Let's call the younger student's age A and the older student's age B. The teacher's age will be T.
B = 2A
T = 5B
T+5 = 5(A+5)
Simplify the last equation.
T+5 = 5A+25
T = 5A+20
Now we have two equations solved for T, so we can set them equal to each other.
5B = 5A + 20
We can plug 2A in for B
5(2A) = 5A + 20
10A = 5A + 20
5A = 20
A = 4
To find T, we plug 4 in for A in T = 5A + 20
T = 5(4) + 20
T = 40
The answer is 40 years old.
Answer:
A) 20%
Step-by-step explanation:
A) ✅
500000(0.2) = 100,000
500000 - 100,000 = 400,000
B) ❌
500000(0.25) = 125,000
500000 - 125,000 = 375,000
C) ❌
500000(0.3) = 150,000
500000 - 150,000 = 350,000
D) ❌
500000(0.35) = 175,000
500000 - 175,000 = 325,000
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The answer is b cause none of x is the same number
