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Serga [27]
3 years ago
14

What is the value of X in the figure below? In this diagram.

Mathematics
1 answer:
kipiarov [429]3 years ago
3 0
<h3>Answer:  E.  45/4</h3>

===========================================

Work Shown:

Because we have similar triangles, we can form the proportion below to isolate x.

(AC)/(BC) = (CD)/(AC)

(15)/(20) = (x)/(15)

15*15 = 20x .... cross multiply

225 = 20x

20x = 225

x = 225/20

x = (5*45)/(5*4)

x = 45/4

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Find the volume of a cone with radius 4 inches and height 5 inches. Round your answer to two decimal places
faltersainse [42]

Answer:

Volume of the cone = 83.73 cubic inches

Step-by-step explanation:

Given:

          Radius of the cone= 4 inches

           Height of the cone= 5 inches

Volume of a cone(V) :  

                                     \pi *r^2*\frac{h}{3}

Putting the given values in the formula:

               Volume of the cone:

                                3.14*4*4*\frac{5 }{3}                                           :\pi =\frac{22}{7} =3.14

                                 16*3.14*\frac{5}{3}

                                 83.73  cubic inches

So, the volume of the cone up to two decimal places is 83.73  cubic inches

3 0
3 years ago
4x + 5y = 7
Papessa [141]
Not sure if I’m understanding this wrong but for x you can multiply the top equation by -3 to get -12x-15y=-21 and the bottom by 4 to get 12x-8y=-48.
For y you can multiply the top equation by 2 to get 8x+10y=14 and the bottom equation by 5 to get 15x-10y=-60
8 0
3 years ago
Solve x/3 = x+2/2. X=
Leni [432]

Answer:

I will assume that the term "x+2/2" is meant to be "(x + 2)/2)."  Otherwise the equation would read (x/3) = x + 1

Step-by-step explanation:

(x/3) = (x + 2)/2

x = 3*(x+2)/2   [Multiply both sides by 3]

x = (3x + 6)/2

x = (3/2)x + 6/2

x - (3/2)x = 3

-0.5x = 3

x = -6

====================

Check:

Does (x/3) = (x + 2)/2 for x = -6?

(-6/3) = (-6 + 2)/2

-2 = -4/2

-2 = -2  YES

6 0
2 years ago
I am confused on how to do this? please help!
IceJOKER [234]
You would take random numbers preferable smaller ones such as -1,0,1,2
You would put those in the place of x
Then you would square the value of x. After that you subtract 4. Whatever you come out with is your y value. Then you put the x value on the x axis and from that point count up or down to the number you need on the y axis. Together that would be your point
6 0
3 years ago
Suppose a virus splits into two every 45 minutes how many viruses are there after 5 hours 15 minutes
sergij07 [2.7K]

Answer:

14

Step-by-step explanation:

1 hour = 60 minutes

5*60=300 minutes

300+15 minutes

315/45

7*2=14

....................................................

3 0
3 years ago
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