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2 years ago

Solve each using substitution Y=3x-5 2x+3y=29 3x+y=30 Y=5x+6

Mathematics

1 answer:

Butoxors [25]2 years ago

4 0

Question 1: X=4
Question 2: X=4

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What is 17% of 13.00

Margarita [4]

Answer:

The answer is 2.21

Step-by-step explanation:

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3 years ago

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Write an equation for this relationship.

disa [49]

Answer:

y=18.5x

Step-by-step explanation:

74-55.5=18.50

92.50-74=18.50

111-92.5=18.50

(3,55.50)

y=18.5x +b

55.50=18.5(3)+b

55.50=55.50+b

b=0

8 0

3 years ago

Which ordered pair is the solution to the system of linear equations y = -7x + 2 and y = 9x - 14?

lisabon 2012 [21]

Y = -7x + 2
y = 9x - 14

-7x + 2 = 9x - 14
14 + 2 = 9x + 7x
16 = 16x
1 = x

y = -7x + 2
y = -7(1) + 2
y = -7 + 2
y = -5

solution is : (1,-5) <==

4 0

2 years ago

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the area of one face of a cube is 36 sq feet. what is the volume of a cube that had edges that are twice as long?

noname [10]

The cube with 1 face with area 36 ft^2 has an edge of 6 ft.

The other cube has edges 2 * 6 = 12 ft long and its volume is 12^3

= 1728 ft^3 (answer).

6 0

3 years ago

Which expressions are equivalent to Negative 9 (two-thirds x + 1)? Check all that apply.

Sav [38]

Answer:

$-9(\frac{2}{3}x) + 9(1)\\ \\-6x + 9$

Explanation:

Before we begin, remember the following rules:

1- Distribution property:

$a(b+c) = ab+ac$

2- Simplification of fractions:

$\frac{xy}{yz}=\frac{x}{z}$

3- Signs in multiplication:

+ve * +ve = +ve

-ve * -ve = +ve

+ve * -ve = -ve

Now, for the given problem, we have:

$9 (\frac{2}{3}x + 1)$

Starting with the distributive property:

$-9 (\frac{2}{3}x +1) = -9(\frac{2}{3}x) - (-9)(1) = -9(\frac{2}{3}x) + 9(1)$

..................>This corresponds to option 1

Now, we simplify the output from the above step:

$-9(\frac{2}{3}x) + 9 = \frac{-9*2}{3}x + 9 = -6x+9$

................> This corresponds to option 5

Hope this helps :)

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3 years ago

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