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grandymaker [24]
3 years ago
10

Finish solving the system of equations –9.5x – 2.5y = –4.3 and 7x + 2.5y = 0.8 using the linear combination method. 1. Determine

which variable will be eliminated: y will be eliminated because –2.5y and 2.5y are opposite terms. 2. Add the equations together to create a one-variable linear equation: –2.5x = –3.5 3. Solve to determine the unknown variable in the equation: x = 1.4 4. Substitute the value of the variable into either original equation to solve for the other variable.
Mathematics
2 answers:
mars1129 [50]3 years ago
7 0

Answer:

Step-by-step explanation:

The given equations are:

-9.5x – 2.5y = –4.3                    (1)

and 7x + 2.5y = 0.8                  (2)

Adding equation (1) and (2) together, we get

-9.5x-2.5y+7x+2.5y=-4.3+0.8

⇒-2.5x=-3.5

⇒x=1.4

Now, substitute the value of x=1.4 in equation (1),

-9.5(1.4)-2.5y=-4.3

⇒-13.3-2.5y=-4.3

⇒-13.3+4.3=2.5y

⇒-9=2.5y

⇒y=-3.6

Thus, the value of x and y are 1.4 and -3.6 respectively.

zimovet [89]3 years ago
5 0

Answer:

(1.4, -3.6). Given that x = 1.4, sibstitute that into one of the equations to get the value for y.

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Calculate the slope of the line passing through the two colored points below. (1,4) (-1,-1)
leonid [27]

Answer:

Slope = \frac{5}{2}

Step-by-step explanation:

We can define the slope as the "change in y values" divided by the "change in x values".

By change in, we mean, 2nd point MINUS the first point values.

The points given is:

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<u>Change in x value:</u>

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stich3 [128]

For a regular 17-gon, the measure of the internal angles is:

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<h3>How to measure the internal angles?</h3>

The measure of the sum of the internal angles of a regular figure of N sides is:

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For the case where N = 17, we have:

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That is the measure of the sum of the internal angles, and we have 17 of them, so the measure of each angle is:

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Answer:

D, E, C, A, and B.

Step-by-step explanation:

We wish to solve the equation:

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2x-6+7-3x=11

2) Commutative Property of Addition (we rearrange them):

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D, E, C, A, and B.

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