Let the present age of student be x
Present of teacher will be 4x
After 20 years,
Age of student = x + 20
Age of teacher = 4x + 20
According to the given condition after 20 years,
x + 20 = (4x + 20)/2
x + 20 = 2x + 10
2x - x = 20 - 10
x = 10
So student's present age is 10 years while teacher's is 4 x 10 i.e 40 years.
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Answer:
393 more minnows than goldfish
Step-by-step explanation:
add 458 rosy red minnows and 212 white minnows,you get 670.Subtract the 277 goldfish from the 670 minnows and you get 393
Answer: -1 1/2 to -1: -1 1/3 and -5/4
-1 to -1/2: -2/3, -3/4, -6/7, -5/6
-1/2 to 0: -1/3 and -3/8
0 to 1/2: 1/5, 1/10, 3/12, 3/8, 3/7, 1/3
1/2 to 1: 4/5, 6/10, 7/8, 7/9, 3/4, 8/10
1 to 1 1/2: 1 5/12, 9/8
Step-by-step explanation:
42000/12=3500 assuming he doesn't buy anything else like food clothes exc.
Answer: y = 2
Explanation:
When x = 3, y = -15
And x and y are directly proportional.
thus x + k ==> y + k
when x = 3 + 17 ==> y = -15 + 17
=> x = 20 ==> y = 2
