Isandro and Yvette each have a calculator. Yvette starts at 100 and subtracts 7 each time. Isandro on the other hand, starts at
zero and adds 3 each time. If they press the keys at the same time, will their displays ever show the same number? if so, what is the number?
1 answer:
Yvette = 100-7x
Isandro = 0+3x
0+3x = 100 - 7x
0+3x+7x = 100 - 7x +7x
10x = 100
x = 10
So on the 10th time they have the same number, which is 30.
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In math the sum means to add
??... what lol good job tho
let the consecutive multiples be 7(n-1) , 7n and 7(n+1)
so 7(n-1)+7n+7(n+1)=777
or 3n=111,
n=37
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Your answer will be D and E
-30 is the answer to your problem.
