Free Practice Question
PS · Problem Solving
sub-505
Algebra
Given that x is not equal to zero, if 4x = 10y and 6z = 8x, what is the ratio of z to y?
Answer Choices
Correct answer marked belowA
4 to 5
B
15 to 8
C
12 to 5
10 to 3
Correct
E
20 to 3
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Explanation
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Official Explanation
Official
Since x is not zero, we have 4x = 10y, which gives us y = 4x/10 = 2x/5. Also, from 6z = 8x, we find z = 8x/6…
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Sign in to commentWhat this question tests
What it tests
Your ability to manipulate linear and quadratic expressions, substitute unknowns, and solve equations under time pressure.
Common trap
Losing a sign when moving terms across the equals sign, or dividing both sides by a variable that could equal zero.
Details
Difficulty
sub-505
Type
PS
Category