In an AP. 19th term is 52 and 38th term is 128. Find the sum of the first 56 terms.

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

What is the value of x when x + 7 = 21?