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Kazeer [188]
3 years ago
6

Solve this system of equations using elimination with multiplication

Mathematics
1 answer:
romanna [79]3 years ago
5 0

Answer:

Step-by-step explanation:

3x - 4y = -11

x - 2y = -5

Compare the coefficients of the variables.

The coefficients of the x terms, 3 and 1, are multiples of each other.

The coefficients of the y terms, -4 and -2, are also multiples of each other.

That makes it easy to eliminate either variable.

I'll eliminate the y variables. Multiply the second equation by -2, then add it to the first equation:

₋-2x + 4y = 10

 3x - 4y = -11

--------------------

 x + 0y = -1 ,  so x = -1.

Substitute -1 for x in either equation and solve for y:

3(-1) - 4y = -11

y = 2

(x,y) = (-1, 2)

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Vilka [71]

Based on the expression and the values of a, b, and c, the value of the expression is 6 ¹/₆.

<h3>What is the expression's value?</h3><h3 />

The expression is:

= (a + 2bc) / 3a

Solving gives:

= (4 + (2 x -5 x -7)) / (3 x 4)

= (4 + 70) / 12

= 74 / 12

= 6 ² /₁₂

= 6 ¹/₆

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2 years ago
The area of a rectangle is 4x+32. The length is 4. Find the width.
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4 years ago
(50 POINTS!) The figure is transformed as shown in the diagram. Describe the transformation.
Sladkaya [172]

Answer:

The solution is rotation, then translation. The figure has been rotated about the origin by 90° and then translated 6 units to the right.

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3 years ago
Trish and Aria are walking to raise money for the school library. Trish has walked 38 miles and walks 10 miles each week. Aria h
schepotkina [342]

Answer:

C. 4 weeks

Step-by-step explanation:

Trish and Aria are walking to raise money for the school library. Trish has walked 38 miles and walks 10 miles each week. Aria has walked 30 miles and walks 12 miles each week

After how many weeks will Trish and Aria have walked the same number of miles? A. 2 weeks B. 3 weeks C. 4 weeks D. 5 weeks

Trish = 38 + 10x

Aria = 30 + 12x

Where,

x = number of weeks

After how many weeks will Trish and Aria have walked the same number of miles?

Equate both equations

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3 years ago
How do you solve 29.9 -18.82
mezya [45]
ANSWER: 11.08

EXPLANATION: Add a zero after the 9 to make the number 29.90. Then subtract normally.
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4 years ago
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