If the value of b is 7 , then what is the value of the expression -3b2 + 25 = ?

Find the value of x. give reasons to justify your solutions! c ∈ ae

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4