Answer:
A, B, C, and E
Step-by-step explanation:
y = 4x - 20
8x - 2y = - 20 (divide everything by 2)
4x - y = -10
-y = -4x - 10
y = 4x - 10
4x - 10 = 4x - 20
0 
-10
No solution
61.) First you have to think there are 36 packs, 12 cards in 1 pack and 2 stickers in one pack. SO you have to multiply 36 by 12 and 2 by 36. Your answer for 61 will be (36 x 12) + (36 x 2)
Hopefully this helps.
Question 1: 60x + 25 + 60y
Generic exponential growth model: y = Ao[1+r]^t
In this case: r = 3.5% = 0.035
y = 2Ao .....[the double of the initial value]
Then: 2Ao =Ao (1 + 0.035)^t
(1.035)^t =2
Take logarithm to both sides
t ln(1.035) = ln(2)
t = ln(2) / ln(1.035) = 0.693 / 0.0344 = 20.15
Answer: 20.15 hours.
