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faltersainse [42]
3 years ago
15

Please help me with this question

Mathematics
1 answer:
cricket20 [7]3 years ago
7 0
They give you: <RSP = 90 degrees

If you look in the diagram, <RSP is vertical to <UPW and vertical angles have the same measure. <RSP = <UPW

So the correct answer is A.
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Ratio And Proportion
Allushta [10]

Answer:

11200 for 7 engines for a total of 80 hours

Step-by-step explanation:

You have 8 engines burning 12000 .for 10 hours.

Divide 10 hours into 12000=1200 PER hour.

1200 ÷8 engines = 140 per hour per engine.

140 × # of hours (12)=1680 for 12 hours per engine.

# of engines × 1680 for 12 hour/per engine

5×1680 = 8400 of fuel for 12 hours/5 engine

Then you have 2 that runs 10 hours

2 × 140 per hour per engine =280 × 10 =2800 for 2 engines for 10 hours

8400. + 2800= 11200 of fuel for 6 engines

4 0
3 years ago
A 5-meter ladder is leaning against the side of a house. The foot of the ladder is pulled away from the house at a rate of 0.4 m
Flura [38]
<h2>The top of the ladder is descending at 0.3 m/s.</h2>

Step-by-step explanation:

By Pythagoras theorem we know that

              Hypotenuse² = Base² + Perpendicular²

                   h² = b² + p²

We have for ladder

                        h = 5 m

                        b = 3 m

                        5² = 3² + p²

                        p = 4 m

                        \frac{db}{dt}=0.4m/s\\\\\frac{dh}{dt}=0

Differentiating h² = b² + p² with respect to time

                    2h\times \frac{dh}{dt}=2b\times \frac{db}{dt}+2p\times \frac{dp}{dt}\\\\5\times 0=3\times 0.4+4\times \frac{dp}{dt}\\\\\frac{dp}{dt}=-0.3m/s

The top of the ladder is descending at 0.3 m/s.

3 0
3 years ago
Expand the following: -2(4a-6)<br><br> HELP PLEASEEEEEE!!!!!!!!!!!!!!!<br><br> 20 Points PLEASEEE
Dominik [7]

Answer:

-8a + 12

Step-by-step explanation:

-2(4a - 6)

-2(4a) - -2(6)

-8a - -12

-8a + 12

6 0
3 years ago
Read 2 more answers
Petrol and oil are mixed in the ratio 10/1 . How many litres of oil needed to mix with 5 litres of petrol?
valina [46]

Answer:

1/2

Step-by-step explanation:

since 10petrols=1 oil

therefore 5petrols=1/2

7 0
3 years ago
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What is the slope of (13,2) (-14,-16)
velikii [3]
Well you have to remember to find the slope you have to use Y2-Y1 over X2-X1 so your answer will be -14 over 1
7 0
3 years ago
Read 2 more answers
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