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katrin2010 [14]
3 years ago
15

For the following system, use the second equation to make a substitution for y in the first equation.

Mathematics
1 answer:
ICE Princess25 [194]3 years ago
5 0

Answer:

It is A

Step-by-step explanation:

2x + y = 5

y + 3 = 2x

From equation 2:

y = 2x - 3

Substituting in the first equation:

2x + 2x - 3 = 5.

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GEOMETRY PLEASE HELP
marysya [2.9K]

Answer:

see explanation

Step-by-step explanation:

(5)

Since ∠EBA = 90° then ∠ABD = 90° ( straight angle ) and

∠ABC + ∠CBD = ∠ABD, that is

2x + 3x - 10 = 90, simplifying

5x - 10 = 90 ( add 10 to both sides )

5x = 100 ( divide both sides by 5 )

x = 20, thus

∠ABC = 2x = 2 × 20 = 40°

∠CBD = 3x - 10 = (3 × 20) - 10 = 60 - 10 = 50°

(6)

4x - 18 = 3x + 7 ( vertical angles are congruent )

Subtract 3x from both sides

x - 18 = 7 ( add 18 to both sides )

x = 25

7y = 5y + 28 ( vertical angles are congruent )

Subtract 5y from both sides

2y = 28 ( divide both sides by 2 )

y = 14

7 0
2 years ago
A cyclist rides her bike at a speed of 10 kilometers per hour. What is this speed in miles per hour? How many miles will the cyc
SashulF [63]
6.25 miles per hour
12.5 miles in 2 hours
6 0
2 years ago
Please help!!! 98 Brainliest Points to anyone who can help with these!!
Talja [164]
The distance between them is 4.0
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Hope that helps?
4 0
3 years ago
Time sensitive mark best as brainiest
ycow [4]

Answer:

4986 ounces/m³

Step-by-step explanation:

1 kilogram = 35.274 ounces

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We are converting kg/ft³ to ounces/m³

Hence:

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= 4985.7243816 ounces/m³

Approximately to the nearest whole number = 4986 ounces/m³

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Subtract 2/3 from both sides.

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3 years ago
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