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2 years ago

Which of the following equations shows how substitution can be used to solve the following system of equations?

Mathematics

1 answer:

igor_vitrenko [27]2 years ago

4 0

Answer:

(3, 5)

Step-by-step explanation:

y = 2x - 1

3x + 2y = 19

In the second equation, substitute 2x - 1 in for y, since y equals 2x - 1 in the first equation. Solve for x.

3x + 2(2x - 1) = 19

3x + 4x - 2 = 19

7x - 2 = 19

7x - 2 + 2 = 19 + 2

7x = 21

7x/7 = 21/7

x = 3

Pick the first equation to solve for y since it says y =. Substitute 3 in for x.

y = 2x - 1

y = 2(3) - 1

y = 6 - 1

y = 5

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3 years ago

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Answer:

Step-by-step explanation:

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Function A:

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3 years ago

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Ad libitum [116K]

Answer:

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Step-by-step explanation:

Subtract 27,544 km from 80,452 km to answer this question:

80,452 km

- 27,544 km

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3 0

3 years ago

A package of balloons contains 5 green, 3 yellow, 4 red, and 8 pink balloons. Suppose you reach in the package and choose one ba

Marianna [84]

Probability of choosing pink balloon is $\frac{2}{5}$ .

Step-by-step explanation:

Given,

Number of green balloons = 5

Number of yellow balloons = 3

Number of red balloons = 4

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To find the probability of pink balloon.

Formula

Probability of an even = number of outcomes ÷ total number of outcomes

So,

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6 0

3 years ago

Read 2 more answers