Please help, I’ll mark you as brainliest

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

The polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping. 10x3 + 35x2 - 4x - 14 5x )-20 what is the common factor that is missing from both sets of parentheses?

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds.then use the distributive property and mental math to evaluate the expression.