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PolarNik [594]
3 years ago
8

I need help with this math problem I have a picture that I can show you of what it is ​

Mathematics
1 answer:
steposvetlana [31]3 years ago
4 0
Hellllllllllllllllllllllllo
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Prove which of the following side lengths represents a right triangle?
olchik [2.2K]
The answer is b
A^2+b^2=c^2
9^2+12^2=15^2
81+144=225
6 0
3 years ago
Help with these 4 EQUATIONS . ( PLEASE SHOW WORK) WILL MARK AS BRAINLIEST
Kazeer [188]
8x+y=18
Y=3x-22
8x+3x-22=18
11x=40
X=40/11
Y=3×40/11-22
Y=-122/11
X=40/11
Y=-122/11

X+8y=17
X=y+8
Y+8+8y=17
9y=9
Y=1
X=1+8
X=9
Y=1


9x+y=58 Y=2x-8 9x+2x-8=58 11x=66 X=6 Y=2(6)-8 Y=12-8 Y=4 X=6
X+8y=21 X=2y+1 2y+1+8y=21 10y=20 Y=2 X=2 (2)+1 X=5 Y=2
3 0
3 years ago
A jar contains nine black buttons and four brown buttons. If nine buttons are picked
allsm [11]

Answer:

9/13

Step-by-step explanation:

Total = 9 + 4

= 13

Probability: 9/13

7 0
2 years ago
The volume of a cone with a height of 6 cm is 8 PI cubic centimeters. Which expression can be used to find r, the radius of the
timama [110]

Answer:

The correct option is D.

8π = 1/3 * π * (r)² * 6

Step-by-step explanation:

First of all to solve this problem we have to know the formula to calculate the volume of a cone

v = volume  = 8π

r = radius

h = height  = 6cm

π = pi

v = 1/3 * π * r² * h

we replace with the known values

8π = 1/3 * π * (r)² * 6

If we look at the options, the correct option is D.

6 0
3 years ago
"a u.S. 1-cent coin (a penny) has a diameter of 19 mm and a thickness of 1.5 mm". Assume the coin is made of pure copper, whose
choli [55]

<u>the question is </u> Calculate the value of the copper in the coin

Step 1

Find the volume of the coin

we know that

the volume of a cylinder is equal to

V=\pi r^{2}h

where

r is the radius of the coin

h is the thickness of the coin

in this problem we have

Diameter=19 mm=1.9 cm

r=D/2------> r=1.9/2=0.95 cm

h=1.5 mm=0.15 cm

substitute the values in the formula

V=\pi*0.95^{2}*0.15=0.425\ cm^{3}

Step 2

<u>Find the mass of copper in the coin</u>

we know that

the density is equal to

Density=mass/volume

Solve for the mass

mass=Density*volume

we have

Density=8.9\ gr/cm^{3}\\Volume=0.425\ cm^{3}

substitute in the formula

mass=8.9*0.425=3.785\ gr

Step 3

<u>Find the cost</u>

we know that

the market price of the copper is $2.15 per pound

1 pound=453.592 grams

convert gram to pounds

3.785 gr=3.785/453.592=0.0083 pounds

0.0083*$2.15=$0.018=$0.02

therefore

<u>the answer is</u>

$0.02

3 0
4 years ago
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