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icang [17]
3 years ago
15

The solution shown for the equation is

Mathematics
1 answer:
DaniilM [7]3 years ago
8 0

Answer:

-3(6-r) = 9

- 18 - 3r = 9   incorrect: should be -18 +3r = 9

- 3r = 27       incorrect: should be 3r = 27

9                   actually correct: r = 9

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A gas station stores its gasoline in a tank under the ground. The tank is a cylinder lying horizontally on its side. (In other w
hoa [83]

Answer:

64,717.36 Joule is the total amount of work needed to pump the gasoline out of the tank.

Step-by-step explanation:

Volume of cylinder = V

Radius of cylinder = r = 0.5 m

Height of the cylinder = 5 m

Volume of cylinder = \pi r^2h

V=3.14\times (0.5 m)^2\times 5 =3.925 m^3

Mass of gasoline = m

Density of gasoline = d = 673 kg/m^3

m=d\times V=673 kg/m^3\times 3.925 m^3=2,641.525 kg

Work done to pump the gasoline out of the tank W

Acceleration due to gravity = g .8 m/s^2

The center of gravity of fuel in fully filled tank will be centre so, the value of h = 2 m + 0.5 m = 2.5 m

W =m\times g\times h

W=2,641.525 kg\times 9.8 m/s^2\times 2.5 m=64,717.36 J

64,717.36 Joule is the total amount of work needed to pump the gasoline out of the tank.

6 0
3 years ago
A map has a scale of 1 inch = 3 miles. Which of the following scales is equivalent?
tankabanditka [31]
12 inch=36 miles because if you multiply 11 x 3 you get 36 miles.
3 0
2 years ago
Read 2 more answers
If f(x)=2x-5, which expression represents f(x+1)? A) 2x-3, B) 2x-4, C)2x-5, D)2x+7
Dovator [93]
F(x)=x^2+2x+1 & g(x)=3(x+1)^2
now, f(x)+g(x)
=x^2+2x+1+3(x+1)^2
=x^2+2x+1+3(x^2+2x+1)
=x^2+2x+1+3x^2+6x+3
=4x^2+8x+4<===answer(c)
next:
f(x)=x^2-1 & g(x)=x+3
now, f(g(x))=(x+3)^ -1
=x^2+6x+9-1
=x^2+6x+8<====answer(b)
i solve two of ur problems.
now try the 3rd one that is similar to no. 1
and try the last two urself.
5 0
3 years ago
Heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeelp
Inessa [10]

Step-by-step explanation:

1.

true

false

false

true

2.

yes

no

yes

no

yes

3.

A

4.

7,5 $

6 0
2 years ago
Three children together have 50 toys,Harry has 10 less toys than Mark. Sue has twice as many toys as Harry. How many toys does e
Alexeev081 [22]

Answer:

Harry = 10 toys

Mark = 20 toys

Sue = 20 toys

Step-by-step explanation:

H + M + S = 50

H = M - 10

S = 2H

Harry = 10 toys

Mark = 20 toys

Sue = 20 toys

5 0
3 years ago
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