Cindy has $25 saved and earns $12 per week for walking dogs. Mindy has $55 saved and earns $7 per week for watering plants. Cind
y and
Mindy save all of the money they earn and do not spend any of their savings. After how many weeks will they have the same amount saved?
How much money will they have saved?
Mindy save all of the money they earn and do not spend any of their savings. After how many weeks will they have the same amount saved?
How much money will they have saved?
1 answer:
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Answer:
B) 8 and 24.
Step-by-step explanation:
Just by looking at the answer choices, since one number must be three times the other, we can determine that the correct answer is B.
Regardless, let's work this out mathematically. Let the first number be <em>a</em> and the second number be <em>b</em>.
Their difference is 16. Hence:
The first number is three times the second number. So:
Substitute:
Solve for <em>b</em>. Subtract:
And divide both sides by two:
So, the second number is 8.
And since the first number is three times the second, the first number is 24.
Our answer is B as expected.