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3 years ago

12

What is 37 percent of 51?

2 answers:

Alik [6]3 years ago

8 0

Answer:

<h3>The answer is 18.87</h3>

Step-by-step explanation:

37 percent of 51 is written as

37/ 100 × 51

= 1887/100

= 18.87

Hope this helps you

alexdok [17]3 years ago

6 0

Answer:

18.87

Step-by-step explanation:

51 × (.37) = 18.87

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Why can't you compare 5 minutes in 240 seconds without making some kind of change

grin007 [14]

You have to have the same unit of measure. Here your units are "minutes" and "seconds". In order to compare the two, you must change to 240 seconds into minutes (dividing by 60 = 4 mins) OR change the 5 minutes into seconds (multiply by 60 to give you 300 seconds)

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3 years ago

The height of a triangle is 5 cm shorter than its base. If the area of the triangle is 25 cm2, find the height of the triangle.

Olin [163]

Answer:

$h = 5\ cm$

Step-by-step explanation:

Let's call B at the base of the triangle and call h at the height of the triangle. Then we know that:

The height of a triangle is 5 cm shorter than its base. This means that:

$h = B-5$ .

The area of the triangle is 25 cm²

By definition the area of a triangle is:

$A = 0.5Bh$

For this triangle we know that $A = 25\ cm^2$ and $h = B-5$ . We substitute these values in the equation and solve for B.

$25 = 0.5B (B-5)$

$0.5B ^ 2-\frac{5}{2}B-25 = 0$

Now we use the quadratic formula to solve the equation.

For an equation of the form $ax ^ 2 + bx + c = 0$ the quadratic formula is:

$B=\frac{-b\±\sqrt{b^2-4ac}}{2a}$

In this case note that: $a=0.5,\ \ b=-\frac{5}{2}\ \ c=-25$

Then:

$B=\frac{-(-\frac{5}{2})\±\sqrt{(-\frac{5}{2})^2-4(0.5)(-25)}}{2(0.5)}$

$B=\frac{\frac{5}{2}\±\sqrt{\frac{25}{4}+50}}{1}$

$B=\frac{5}{2}\±\frac{15}{2}$

The solutions are:

$B_1=\frac{5}{2}+\frac{15}{2}=10$

$B_2=\frac{5}{2}-\frac{15}{2}=-5$

For this problem we take the positive solution.

$B=10\ cm$

Now we substitute the value of B in the equation to find the height h

$h = 10-5$

$h = 5\ cm$

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3 years ago

Two numbers have these properties

EastWind [94]

Step-by-step explanation:

yea the answer us 8dj but u jejrjfjfjdjdjjfjfjcj

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3 years ago

You draw two marbles without replacement from a bag containing 2 green marbles and 3 black marbles. What are the possible outcom

Step2247 [10]

2 greens
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Hope this helps ;p have a nice day!

~pam

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3 years ago

An airplane company wants to make a model of an 87 foot airplane. The scale they are using is 2in=8ft. How many inches long with

aivan3 [116]

I think the correct answer is 10.875

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3 years ago