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Ghella [55]
2 years ago
11

A car rental company charges a $50 flat fee and an additional $20 per day. A

Mathematics
2 answers:
Mumz [18]2 years ago
6 0

Answer:15

Step-by-step explanation:

Likurg_2 [28]2 years ago
5 0

Answer:

What is the question

Step-by-step explanation:

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Jo bought a used car for $6000 and paid a 15% deposit. How much did he still have to pay?
astraxan [27]

Answer:

900 is the correct awnser

6 0
2 years ago
Planners of an experiment are evaluating the design of a sphere of radius r that is to be filled with helium (0°c, 1 atm pressur
Vikentia [17]
The solution is:A mole of gas occupies 22.4 L A liter is 1000 cubic centimeters because 1 cubic centimeter = 1 mL
One Helium molecule (essentially one helium atom) has atomic mass 4 g/mol So for every 22400 cubic centimeters of volume, we have 4 grams of helium Density of helium = 4g / 22400 cm^3 = 1g / 5600 cm^3 
Volume of a sphere = (4/3)(pi)r^3 Volume of the outside sphere (the entire sphere) is (4/3)(pi)(R+T)^3 Volume of the inside sphere (the hollow region) is (4/3)(pi)R^3 
The difference for the volume of silver. (4/3)(pi)(R+T)^3 - (4/3)(pi)R^3 = (4/3)(pi)(3R^2T + 3RT^2 + T^3) 
The density of silver is 10.5g/cm^3 
So the mass of the silver is computed by:10.5*(4/3)(pi)(3R^2T + 3RT^2 + T^3) = (14*pi)(3R^2T + 3RT^2 + T^3) = (14pi)T(3R^2 + 3RT + T^2) 

Now for the mass of helium: volume x density = (4/3)(pi)R^3 (1/5600) = (pi/4200)R^3 

Set the two masses equal: (pi/4200)R^3 = (14pi)T(3R^2 + 3RT + T^2) R^3 = 58800*T(3R^2 + 3RT + T^2) R / T = 58800*(3R^2 + 3RT + T^2) / R^2 = 58800*( 3+T/R^2+(T/R)^2) 
then solve for xx = T / R 1/x = 58800*( 3+x/R+x^2) 1/58800 = x (3 + x/R + x^2) 1/58800 = 3x + x^3 x^3 + 3x - 1/58800= 0 x = ~ 5.66893x10^(-6)
6 0
3 years ago
A bookstore sells used books for $8 each. Let n represent the number of books. The cost for n books is 8 xn or 8n.
zalisa [80]
The unknown quantity is the books
6 0
2 years ago
How do I solve −6 + 9(8 − 2b) using distributive property or combining like terms.
Levart [38]

Answer:

66-18b

Step-by-step explanation:

-6+72-18b

66-18b

solving for b

b=3.66 or 3 and 2/3

7 0
3 years ago
HELP PLLSS<br> 92;69<br> work included!
Nata [24]

Answer:

92/69 cannot be simplified

Step-by-step explanation:

8 0
3 years ago
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