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xxMikexx [17]
3 years ago
9

Amy has $1,000 in a savings account at the beginning of the fall. She wants to have at least $500 in the account by the end of t

he fall. She withdraws $100 a week for living expenses. Write an inequality for the number of weeks Amy can withdraw money, and solve.
A)1000 - 100w ≤ 500; w ≥ 6
B)1000 + 100w ≤ 500; w ≤ 5
C)1000 + 100w ≥ 500; w ≥ 6
D)1000 - 100w ≥ 500; w ≤ 5
Mathematics
2 answers:
Brrunno [24]3 years ago
6 0

Answer:

D) 1000 - 100w ≥ 500; w ≤ 5

Step-by-step explanation:

The correct answer is 1000 - 100w ≥ 500; w ≤ 5. Take the starting amount, 1000, and subtract 100 “w” times (“w” is the number of weeks). This expression must be ≥ 500 since she wants to have at least $500. Solve the inequality to get the answer.

Olin [163]3 years ago
4 0
ANSWER:
D) 1000 - 100w \geq 500; w \leq 5

WHY NOT A?
Well, choice a says that you can have less than or equal to $500 (\leq 500), but she wants $500 or more. Additionally, she can only do it for 5 weeks,  but the equation says 6 weeks (w\geq 6).

WHY NOT B?
This choice says that she will be adding $100 a week (+100w), when the problem states, "She withdraws $100 a week". 

WHY NOT C?
This choice says that she will be adding $100 a week (+100w), when the problem states, "She withdraws $100 a week". Also, this question says that she will do it for 6 weeks when she can only do it for 5 weeks or less.
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