orangecamel550

Give a word problem example to find this expression

4/7x = 2/8

what are enzymes

Twice a number (z)added to 21 is equal to 9 times the number added to 7. What is the number?

A.  z = -4

B.  z = -2

C.  z = 2

D.  z = 4

What is the chemical formula for oxygen

Please solve this for x:

5x^2 + 9x + 8=0

Who was the first prime Minister

Simplify.