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Butoxors [25]
3 years ago
7

A child throws a ball up in the air to a height of 3.5 m and catches it at the same point from which he threw it. The ball is in

the air for a total of 1.7 s. What is the average velocity of the ball?
Mathematics
1 answer:
dimaraw [331]3 years ago
5 0
S = 3,5 + 3,5 = 7 m \\ V =  \frac{\triangle S}{\triangle T} =  \frac{7}{1,7}  \approx 4,12  \frac{m}{s}
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3 years ago
Find the lateral area for the pyramid with the equilateral base.
Dafna11 [192]

Answer:

Option A is the correct answer.

Explanation:

 The given pyramid has 3 lateral triangular side as shown below.

 Base of triangle = 12 unit

 We need to find perpendicular.

  By Pythagoras theorem we have

            Perpendicular² = 10²-6²

           Perpendicular = 8 unit

So area of 1 lateral triangle = 1/2 x Base x Perpendicular.

                                             = 1/2 x 12 x 8 = 48 unit²

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7 0
3 years ago
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Troyanec [42]
Hard to read sideways but what I got from that is that you have a right triangle and you are trying to explain the other angles? 
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6 0
3 years ago
A car dealership sells suv's and passenger cars. For a recent year, 90 more suv's were sold than passenger cars. If a total of 5
Lunna [17]

Answer:

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Step-by-step explanation:

Let S denote the amount of SUVs sold and let P denote the amount of passenger cars sold.

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90 more SUVs were sold than passenger cars. In other words:

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We know have a system of equations. We can solve it buy substituting the second equation into the first. Thus:

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Combine like terms:

2P+90=510

Subtract 90 from both sides:

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Divide both sides by 2:

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So, the 210 passenger cars were sold.

This means that 210+90=300 SUVs were sold.

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7 0
3 years ago
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likoan [24]

Answer:

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Step-by-step explanation:

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Take it times two.

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Proportion

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Cross multiply and solve for x.

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