What is the solution to this system of linear equations?

2a – 3c = –6

a + 2c = 11

a. (-76/7, 17/6)
b. (3, –4)
c. (3, 4)
d. (87/7, -5/7)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b