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ziro4ka [17]
3 years ago
11

In a high school, 7% of the students play the piano. This is 21 students. Choose the expressions that complete each step involve

d in setting up and solving the proportion that represents the situation.
Set up a proportion:

Cross multiply:
Mathematics
1 answer:
Gnesinka [82]3 years ago
7 0

Hello,

<u>Set up a proportion</u> :

7 → 21

100 → ?

<u>Cross multiply</u> :

100 * 21 / 7 = 300 students

Bye :)

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What is the value of 1/4 to the power of 3
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Answer:

1/64

Step-by-step explanation:

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Find the value of 5x and 3x+60
Lerok [7]

Answer:0 and -20

Step-by-step explanation:

5x=0;

x=0/5.

3x+60=0;

3x= -60;

x= -60/3;

x= -20

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Convert 2.4 kg into cg. Please show your work.
Sphinxa [80]
1 kg = 1000 g
1 cg = (1/100) g

2.4 kg
2.4 * 1000 g
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2400/100 cg
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3 years ago
An aquarium 5 ft long, 3 ft wide, and 5 ft deep is full of water. (Recall that the weight density of water is 62.5 lb/ft3.) (a)
Cerrena [4.2K]

Answer:

a) hydrostatic pressure at bottom = 10054.375 lb/ft-s2

b) hydrostatic force at bottom = 150815.625 lb-ft/s2

c) hydrostatic force at one end of aquarium = o

Step-by-step explanation:

Detailed explanation and calculation is shown in the image below

8 0
3 years ago
Read 2 more answers
Find the perimeter of the following triangle.
pashok25 [27]

Hello!

To find the perimeter of the triangle, we need to find the length of all the sides using the <u>distance formula</u>.

The distance formula is: d =\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}.

First, we can find the distance between the points (-3, -1) and (2, -1). The point (-3, -1) can be assigned to (x_{1},y_{1}), and (2, -1) is assigned to (x_{2},y_{2}). Then, substitute the values into the formula.

d =\sqrt{(2 - (-3))^{2}+ (-1 - (-1))^{2}}

d =\sqrt{5^{2}+0^{2}}

d =\sqrt{25} = 5

The distance between the points (-3, -1) and (2, -1) is 5 units.

Secondly, we need to find the distance between the points (2, 3) and (2, -1). Assign those points to (x_{1},y_{1}) and (x_{2},y_{2}), then substitute it into the formula.

d =\sqrt{(2 - 2)^{2}+ (-1 - 3)^{2}}

d =\sqrt{0^{2}+(-4)^{2}}

d =\sqrt{16} = 4

The distance between the two points (2, 3) and (2, -1) is 4 units.

Finally, we use the distance formula again to find the distance between the points (-3, -1) and (2, 3). Remember the assign the ordered pairs to (x_{1},y_{1}) and (x_{2},y_{2}) and substitute!

d =\sqrt{(2 -(-3))^{2}+ (3 - (-1))^{2}}

d =\sqrt{5^{2}+4^{2}}

d =\sqrt{25 + 16}

d =\sqrt{41} This is equal to approximately 6.40 units.

The last step is to find the perimeter. To find the perimeter, add of the three sides of the triangle together.

P = 5 units + 4 units + 6.4 units

P = 15.4 units

Therefore, the perimeter of this triangle is choice A, 15.4.

6 0
3 years ago
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