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3 years ago

Y = x + 2 2x - y = -4

Mathematics

1 answer:

mrs_skeptik [129]3 years ago

3 0

1.) X=-2

2.) 2x-y+4=0

Hope this helps! :))

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A rectangular pool 18 meters by 12 meters is surrounded by a walkway of width x

vesna_86 [32]

Answer:

x=3 meters

Step-by-step explanation:

step 1

Find the area of the rectangular pool

$A=LW$

we have

$L=18\ m\\W=12\ m$

substitute

$A=18(12)=216\ m^2$

step 2

Find the area of rectangular pool including the area of the walkway

Let

x ----> the width of the walkway

we have

$L=(18+2x)\ m\\W=(12+2x)\ m$

substitute

$A=(18+2x)(12+2x)$

step 3

Find the area of the walkway

To find out the area of the walkway subtract the area of the pool from the area of rectangular pool including the area of the walkway

$A=(18+2x)(12+2x)-216$

step 4

Find the value of x if the area of the walkway equal the area of the pool

$(18+2x)(12+2x)-216=216$

Solve for x

$(18+2x)(12+2x)=432\\216+36x+24x+4x^{2}=432\\4x^{2} +60x-216=0$

Solve the quadratic equation by graphing

The solution is x=3 meters

see the attached figure

8 0

4 years ago

What would be the slope intercept form for the inequality 3 x − 2 y > 5 ?

tensa zangetsu [6.8K]

Answer:

y < 3/2x - 5/2 or y < 3/2 x - 2.5

Step-by-step explanation:

3x -2y > 5

Solve for y

3x - 2y > 5 when solving a problem with an inequality sign, rewrite the problem and solve with an equal sign and add the equality at the end.

3x - 2y = 5

-2y = -3x + 5

y = -3/-2x+ 5/-2

y = 3/2x - 2 1/2

Now if you have to use the inequality sign, you will use < because the y term was negative and that will change the direction of the inequality sign.

So y < 3/2x - 5/2 or y < 3/2 x - 2.5

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3 years ago

Can any one help me??????

stepan [7]

First One! All you have to do is count the example and see if there is a match!

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3 years ago

Simplify the following radicals (in exponential notation) (x^9y^6z^15)^1/3

MAVERICK [17]

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4 years ago

9. On election day, registered voters go to a polling place to cast their vote. a. In a town, 273,600 votes were cast in an elec

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9.) 155,952 were in town
B.) yes he is correct because 60%= 164,160 which is less than the amount of votes

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