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Tpy6a [65]
3 years ago
7

Evaluate: Σ10, 8(27-1) =

Mathematics
1 answer:
vfiekz [6]3 years ago
7 0

Answer:

Step-by-step explanation:

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Pleeeeese help me as fast as you can!!!
Aleonysh [2.5K]

Answer:

A. y=3x-10

C. y+6=3(x-15)

Step-by-step explanation:

Given:

The given line is 6x+18y=5

Express this in slope-intercept form y=mx+b, where m is the slope and b is the y-intercept.

6x+18y=5\\18y=-6x+5\\y=-\frac{6}{18}x+\frac{5}{18}\\y=-\frac{1}{3}x+\frac{5}{18}

Therefore, the slope of the line is m=-\frac{1}{3}.

Now, for perpendicular lines, the product of their slopes is equal to -1.

Let us find the slopes of each lines.

Option A:

y=3x-10

On comparing with the slope-intercept form, we get slope as  m_{A}=3.

Now, m\times m_{A}=-\frac{1}{3}\times 3=-1. So, option A is perpendicular to the given line.

Option B:

For lines of the form x=a, where, a is a constant, the slope is undefined. So, option B is incorrect.

Option C:

On comparing with the slope-point form, we get slope as  m_{C}=3.

Now, m\times m_{C}=-\frac{1}{3}\times 3=-1. So, option C is perpendicular to the given line.

Option D:

3x+9y=8\\9y=-3x+8\\y=-\frac{3}{9}x+\frac{8}{9}\\y=-\frac{1}{3}x+\frac{8}{9}

On comparing with the slope-intercept form, we get slope as  m_{D}=-\frac{1}{3}.

Now, m\times m_{D}=-\frac{1}{3}\times -\frac{1}{3}=\frac{1}{9}. So, option D is not perpendicular to the given line.

8 0
3 years ago
Les baked 48 cookies for the bake sale at school, and sold 36 of them. in fraction form, how many cookies did Les have left?
inna [77]

Answer:

Les sold 36 of 48.

          36/48

Step-by-step explanation:

36 over 48  reduces to 3/4.

 

she sold 3/4 of the cookies.

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3 years ago
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Which statement describes the first step to solve the equation by completing the square?
Readme [11.4K]

Answer:

It's Multiply both sides of the equation by 1/2, I literally just took the quiz.  

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3 years ago
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The box plots show Theo’s math scores and language arts scores. About 50% of Theo’s scores are in which range for each subject?
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Answer: 55 to 90 for math; 50 to 90 for language arts

Step-by-step explanation:

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25.6 × ? = 35.84. Please Help ASAP!!!​
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You have to divide both sides by the coefficient, which is 25.6.

Answer: 1.4

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