Let Daniel's age be 'x' years , hence, Lisa's age is (x - 5) years. Let Grandma's age be 'y' = 54 years.
Hence,
x(x - 5) = 2/3 × y
x² - 5x = 2 × 54 years / 3
x² - 5x = 36 years
x² - 5x - 36 = 0
∆ = (-5)² - 4(1)(-36) = 25 + 144 = 169
√∆ = √169 = 13

x1 = (5+13)/2, x2 = (5-13)/2
x1 = 9, x2 = -4
Since, age can't be negative,
Daniel's age = x = 9 years.
Let t = the number of tacos sold
Let b = the number of burritos sold
3t + 7.25b = 595
B=2t
Answer:
3. Jonathon does 2 push-ups for every 15 crunches.
Step-by-step explanation:
Hope it helps
Answer:
3, 4, Point R to Point Q, and depression from Point Q to Point R
Step-by-step explanation:
......