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BARSIC [14]
3 years ago
9

A copy machine can print 480 every 4 minutes a teacher printed 720 how long did it take

Mathematics
1 answer:
Nutka1998 [239]3 years ago
4 0

Answer:

6 minutes

Step-by-step explanation:

480/4 = 120 , 720/120 = 6  minutes Hope this helps

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A plumber charges $130 2 hours of work and $235 for 5 hours of workWhat is the of change in dollars per hour
kogti [31]

Answer:

235

Step-by-step explanation:

Figure the rates per hr.

110/3 = 36 2/3

160/5 = 32.

So, the rates are not the same.

Knowing a bit about plumbers, they normally charge a basic fee to just show up, and then they charge per hr.

In cases like these, where we're asked to project to a new data point (in this case an 8-hr job), you should immediately think of a graph. The x-axis would be the hours worked. The y-axis would be the charge for the work (the cost of the job).

We're given two pairs of values:

(3,110) and (5,160).

The next step is to fit a line to them.

y = mx+b is the general equation for a line.

m = the slope = rise/run = change in y / change in x

Call the change in y, dy (for delta y).

Call the change in x, dx (for delta x).

m = dy/dx = 50/2 = 25

The slope is thus 25, which means for each hour, the price goes up by $25. That means the plumber charges $25/hr.

We also know the plumber charges $110 for a 3-hr job. 3*25 = $75. So the base charge would be $110-75 = $35.

y = 25x + 35

Checking this formula at x=3, we know it is 110.

Checking it at x=5, we obtain:

y = 25*5 + 35 = 125 + 35 = 160.

That checks.

Now to figure an 8-hr job, set x=8 and use the equation"

y = 25*8 + 35.

y = 200 + 35.

y = 235.

That means an 8-hr job costs $235.

3 0
3 years ago
Find the volume of the prism.<br> 9km 8km 6km
HACTEHA [7]

The correct answer is option B which is the volume of the prism is 216 km³.

<h3>What is the volume of the prism?</h3>

A prism is a three-dimensional solid with a triangular base called a triangular prism. The volume of the triangular prism is equal to the product of the area of the base and the height of the prism.

The volume of the prism will be calculated by using the formula below:-

V  =  Area of the base   x   Height

Since the base is a right-angle triangle so we will calculate the area of the right-angle triangle.

V  =  Area of the triangle  x  Height

V  =  ( 1/2 ) x 8 x 6 x ( 9 )

V  =  216 km²

Therefore the correct answer is option B which is the volume of the prism is 216 km³.

To know more about volume follow

brainly.com/question/1972490

#SPJ1

6 0
2 years ago
What are the positive and negative square roots of 1,6007
Dmitry [639]

Answer: 126.52

Step-by-step explanation:

The square root of 16,007 is approximately 126.52

There are no negative square roots

4 0
3 years ago
Urgent 50 points please put all the steps to finish
Anna71 [15]

- 3x +  y =  - 2 \\y = 3x - 2

7 0
3 years ago
Read 2 more answers
What is the sum of 24+40 as the product of their GCF and another sum
Elis [28]
24+40=64..
GFC 24&20=8 
64/8=8
is this what you were looking for?
8 0
3 years ago
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