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Zielflug [23.3K]
3 years ago
13

Write and solve a proportion to answer the question.

Mathematics
1 answer:
svet-max [94.6K]3 years ago
6 0
A/78 = 25/100 . . . . the equation
a = 78*25/100 = 19.5

19.5 is 25% of 78
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Find the surface are of the cylinder in terms of pi
Andrej [43]
Hello!

To find the surface area of a cylinder you use the equation

SA = 2 \pi rh + 2 \pi  r^{2}

SA is surface area
r is radius
h is height

PUt in the values you know

SA = 2 \pi (7)(18) + 2 \pi  * 7^{2}

Square the number

SA = 2 \pi (7)(18) + 2 \pi * 49

Multiply 7 and 18

SA = 2 \pi * 126 + 2 \pi  * 49

Multiply 126 by 2

SA = 252 \pi  + 2 \pi  * 49

Multiply the 49 by 2

SA = 252 \pi  + 98 \pi

Add

SA = 350 \pi

The answer is A)350 \pi cm^{2}

Hope this helps!
7 0
3 years ago
You need to put a, b, c, d in the right four spots
Citrus2011 [14]

Answer:

A: Southeast

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D: Northeast

Step-by-step explanation:

8 0
2 years ago
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Using cubes and flats with the number 1,200
vfiekz [6]

A cube represents 1,000 and a flat 100. You can solve this problem by saying the number out loud. "One thousand, two hundred." That means that you need one thousand (cube) and two hundreds (flat). So one cube and two flats will be 1,000+100+100, which equals 1,200.

6 0
3 years ago
Where is the axis on a quadrant
dezoksy [38]

Answer:

x axis and y axis divide the coordinate plane into four quadrants.

Step-by-step explanation:

If one coordinate is zero, then the point is located on the x-axis or the y-axis. If y coordinate is zero, then the point is located on the y-axis. If both coordinates are zero, then the point represents the origin.

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Systems of equations substitution y=8 y=x+1
klemol [59]
(8) = x +1

same thing as 8 = 1x

divide both sides by 1 and x = 8 Y= 8
6 0
3 years ago
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