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3 years ago

3x+2y=1 x+y=8 Solve for x and y. the equations correspond

Mathematics

1 answer:

sukhopar [10]3 years ago

4 0

3x + 2y = 1 -----1

x+y=8--------2

x=8 - y ------3

subs 3 into 1

3(8-y) + 2y=1

24-3y + 2y = 1

24-y = 1

-y= 1-24

-y= -23

y= 23

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A cone and 2 cylinders are shown below. The volume of the cone is 15 cubic centimeters. Each of the 2 cylinder has the same heig

shutvik [7]

Answer:

90 $cm^{3}$

Step-by-step explanation:

Given:

The volume of a cylinder =15 $cm^{3}$

Height of cone = Height of either cylinder

Radius of cone=Radius of either cylinder

Formula:

Volume of a cone = $\pi r^{2}h/3$

Volume of a cylinder = $\pi r^{2}h$

To find: Combined volume of both cylinders.

The volume of a cylinder =15 $cm^{3}$

$\pi r^{2}h/3$ =15 $cm^{3}$

$\pi r^{2}h$ =15 * 3 $cm^{3}$

$\pi r^{2}h$ =45 $cm^{3}$

[As

Height of cone = Height of either cylinder

Radius of cone=Radius of either cylinder]

$\pi r^{2}h$ =45 $cm^{3}$ is the volume of one cylinder.

Combined volume of cylinder = 2* Volume of cylinder = 2*45 =90 $cm^{3}$

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3 years ago

A bag contains red and blue marbles, such that the probability of drawing a blue marble is . An experiment consists of drawing a

nika2105 [10]

I think the answer is b but not sure

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3 years ago

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Justin is 2 years older than one third marcellas age. aimee is four years younger then 2 times Justins age.Define a variable and

dimaraw [331]

J=justin
marcella=m
aimee=a

j is 2 older than 1/3 of m
'of' means multiply
j=2+1/3m

a is 4 younger than 2 times j
a=-4+2j

represent justin's age?
dunno

ok so I can solve if I know m=63
j=2+1/3m
j=2+1/3(63)
j=2+21
j=23
subsitute
a=-4+2j
a=-4+2(23)
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3 years ago

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4 years ago

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Simplify to using laws of exponents (-2)^2(-2)^5

MAVERICK [17]

Answer:

-128