Arectangle has an area of 10x^2-29x-21 square units. which of the following could represent the primeter of the rectangle in terms of x?
a. 2x-7
b. 5x+3
c. 7x-4
d. 14x-8

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle