Arectangle has a length of x centimeters and a width that is equal to half of its length. the perimeter of the rectangle is 22.5 cm .which equation represents this situation?
a. (x)(x/2) = 22.5
b. 1/2(x + x/2) =22.5
c. x + x/2= 22.5
d. x + 2x =22.5

Z4=289 there should be 4 answers total 2 whole numbers and either 2square root or imaginary number answers

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =