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Y_Kistochka [10]
3 years ago
12

Which equation represents a proportional relationship?

Mathematics
1 answer:
makvit [3.9K]3 years ago
6 0

Answer:

the answer is a.

Step-by-step explanation:

every other answer has a y-intercept.

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Matt bought some boards to build a wooden deck. Some of the boards were 4 ft long and some of the boards were 5 ft long. He boug
Kazeer [188]

Answer:

8 boards.

Step-by-step explanation:

Since he bought a few of each length. The only combination that works is when he bought 5 of the 4 ft long board so 4×5=20. Than he bought 3 of the 5ft boards 3×5=15. 20+15=35 ft worth of boards.

4 0
3 years ago
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Ty in advance god bless
damaskus [11]

Step-by-step explanation:

3/7y + 3/4x = 3/5

y = -3/4x.7/3 +3/5.7/3

y = -7/4x +7/5

so the slope is -7/4

6 0
2 years ago
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The figure above shows the probability density function for the random variable x. What is P(3≤x<7)?
qwelly [4]

The value of the probability P(3≤x<7) is 1

<h3>How to evaluate the probability expression?</h3>

The expression is given as: P(3≤x<7)

This is calculated using:

P(3 ≤ x < 7) = P(3) + P(4) + P(5) + P(6)

Using the figure of the probability density function (see attachment), we have:

P(3 ≤ x < 7) = 0.30 + 0.30 + 0.20 + 0.20

Evaluate

P(3 ≤ x < 7) = 1

Hence, the value of the expression is 1

Read more about probability density function at:

brainly.com/question/15318348

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4 0
1 year ago
PLEASE HELP ITS FOR A TEST!!
Mashutka [201]

Answer:

22.5

Step-by-step explanation:

multiply 5 x 7 and add half of 5.

multiply 3 x 7 and add half of 3.

width is 22.5

6 0
2 years ago
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Factor completely: <br><br> A) 64x²-49y²<br> B) 20x²-45y²
tigry1 [53]

Use\\a^2-b^2=(a-b)(a+b)\\(ab)^n=a^nb^n\\(\sqrt{a})^2=a\ for\ a\geq0\\------------------------------\\A)\ 64x^2-49y^2=8^2x^2-7^2y^2=(8x)^2-(7y)^2=(8x-7y)(8x+7y)\\\\B)\ 20x^2-45y^2=(\sqrt{20})^2x^2-(\sqrt{45})^2y^2=(*)\\\\\sqrt{20}=\sqrt{4\cdot5}=\sqrt4\cdot\sqrt5=2\sqrt5\\\sqrt{45}=\sqrt{9\cdot5}=\sqrt9\cdot\sqrt5=3\sqrt5\\\\(*)=(2\sqrt5x)^2-(3\sqrt5y)^2=(2\sqrt5x-3\sqrt5y)(3\sqrt5x+3\sqrt5y)

or:\\\\20x^2-45y^2=5\cdot4x^2-5\cdot9y^2=5(4x^2-9y^2)=5[(2x)^2-(3y)^2]\\\\=5(2x-3y)(2x+3y)

3 0
3 years ago
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