Question

stacy is saving up to buy a new phone. she already has $300 saved, and her goal is to have at least 60% more 10 weeks from now. she will save the same amount of money each week. stacy wants to find d, the amount in dollars she must save each week to reach her goal. which inequality can she use? 10d ≥ 300(0.6) 10d + 6d ≥ 120(1 - 0.6) 10d ≥ 300 + 300(0.6) 10d + 6d ≥ 300 now, complete the sentence. stacy must save per week in order to achieve her goal.

Explanation:

Step1: Calculate 60% of 300

$300\times0.6$

Step2: Determine total amount needed to save in 10 weeks

The amount she needs to save in 10 weeks ($10d$) should be at least 60% of 300. So the inequality is $10d\geq300\times0.6$.

for the second - part:
Solve the inequality $10d\geq300\times0.6$. First, calculate $300\times0.6 = 180$. Then, divide both sides of the inequality $10d\geq180$ by 10. We get $d\geq18$. So Stacy must save at least $18$ per week.

Answer:

A. $10d\geq300(0.6)$; $18$