How to simplify - 12 minus (-5)

Does anyone know any other good apps for math like Algebra 1.?

You have a photo that measures 1 in. wide by 3 in. tall. If you want to enlarge the photo so that the height is 18 in., what will the width of the photo be?

Y=8-2x closest numerator

Solve the equation 2m2 - 6m + 14 = 0.

Everyone in a class of 30 students takes math and history. Seven students received an A in history and 13 received an A in math, including four that received an A in both courses. How many students did not receive an A in any of these two courses?

Need to find the side lengths for a triangle with sides a=2a, b = 3a, c = 17. need to solve for variable a and not sure how.

Which inequality has no solution? 6 (x+2) > x-3 3+4x<2 (1+2x) -2 (x+6) < x-20 x-9 < 3 (x-3)

Every cupcake Jake bakes weighs 0.45 pounds how much will a box of 100 Cupcakes weigh

The surface area of the given cube is 150 square feet. a) 5 cubic feet b) 25 cubic feet c) 125 cubic feet d) 625 cubic feet

If x=7+root 40, find the value of root x+1by the root of x