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aleksandrvk [35]
2 years ago
15

A train goes at a constant speed. If it covers 150 miles in 2/1 2 hours,

Mathematics
1 answer:
riadik2000 [5.3K]2 years ago
3 0

Answer:

x =4.5 hours

Step-by-step explanation:

We can use ratios to solve

150 miles        270 miles

--------------- = --------------

2.5 hours      x miles

150 *x = 270*2.5

Divide each side by 150

150x/150 = 270*2.5/150

x =4.5 hours

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?? please help with this
mestny [16]

Answer:

The Third one

Step-by-step explanation:

Because the y is not included in the function ( see some lines ) and x is the same thing but it is larger than -3 and it is included in the function .

I hope that it's a clear solution and explanation.

6 0
3 years ago
Find the lateral area of a cylinder with the given measurements. Use 3.14 for π and round your answer to the nearest tenth. Heig
Zolol [24]

Answer:Lateral surface area is 847.8 centimeters^2

Step-by-step explanation:

The formula for determining the lateral surface area of a cylinder is expressed as

Lateral surface area = 2πrh

Where

r = radius of the cylinder

h = the height of the cylinder

From the information given,

r = 9 centimeters

h = 15 centimeters

π = 3.14

Lateral surface area = 2 × 3.14 × 9 × 15 = 847.8 centimeters^2

6 0
3 years ago
Read 2 more answers
The standard golf ball has a mass of 45g. How many golf balls are there in a bag weighing 1.8kg?
Butoxors [25]
This is a working backwards question.
Since the golf ball was 45g, and the bag was 1.8kg,we need to make them the same units.
45g= 0.45kg
1.8kg= 1.8kg

Now that the units are the same, we put it in a calculator.


1.8÷0.45= 4

Therefore, there are 4 golf balls in the bags.
We can check this by doing 4×0.45= 1.8

Hope this helped!

4 0
3 years ago
Read 2 more answers
The rate (in liters per minute) at which water drains from a tank is recorded at half-minute intervals. Use the average of the l
kvv77 [185]

Answer:

100.75 liters

Step-by-step explanation:

Data provided in the question:

t (min)     0     0.5      1     1.5      2      2.5      3

r (l/min)    44    40     37     34     30     27      23

Now,

left endpoint approximation

= 0.5 × ( 44 + 40 + 37 + 34 + 30 + 27 )

= 0.5 × 212

= 106

Right endpoint approximation

= 0.5 × ( 40 + 37 + 34 + 30 + 27 + 23 )

= 0.5 × 191

= 95.5

Therefore,

the average of the left- and right-endpoint approximations

= [ 106 + 95.5 ] ÷ 2

= 100.75 liters

3 0
3 years ago
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