Find the next 3 terms of the arithmetic sequence.

-49, -35, -21, -7,

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=4 and bc=3, find ah, ch and bh.

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

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)