Will Give Brainliest if right! What is the equation of the line? Hint: Use the form y = mx.

Mathematics

1 answer:

Ksju [112]3 years ago

6 0

Answer:

slope is 4, so m=4

Step-by-step explanation:

y=4x+0

You do not need to include the 0, but that would be in the place of b.

If you need a coordinate for x and y, use (4,1)

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

Allushta [10]

Answer:

£110

Step-by-step explanation:

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:

$(45*4)/60$

We divide by 60 because there are 60 minutes in an hour, and he charges by hour. So:

$180/60=3$

Now, to find out how much to charge, we need to figure out how much to add to the £50. Since it's £20 an hour, and it takes 3 hours to do the 4 radiators, we need to multiply:

$3*20=60$