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olga nikolaevna [1]
3 years ago
13

Using the elimination method to solve this system of equations problem 3x + 4y = 12 and -3x - 2y = 6, name its solution. *

Mathematics
1 answer:
xeze [42]3 years ago
8 0

Answer: x=-8 and y=9

Step-by-step explanation:

3x +4y=12 ( This can be equation 1)

-3x-2y=6 ( This can be equation 2)

Equation 1 + equation 2 = 2y=18

                                            y= 18÷2

                                            y=9

Substitute 9 for y in 3x+4=12

3x+4y=12

3x+4(9)=12

3x+36=12

3x= 12-36

3x=-24

x= -24÷3

x= -8

Therefore x=-8 and y=9

Mark me as the brainiest answer

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24.4 Units

Step-by-step explanation:

For this, we will use the distance formula to find the distance between each vertex

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So we do this for each side of the triangle to get AB = \sqrt{52}, BC = \sqrt{109}, and AC = \sqrt{45}

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Step-by-step explanation:

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Order these from greatest to least <br> 7 7/8, 7.5, 7.8, 7 3/4
Marizza181 [45]

<em><u>The numbers are ordered from greatest to least is:</u></em>

7\frac{7}{8} >7.8 > 7\frac{3}{4} > 7.5

<em><u>Solution:</u></em>

<em><u>Given numbers are:</u></em>

7\frac{7}{8} , 7.5, 7.8, 7\frac{3}{4}

We have to order them from greatest to least

Let us first convert the mixed fractions number to decimals

Mixed fractions to fractions:

Multiply the whole number part by the fraction's denominator.

Add that to the numerator.

Then write the result on top of the denominator.

Therefore,

7\frac{7}{8} = \frac{8 \times 7 + 7}{8} = \frac{63}{8} = 7.875

Similarly,

7\frac{3}{4} = \frac{4 \times 7 + 3}{4} = \frac{31}{4} = 7.75

<em><u>Now the given numbers are:</u></em>

7.875, 7.5, 7.8, 7.75

<em><u>Arrange them from greatest to smallest</u></em>

7.875 > 7.8 > 7.75 > 7.5

<em><u>Thus the order is:</u></em>

7\frac{7}{8} > 7.8 > 7\frac{3}{4} > 7.5

Thus the numbers are ordered from greatest to least

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