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3 years ago

G(t)= t^2 + 3 h(t) = 4t – 3 Find (g · h)(-1)

Mathematics

1 answer:

MArishka [77]3 years ago

6 0

Answer:

fifty-two. Explanation: g(h(−1 ))=g(x). x=h(−1)=4(−1)−3=−4−3=−7. g(x)= g(−7)=72+3=49+3=52.

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3 years ago

When servicing a heating boiler and radiators, a plumer knows that the time he will take is given by the formula

Allushta [10]

Answer:

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We know how much time it takes for a boiler and a radiator, and we need to know how much it will cost for 1 boiler and 4 radiators. We have an initial cost of £30, and since hes doing a boiler - which we know takes an hour - we can already add £20 for a start of £50.

Now, there are 4 radiators, that take 45 minutes each. We need to use this equation:

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$3*20=60$

Now we add our totals for a grand total of...

$50+60=110$

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3 years ago