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serious [3.7K]
3 years ago
11

I need help with part b and c

Mathematics
1 answer:
Vikki [24]3 years ago
5 0

I am not sure about b cut I think C is 10

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What is the equation of a line parallel to the x-axis that passes though the point (4,5)? What is the slope of this line
Svetlanka [38]

Slope of a line parallel to the x -axis is 0

y = 5 is the required equation of a line parallel to the x-axis that passes though the point (4,5)

<h3><u>Solution:</u></h3>

Given that  a line parallel to the x-axis that passes though the point (4,5)

To find: slope of this line and equation of a line

The x -axis is a horizontal line with the equation y = 0 There are an infinite number of lines that are parallel to the x -axis, y = 0

All horizontal lines have slope of 0

If lines are parallel then they have the same slope. The slope of a line parallel to the x -axis is 0

The equation of a straight line parallel to x-axis at a distance b from it is y = b

Here "b" is the y - co-ordinate value

Here given point is (4, 5) so b = 5

The required equation is y = 5

<h3><u>Method 2:</u></h3>

We know slope "m" = 0

Given point is (4, 5)

<em><u>The slope intercept form is given as:</u></em>

y = mx + b --- eqn 1

Where "m" is the slope of line and "b" is the y - intercept

Substituting m = 0 and (x, y) = (4, 5)

5 = 0(4) + b

b = 5

Substitute b = 5  and m = 0 in eqn 1

y = 0 + 5

y = 5 is the required equation of a line parallel to the x-axis that passes though the point (4,5)

6 0
3 years ago
Goddesboi<br><br><br><br> this one!<br><br><br><br> what’s the answer?<br><br><br> thanks ^^
xz_007 [3.2K]

Answer:

C) 20.97 AED

Step-by-step explanation:

To find the expected value, E(X), or mean μ of a discrete random variable X, simply multiply each value of the random variable by its probability and add the products. The formula is given as \displaystyle E(X)=\mu=\sum xP(x).

Here, x represents values of the random variable X, P(x) represents the corresponding probability, and symbol \displaystyle \sum represents the sum of all products xP(x). Here we use the symbol \mu for the mean because it is a parameter. It represents the mean of a population.

In this case, the expected value of the ticket is \displaystyle E(X)=\mu=\sum xP(x)=12(0.08)+18(0.15)+20(0.31)+22(0.08)+24(0.15)+25(0.23)=20.97

This means that Ahmad can expect to win 20.97 AED for the ticket.

7 0
2 years ago
Solve 4r2 – 16 = 84.<br><br><br><br><br> {±4}<br><br><br> {±3}<br><br><br> {±6}<br><br><br> {±5}
Marta_Voda [28]
4r²<span>– 16 = 84
4r</span>² = 84+16
4r²= 100
r²=25
r=√25
r=<span>±5</span>
4 0
3 years ago
Ms. Maher made a recipe that calls for 144 fluid ounces. How many cups would that be?!?! A.
Lina20 [59]
Well,
1 cup= 8 oz.
If there is 144 ounces...'
Divide 8 into 144
144 divided by 8=
18
They can make 18 cups...
Hope this helps :)
8 0
2 years ago
Read 2 more answers
A rectangle made of square tiles measured 7 tiles long and 3 tiles wide. What is the length of a similar rectangle whose width i
lukranit [14]
7/3=L/9
⇒63=3L
⇒L=21
which mean the Length equal 21 tiles and width equal 9 tiles for the new rectangle.
8 0
3 years ago
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