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3 years ago

How do you do 20 / 4/5

Mathematics

2 answers:

Flauer [41]3 years ago

4 0

What do you mean by this

tamaranim1 [39]3 years ago

4 0

Answer:

Step-by-step explanation:

you can write this equation as 20 ÷ $\frac{4}{5}$

so change the division sign to multiplication by flipping the divisor ( $\frac{4}{5}$ )

this means you now have 20 x $\frac{5}{4}$

so you can simplify 20 and 4, this makes the 4 into a 1 and the 20 into a 5

you now have 5 x $\frac{5}{1}$

this is the same thing as 5 x 5

multiply it, and you can see that the answer is 25

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What is the value of x?

Ray Of Light [21]

The Pythagorean Theorem states that a^2+b^2=c^2
We already have:
A^2+6^2=117
All we need to do is find the missing A by subtract b from c.
117-36=81
Now the square root of 81, 9.
So, x is 9 cm.

6 0

3 years ago

If an object is dropped from a height of 144 feet, the function h(t)=-16t^2+144 gives the height of the object after t seconds.

shtirl [24]

Answer:

A. 3s

Step-by-step explanation:

The height of the object after t seconds is given by:

$h(t) = -16t^2 + 144$

When will the object hit the ground?

It hits the ground after t seconds, and t is found when $h(t) = 0$ . So

$h(t) = -16t^2 + 144$

$0 = -16t^2 + 144$

$16t^2 = 144$

$t^2 = \frac{144}{16}$

$t^2 = 9$

$t = \sqrt{9}$

$t = 3$

3 seconds, so the correct answer is given by option a.

5 0

3 years ago

From the top of a tower, an object which is 97 m away from the base of the tower, is at a 37° angle of depression.

mario62 [17]

<h3>Answer: 73</h3>

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Work Shown:

Check out the diagram below. Note the pair of alternate interior angles that are congruent (each 37 degrees). Then focus on triangle ABC. With the reference angle being at A, this means we use the tangent function because BC = x is the opposite side and AB = 97 is the adjacent side.

tan(angle) = opposite/adjacent

tan(A) = BC/AB

tan(37) = x/97

97*tan(37) = x

x = 97*tan(37)

x = 73.094742859971

For the last step, you'll need a calculator that can handle trig functions. Make sure the calculator is in degree mode. The result here is approximate. This rounds to 73 when rounding to the nearest whole number.