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4 years ago

When solving the system of equations, x + 2y = 15 which expression could be substituted 5x + y = 21for x in the second equation?

Mathematics

1 answer:

IRISSAK [1]4 years ago

3 0

X=3 Y=6

5 x 3 = 15
15 + 6 = 21

3 + (2 x 6) = 15

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4) Which step could be completed in order to prepare the system of equations below for the elimination method?

borishaifa [10]

Answer:

Option C - Multiply the 1st equation by 2

Step-by-step explanation:

To find : Which step could be completed in order to prepare the system of equations below for the elimination method?

Solution :

1st equation: $5x-3y=10$

2nd equation: $8x+6y=15$

For elimination method,

We eliminate the y by multiplying 1st equation by 2 and add by 2nd equation.

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4 years ago

What is the distance between points A and B on the coordinate plane?

RoseWind [281]

Answer:

Step-by-step explanation:

use pythagorean theorem a^2 + b^2 = c^2

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2 years ago

Read 2 more answers

Find the first five terms in the sequences using the general term:<br><br><img src="https://tex.z-dn.net/?f=a_n%20%3D%202n%20-%2

Nata [24]

Answer:

- 3, - 1, 1, 3, 5

Step-by-step explanation:

To find the first 5 terms, substitute n = 1, 2, 3, 4, 5 into the general term

a₁ = 2(1) - 5 = 2 - 5 = - 3

a₂ = 2(2) - 5 = 4 - 5 = - 1

a₃ = 2(3) - 5 = 6 - 5 = 1

a₄ = 2(4) - 5 = 8 - 5 = 3

a₅ = 2(5) - 5 = 10 - 5 = 5

The first 5 terms are - 3, - 1, 1, 3, 5

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3 years ago