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tresset_1 [31]
3 years ago
15

Can anyone help out?

Mathematics
1 answer:
vampirchik [111]3 years ago
5 0
Exponential decay is the answer
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Which of the following situations is best represented by the equation y = 15x ?
IrinaK [193]

Answer:

B.) There were 15 more questions on the test than the last test.

Step-by-step explanation:

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2 years ago
What is the solution to the equation 9k = 40.5?<br><br> k= 4<br> k= 4.5<br> k= 5
Scilla [17]

Answer:

k=4.5

Step-by-step explanation:

40.5/9

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3 years ago
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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.

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3 years ago
Simplify the product. Write the answer in standard form.<br>(x2 + 4)(x+3)​
Citrus2011 [14]

Answer:

x^3 + 3x^2 + 4x + 12

7 0
3 years ago
A line goes through the points (1, 4) and (2, 6). Write the equation of this line in slope-intercept form.
umka21 [38]
Y2-y1=6-4=2
x2-x1=2-1=1
2/1=2
The slope is 2
y=2x+b
4=2(1)+b
4=2+b
-2
2=b


y=2x+2
6 0
3 years ago
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