Is 42 prime or composite

54 divided by 7 simplified

Is the square root of 7 rational

A 1313 -foot ladder is leaning against a building, with the base of the ladder 22 feet from the building. How high up on the building will the top of the ladder reach?

Combine the like terms to simplify the polynomial. Show any work. Put your answers in standard form. (5x^4-3x^3+2x^2-15x+27) + (7x^4+5x^3-x^2+8x-13)

Decreasing 800 by 30%

Write word phrase to represent the numerical expression below. 4 + (27-10)

Find the value of y when x=2 - x - (-2) = y

In a group of 21 students, 8 students take Art courses, 7 students take Music courses. Two students take both courses. A student is chosen randomly from this group. What is the probability that the student takes either Art or Music courses? 57

5% of what number is 63?

Find the sum of the "n" terms of the series: Sn=1²+3²+5² + ... + (2n-1) ²