3. Mr. Li's classroom has a perimeter of 90 feet. The length of the room was 15 feet shorter than twice the width. Using algebra, determine the dimensions of the classroom. Show your work. (Remember, the dimensions of a rectangle are length and width.)

you divide the cost ($15) by the quantity (6) to get your questions answer. the yo-yo costs $2.50. hope this : )!

step-by-step explanation:

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value