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Ilya [14]
2 years ago
14

Solve this system of equations by

Mathematics
2 answers:
timofeeve [1]2 years ago
8 0

Answer:

(12 , -8)

Step-by-step explanation:

<h2>Solving system of equation:</h2><h3>    Elimination method</h3>

                x + y = 4 ---------------(I)

              4x + 3y = 24 ---------------------(II)

Multiply equation (I) by (-4) and then add the equations. By doing this, 'x' will be eliminated and we can find the value of 'y'.

(I) *(-4)           -4x - 4y = -16

(II)                <u>   4x + 3y = 24 </u>   {Now add}

                             -y   = 8

                              y   = 8/(-1)

         \boxed{y = -8}

Plugin y =-8 in any of the equations. Here , we are going to plugin  equation (I)

        x + (-8) = 4

            x - 8 = 4

                  x = 4 + 8

           \boxed{x = 12}

Goshia [24]2 years ago
6 0
Answer: x = 12 and y = -8

Explanation:
x + y = 4
4x + 3y = 24
———————
-3(x + y = 4)
4x + 3y = 24
———————-
-3x - 3y = -12
4x + 3y = 24
———————
x = 12

If x = 12
x + y = 4
12 + y = 4
y = -8
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A chemist is using 333 milliliters of a solution of acid and water. If 19.6% of the solution is acid, how many milliliters of ac
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65.27mm of acid is present in solution.

Step-by-step explanation:

Given,

Quantity of solution = 333mm

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65.27mm of acid is present in solution.

Keywords: Percentage

Learn more about percentages at:

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3 years ago
Each cone of the hourglass has a height of 12 millimeters. The total height of the sand within the top portion of the hourglass
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The solution would be like this for this specific problem:

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If the top half is filled with sand, then:

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It will take 62.4 seconds until all of the sand has dripped to the bottom of the hourglass.

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3 years ago
A game shop sells marbles in clear plastic cylinders. Four marbles fit across the diameter of the cylinder and 10 marbles fit fr
slega [8]
To start, you know that this question is asking for the surface area of one of the cylinders, and the formula to finding the surface area of a cylinder is A=2πrh+2<span>πr^2.

Now, to find the surface area, you first need to figure out the height of the plastic cylinder and its radius. 
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Since you now have the values of the height and the radius, plug the values into the surface area of a cylinder formula (r is radius and h is height).
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</span>
5 0
3 years ago
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inn [45]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
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