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telo118 [61]
2 years ago
13

Help meeeeee!!!!!?????

Mathematics
1 answer:
miss Akunina [59]2 years ago
6 0

Answer:

Equation: 48t + 265 = 553

t = 6

Step-by-step explanation:

48t + 265 = 553

48t = 228

t = 228/48

t = 6

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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:

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6 0
3 years ago
Find the y intercept and slope
Naya [18.7K]
Okay so first off the equation of a line is
Y=mx+b
m= the slope
b= the y intercept

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The equation for this line would be y=5/3x+2
6 0
3 years ago
Kristin charges $30 to train a small dog, and $50 to train a big dog. If Kristin trains 15 small dogs and 6 big dogs, how much m
tangare [24]

Answer:

$750

Step-by-step explanation:

We can set up the equation 30x + 50y =  z where x = the amount of small dogs, y = the amount of big dogs, and z = the total.

After plugging in the x and y values to solve for z, we are left with the following equation:

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3 0
2 years ago
The proportion of students in a psychology experiment who could remember an eight-digit number correctly for t minutes was 0.9 −
kaheart [24]

Answer:

The proportion would be 0.1

Step-by-step explanation:

Given, the function that shows the proportion of students in a psychology experiment who could remember an eight-digit number correctly for t minutes,

f(t) = 0.9 - 0.4\ln(t)

If t = 7 minutes,

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Hence, the proportion that remembered the number for 7 minutes is 0.1 ( approx )

8 0
2 years ago
What is 2times .4 tell me how you solved it sorry I forgot how to do that
Eva8 [605]
2 times 0.4 = 0.8.

0.4
X 2
_____
0.8
7 0
3 years ago
Read 2 more answers
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