A teacher has a chart she would like to enlarge to put on a bulletin board. The chart is 8 cm across, and the space on the bulle
tin board is 40 cm across. What should the zoom setting be for a copy this size?
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Response:9/10/3/5
Detailed explanation: because... believe me
Answer:
1. 8.4 2. 15
Step-by-step explanation:
1. 4x + 8y = 40
when y = 0.8
4x + 8 × 0.8 = 40
4x = 40 - 8 × 0.8
4x = 40 - 6.4 = 33.6
....x = 33.6 / 4 = 8.4
2. 3a + b = 54
when b = 9
3a + 9 = 54
3a = 54 - 9
3a = 45
.....a = 45 / 3 = 15
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