 9.8 centimeters. At time t

Write the mixed number as a fraction 4 1/8

Anna mixes the letters S, E, L, E, C, T, E, and D thoroughly. Without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will NOT be the letter Mary selects?

What is 39009909 times 339494

What is 13,507,804 in standerd form

You have $500 in a saving account that earns 3% simple interest per year. How much money will be in your account in 10 years

Janet has $120. If she saves $20 per week, in how many days will she have $500?