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Alexus [3.1K]
2 years ago
13

A train is traveling at 60 mph. If the rate of speed increases 4 mph each hour,

Mathematics
1 answer:
Alenkasestr [34]2 years ago
6 0

Answer:

B) 5 hours

Step-by-step explanation:

First, find the amount of mph between 60 and 80:

80 - 60

= 20 mph

Since the speed increases 4 mph per hour, we can find how long it will take to get to 80 mph by dividing 20 by 4:

20/4

= 5

So, the correct answer is B, 5 hours

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Factorise completely 3m^2-48​
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Answer:

3 (m^2 - 16)

Step-by-step explanation:

factoring means taking out a common multiple of all the terms in the expression

in this case, if you multiply 3 and m^2, 3 and -16, you would get 3m^2-48​

so you take the three and put it outside of the parenthesis that contains the factored terms

this leaves you with 3 (m^2 - 16)

3 0
2 years ago
In a field, dry fodder for the cattle is heaped in a
ipn [44]

Answer:

volume of fodder=1/3pie R^2h=\frac{1}{3} *\frac{22}{7} * (3.6)^2 *2.1=28.51m^3

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l^2=(2.1)^2+(3.6)^2

l^2=4.441+12.96=17.37

l=\sqrt{17.37}=4.17m

minimum area of polythene to cover fodder=pieRl=\frac{22}{7} *3.6*4.17=47.18m^2

the volume of fodder is 28.51m^3 and minimum area of polythene to cover fodder in the  rainy seasonv47.18m^3

3 0
2 years ago
2x−y=5 If x=4, then y=
jeka94

Answer:

Y = 3

Step-by-step explanation:

2(4) = 8

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-y = -3

Y=3

4 0
2 years ago
Which ordered pair is a solution of the system of equations?
levacccp [35]
{y=3x+1 |*5
{y=5x-3 |*(-3)

{5y=15x+5
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+___________
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{y=7
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The answer: C

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3 years ago
If a call started at 7:53 and ends at 8:25.<br> How long did the call last?
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Answer:

33 minutes

Step-by-step explanation:

33min

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2 years ago
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