How do you do mathematics

Find the x intercepts for y=x^2-2x

Evaluate. Write your answer as a fraction in simplest form. (1/2) 4

The deer population increases at a rate of 3% per year. There are 1253 deer this year. Write a function that models the deer population. About how many deer will there be in 6 years?

Find the quotient. 8,489:9

Divide 21 by g. Then, subtract 6.

the temperature at dawn was - 2°F during the day the temperature increased 15 degrees and then dropped 10 degrees in the evening

The least common denominator of 1/2, 1/6, and 1/9 is:

Shirley wants to buy a skateboard for $64. She has $98 in her account. She spends $10.85 to buy stationary. She also wants to buy some cookies for $1.65 each.

What is the answer to - 28 + 38

The probability that a battery will last 10 hr or more is 0.9, and the probability that it will last 15 hr or more is 0.11. Given that a battery has lasted 10 hr, find the probability that it will last 15 hr or more.