1.Express 10n + 30 = 100 into mathematical statement.

A. The product of 10 and a number increased by 30 is equal to 100.

B. Multiply 10 and a number decrease by 30 equals 100.

C. Multiply 10 to the sum of a number and 30 to be equal to 100.

D. The sum of a number and 30 multiplied to 10 is 100.


2.Rudy is 8 years older than Carmel. Four years ago, he was twice as old as Carmel. How old is Rudy?

A. 12 yrs. old

B. 20 yrs. old

C. 10 yrs. old

D. 8 yrs. old


3.What is the product: (4ab^2 x^2 yz)(-8abx^2 y^2 z)

A. -2a^2 b^3 x^4 y^3 z^2

B. -32a^2 b^3 x^4 y^3 z^2

C. -28a^2 b^3 x^4 y^3 z^2

D. 12a^2 b^3 x^4 y^3 z^2​