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2 years ago

Solve the system of linear equations by elimination −2x+3y=7 and 5x+8y=−2

1 answer:

4 0

You would need to make them eliminate so I would multiply the entire first one by 2.5 to make the X's cancel out. So you would end up with -5X+7.5Y=17.5. The X's would cancel and you would be left with 15.5Y=15.5. So Y=1. Then replace Y into one of the equations. I'm going to use the top again. -2X+3(1)=7. Subtract 3 from both sides to get -2x=4. Divide both sides by negative 2 to get X=-2. So the solution would be (-2,1)

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Please help me someone plz I really need help I would appreciate it if someone would reach out 2 me and try 2 help

serious [3.7K]

Answer:

Purple Cylinder

Step-by-step explanation:

You are given the equation for the volume of a cylinder, which is: $r^2h\pi$ , where r is the radius of the cylinder and h is the height.

We are given both the height and radius of each cylinder in the question, therefore we can work out the volume of each of them.

Purple Cylinder:

Radius given = 2

Height given = 2

$V=(2)^2(2)\pi =(4)(2)\pi =8\pi$ , so the volume of the purple cylinder is $8\pi$ .

Green Cylinder:

Radius given = 1

Height given = 6

$V=(1)^2(6)\pi =(1)(6)\pi =6\pi$ , so the volume of the green cylinder is $6\pi$ .

Now let's compare the volumes: $8\pi >6\pi$ . $8\pi$ is larger than $6\pi$ so the volume of the purple cylinder is greater than the volume of the green cylinder.

8 0

2 years ago

Be first to answer! :)

Bas_tet [7]

Answer:

2x + 200 = 6x + 120

Step-by-step explanation:

Super-Clean house cleaning company: 2x + 200

Power Bright: 6x + 120

Now, they have to be equal because we are trying to find the equation for total charges.

So, your equation would be 2x + 200 = 6x + 120.

Hope this helps!

5 0

2 years ago

Read 2 more answers

Find the slope of the line

Sergio039 [100]

Answer:

A) 2

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

The length of Rebecca’s rectangular garden was two times the width “w”. She increased the length and width of the garden so that

Damm [24]

Answer:

rebecca increased the length by 3 and the width by 2

Step-by-step explanation:

First we need to find the length and width by factorizing the expressio ofr the area;

A = 2w^2+7w+6

A = 2w^2+4w+3w+6

A = 2w(w+2)+3(w+2)

A = (2w+3)(w+2)

Since l = 2w

Length = 2w+3

width = w+2

This shows that rebecca increased the length by 3 and the width by 2

6 0

2 years ago

What is the value of k when the expression 3(7 + x) is equivalent 3(x + k)

Free_Kalibri [48]

Answer:7

Step-by-step explanation:

8 0

2 years ago