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Pavel [41]
3 years ago
10

Edgar used 10 x d to represent the number of pennies in d dollars. Is this reasonable?

Mathematics
2 answers:
Olegator [25]3 years ago
7 0
Yes that is reasonable
Molodets [167]3 years ago
3 0
Yes that is a reasonable answer.
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To calculate the area of a triangle, you find the product of the base and height and then divide by two
SIZIF [17.4K]

Answer:

True

Step-by-step explanation:

Hope this helps! :)

4 0
3 years ago
Pls help
KATRIN_1 [288]

Answer:

169.04 in² (nearest hundredth)

Step-by-step explanation:

Surface area of a cone = \pir² + \pirl

(where r = radius of the base and l = slant height)

Given slant height l = 10 and surface area = 188.5

Surface area  = \pir² + \pirl

188.5 = \pir² + 10\pir

\pir² + 10\pir - 188.5 = 0

r = \frac{-10\pi +\sqrt{(10\pi )^2-(4\times\pi \times-188.5)} }{2\pi } = 4.219621117...

Volume of a cone = (1/3)\pir²h

(where r = radius of the base and h = height)

We need to find an expression for h in terms of l using Pythagoras' Theorem a² + b² = c², where a = radius, b = height and c = slant height

r² + h² = l²

h² = l² - r²

h = √(l² - r²)

Therefore, substituting found expression for h:

volume of a cone = (1/3)\pir²√(l² - r²)

Given slant height l = 10 and r = 4.219621117...

volume = 169.0431969... = 169.04 in² (nearest hundredth)

5 0
3 years ago
Read 2 more answers
At a conference of 250 people, 20% of the participants are French, 35% are Americans, 5% are Germans, and the rest are of other
yanalaym [24]
20% of 250 people are french.

0.2 * 250 = 50 people. Hope this helps!
7 0
4 years ago
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142=10x+8x+2. Please show steps as well.​
mel-nik [20]

Answer:

x=7.78

Step-by-step explanation:

142=10x+8x+2

Move all numbers with the same variables to each side to separate them.

142-2=10x+8x

140=18x

Divide by 18.

x= 140/18

x=7.78

7 0
3 years ago
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Which expression is equivalent to (xy)z?<br>o (x+y)+z<br>O2z(xy)<br>O x(y+z)​
____ [38]

Answer:

the first one

Step-by-step explanation:

7 0
3 years ago
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