# Math

A plumber charges \$45 for a service call, plus \$70/h for her time.

a. Find the cost of a two hour service call.

b. How long was a services call that cost \$150?

Also .......

as the weight held by a spring increases, the length of the spring increase proportionally. suppose a 2-lb weight stretches a spring to 15 in., and a 12-lb weight stretches the same spring to 20 in. what is the length of the spring with no weight attached?

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1. a. C = 45 + 70*1 = \$115 = Cost.

b. 45 + 70X = \$150,
70X = 150 - 45 = 105,
X = 1.5h.

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2. sooka my dik

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3. sook me hary bllz

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4. slope of the line through A(2, 6) and B(8, -1)?

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5. a. cost=45+70*2=45+140=\$185
b. \$150-\$45=\$105 \$105/\$70=1.5 hrs

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