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Angelina_Jolie [31]
2 years ago
11

Today, there were 3 students absent from the math class. Each students that attended school solved 17 equations in math class. A

t the end of the class the teacher told the students that together they solved 408 equations today. How many students are this class if no one is absent?
Mathematics
1 answer:
nika2105 [10]2 years ago
7 0

Answer:

  • 27 students

Step-by-step explanation:

<u>Number of students present in the math class:</u>

  • 408/17 = 24

<u>Number of students in this class:</u>

  • 24 + 3 = 27
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of the 50 U.S states, 4 have names that start with the letter W. What percentage of U.S. states have names that start with the l
serious [3.7K]

Answer:

8% of of the Us states have the names that start with W.

Step-by-step explanation:

We are told that, of the 50 states, 4 have names that start with letter W, and to figure out what percentage of U.S. states have names that start with the letter W, we need to know what what 4 is what percent of 50.

We figure this out the following way:

Percent = \frac{4}{50} *100=0.08*100 =8

Percent = 8%

6 0
3 years ago
If water and oil are combined in a container, the resulting liquid is a(n)
xenn [34]
<span>If water and oil are combined in a container, the resulting liquid is a(n) C) emulsion

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3 0
3 years ago
What’s the radius, circumference, and area?
Ivenika [448]

Answer:

Radius: 19 yards

Diameter: 38 yards

Circumference: 119. 32

Step-by-step explanation:

Radius

To find the radius you divide the diameter by 2 because, the diameter is a; a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.

So 38 ÷ 2 = 19

So the radius is 19.

_____________________

Circumference

To find the Circumference you need to do 2·π·19

C=2·π

2·π = 6.28

6.28 · 19 = 119. 32

Circumference is 119. 32

8 0
2 years ago
A cylindrical package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross section)
dolphi86 [110]

Answer:

radius r = 47/π in

length l = 23.5 in

Step-by-step explanation:

Let us recall that:

Volume of a cylinder = \pi r^2 h --- (1)

The girth g = 2 \pi r + h      ----- (2)

Given that:

height (h) + girth (g) = 141

Then g = 141 - h   ----- (3)

Equating equation (2) and (3), we have:

141 - h = 2πr + h

2h = 141 - 2πr

h = 70.5 - πr      ------ (4)

From, here now, we can now replace the value of h into equation (1)

i.e.

V = πr²(70.5 - πr)

V = 70.5πr² -  π²r³

Taking the differential of the above equation with respect to r, we have:

\dfrac{dv}{dr} = 141 \pi r- 3\pi ^2 r^2

By further differentiation:

\dfrac{d^2v}{dr^2} = 141 \pi - 6\pi ^2 r

Let set \dfrac{dv}{dr}= 0, Then:

141πr - 3π²r² = 0

141πr = 3π²r²

Divide both sides by πr

141 = 3πr

r = 141/3π

r = 47/π in

Replacing the value of r = 47/π into equation (4), we have:

h = 70.5 - πr

h = 70.5 - π(47/π)

h = 70.5 - 47

h = 23.5 in

From equation (3);

h + g = 141

23.5 + g = 141

g = 141 - 23.5

g = 117.5 in

Volume = πr²h

V = π × (47/π )² × 23.5

V = 16523.94 in³

4 0
2 years ago
16+(18+10)=(x+18)+10
sasho [114]
16 + 18 + 10 = 44
44 = x + 28
16 = x
x = 16
4 0
2 years ago
Read 2 more answers
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