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Elan Coil [88]
3 years ago
13

When servicing a heating boiler and radiators, a plumber knows that the time

Mathematics
1 answer:
Elena L [17]3 years ago
3 0
£110 as 45mins times 4 radiators divided by 60 mins =3 hours

3 hours + 1 hour = 4 hours
4 hours times £20= £80
£80+£30=£110
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Which of the following is an example of simple harmonic motion?
pshichka [43]

For apex the answer is D

3 0
3 years ago
Evan went to the park and saw four animals.
dsp73

Answer:

He saw <u>1 duck</u> and <u>3 dogs</u>.

Step-by-step explanation:

Given:

Evan went to the park and saw four animals.

Each animal was either a duck or a dog.

He saw a total of 14 legs.

Now, to find the number of each animal he had seen.

Let the number of duck be x.

And the number of dog be y.

So, total number of animals:

x+y=4\\y=4-x

Now, the total number of legs he did see:

<em>As we know the legs of a duck are 2 and a dog are 4.</em>

2x+4y=14\\2x+4(4-x)=14\\2x+16-4x=14\\-2x+16=14

Adding both sides by -16 we get:

-2x=-2

Dividing both sides by -2 we get:

x=1

The number of duck = 1.

Now, putting the value of x in above equation we get:

y=4-x

y=4-1\\y=3.

The number of dogs = 3.

Therefore, he saw 1 duck and 3 dogs.

4 0
3 years ago
Given the triangle below,what is the length of the hypotenuse
motikmotik
Hypotenuse = 9cm^2+ 13cm^2
=81 +169
=250
= \{250}(find the square root)

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6 0
3 years ago
Read 2 more answers
Which values of m and b will create a system of equations with no solution? choose 1 options.
hichkok12 [17]

Answer:

The graph of a linear equation is a straight line.  The "solution" to a system of two linear equations is the point where the two lines cross.  If the two lines are parallel, they never cross; hence parallel lines have no solution.  Two lines are parallel if they have the same slope (the m value in y = mx+b).  One of your equations is y = -2x + (you left the y-intercept out).  The slope is -2.  So any line with a slope of m = -2 will be parallel to this line and will not cross it.  The second line also needs a different value of b, the y-intercept.  Otherwise it is the same line and every point is a solution.  So if your equation is:

 

y = -2x + 1

 

Then any equation of the form y = -2x + b, b≠1 will create a system with no solution.  Hence the values of m and b are m = -2, b ≠ 1.

5 0
2 years ago
9e^x-240=6e^x+270 what is the solution
zmey [24]

e^x=170

because you subtract like terms (or add, it depends) then simplify (im bad at explaining)

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3 years ago
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