How do i find the measure of an interior angle of a regular polygon with 12 sides

Find the slope and the y-intercept of the line with equation 9x + 10y = 91.

A savings account compounds interest, at a rate of 15%, once a year. Elizabeth puts $800 in the account as the principal.

Nolan just drove at a constant rate for 5 hours. He is now 340 miles from where he started. At what rate was he driving? Nolan has another 204 miles to go. If he continues to drive at the same rate, how long will it take him?

Solve x for the equation 2x^2-5x+1=3

Francine wants to find a total of 2/3 cup of blueberries and 5/8 cup of raspberries what is the least common denominator of the fractions

D-21.4=87.9 Explain your answer

Calculate 6.75-3.1 and round to the correct number of significant digits

noah and his Children went into the grocery store and they were still in apples for one dollar each and mangoes for two dollars each Noah has $20 to spend and most by at least nine apples and mangoes all together if Noah decided to buy for apples

The radius of a circle with area A is approximately √A/3. The area of a circular mouse pad is 54 square inches. Estimate its radius to the nearest tenth.

Which number is not a perfect square? A) 4 B) 9 C) 144 D) 84