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nekit [7.7K]
3 years ago
12

Write the expression as a decimal number.

Mathematics
1 answer:
Nesterboy [21]3 years ago
4 0
The answer would be 66.7
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20 POINTS AND BRAINLIEST FOR CORRECT ANSWER! A cone with height h and radius r has volume V = 13πr2h. If a certain cone with a h
lozanna [386]

Answer:

If a certain cone with a height of 9 inches has volume V = 3πx2 + 42πx + 147π, what is the cone’s radius r in terms of x?

Step-by-step explanation:

V = 3πx2 + 42πx + 147π

V=3π(x2 + 14x +49)

9.42(x2 + 14x +49)

9.42(x2 + 14x +14)  -14 + 49= 0

9.42(x + 7)^2 + 35= 0

9.42(9.42(x + 7)^2 = - 35)9.42

(x + 7)^2 = - 35/9.42)

√(x + 7)^2=√- 35/9.42

x + 7 = - 1.927

x= - 1.927 - 7

x= - 8.927

V = 3π(- 8.927)^2 + 42π(- 8.927) + 147π

V=750.69 - 1177.29 + 461.58

<u>V=34.98</u>

h= 9 inches

V = 13πr2h

34.98 = 13(3.14) (r^2) (h)

34.98 = 40.82 (r^2) 9

34.98 = 367.38 r^2

34.98/ 367.38 = 367.38 r^2/ 367.38

0.095=  r^2  

3 0
3 years ago
You have 3 friends pay $26.55for a pizza and 4 of the same kind of drinks. The pizza cost $18.75. Write and solve an equation to
Kazeer [188]
Well... how about pay the cost and enjoy the pizza and drinks.
6 0
3 years ago
What is 8+9 pllllllllllllssssssssssssssssssssssssss
KiRa [710]

Answer:

17

Step-by-step explanation:

8+9 is 17

5 0
3 years ago
Read 2 more answers
What is Rational Number​
abruzzese [7]
Rational number, in arithmetic, a number that can be represented as the quotient p/q of two integers such that q ≠ 0. In addition to all the fractions, the set of rational numbers includes all the integers, each of which can be written as a quotient with the integer as the numerator and 1 as the denominator.
8 0
2 years ago
Read 2 more answers
Evaluate 23x + 4y when x=20 and y=23
never [62]

Answer:

552

Step-by-step explanation:

23x + 4y when x=20 and y=23

if x=20 and y=23 all you have to do is replace the numbers and solve

23(20) + 4(23)

Multiply 23*20 which is equal to 460

Then you multiply 4*23 which is equal to 92

The problem is now 460 + 92

add it, and you get 552.

Hope this helps!!

-Ketifa

3 0
3 years ago
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