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3 years ago

Elimination using addition and subtraction -3x - y = 24 ; 3x - 2y = 3

Mathematics

2 answers:

Usimov [2.4K]3 years ago

7 0

Answer:

(5,-9)

Step-by-step explanation:

-3x-y=24

3x-2y=3

eliminate the x values and then you have -3y=27

Then you get y=-9; you have to plug the y back in to an equation

-3x-2(-9)=3

-3x+18=3

-3x=-15

x=5

lozanna [386]3 years ago

5 0

Answer:

x=5

y=6

Step-by-step explanation:

this may be wrong

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A sphere and a cylinder have the same radius and height. The volume of the cylinder is 27 xft?

attashe74 [19]

Answer:

Volume of sphere = $\frac{2}{3}(27\pi) ft^3$

Step-by-step explanation:

We are given that

Radius of sphere=Radius of cylinder=r

Height of sphere=Height of cylinder=h

Height of sphere=h=Diameter of sphere=2r

Volume of cylinder= $27\pi ft^3$

Volume of cylinder= $\pi r^2 h$

Using the formula

Volume of cylinder= $\pi r^2(2r)=2\pi r^3=27\pi$

Volume of sphere= $\frac{4}{3}\pi r^3$

Using the formula

Volume of sphere= $\frac{2}{3}\times 2\pi r^3=\frac{2}{3}(27\pi)$

Hence, the volume of sphere = $\frac{2}{3}(27\pi) ft^3$

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