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kobusy [5.1K]
3 years ago
7

Trina earns $28.50 tutoring for 3 hours. Write an equation relating her earrings "m" to the number of hours "h" she tutors. Assu

ming the situation is proportional, how much would Trina earn tutoring for 2 hours? For 4.5 hours?
Mathematics
2 answers:
natulia [17]3 years ago
5 0

Answer:

Step-by-step explanation:

28.50/3=9.50 dollars per hour

y=9.50h

Trina earns $19.00 for 2 hours

Trina earns $42.75 for 4.5 hours

inysia [295]3 years ago
5 0

Answer:

If Trina earns $28.50 in 3 hours, that means she earns <u>$9.50 per hour.</u>

9.50<em>h</em> = <em>m </em><em>   --->  earnings = 9.50 x hours</em>

<em>2 hours = 9.50 ( 2) =  $19</em>

<em>4.5 hours = 9.50 ( 4) = $42.75</em>

Step-by-step explanation:

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Whats the percent change of 13.7 to 40.2
k0ka [10]

The percent change of 13.7 to 40.2 is 193.4%

To find percentage change, you need to find the difference between the two numbers. In this case, 26.5.

You then divide 26.5 by 13.7 and move the decimal point two spaces to the right.

6 0
4 years ago
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Find the equation of the line passing through the point (4,−1) that is parallel to the line 2x−3y=9.
motikmotik

Hey there!

Line passes through (4, -1) & is parallel to 2x -3y=9

Let's start off by identifying what our slope is. In the slope-intercept form y=mx+b, we know that "m" is our slope.

The given equation needs to be converted into slope-intercept form and we can do this by getting y onto its own side of the equal sign.

Start off by subtracting 2x from both sides.

-3y = -2x + 9

Then, divide both sides by -3.

y = (-2x + 9)/-3

Simplify.

y = 2/3x - 3

"M" is simply a place mat so if we look at our given line, the "m" value is 2/3. Therefore, our slope is 2/3.

We should also note that we're looking for a line that's parallel to the given one. This means that our new line has the same slope as our given line. Therefore, our new line has a slope of 2/3.

Now, we use point-slope form ( y-y₁=m(x-x₁) ) to complete our task of finding a line that passes through (4, -1). Our new slope is 2/3 & it passes through (4, -1).

y-y₁=m(x-x₁)

Let's start by plugging in 2/3 for m (our new slope), 4 for x1 and -1 for y1.

y - (-1) = 2/3(x - 4)

Simplify.

y + 1 = 2/3 + 8/3

Simplify by subtracting 1 from both sides.

y = 2/3x + 8/3 - 1

Simplify.

y = 2/3x + 5/3

~Hope I helped!~

7 0
4 years ago
The sum of the interior angles, s, in an n-sided polygon can be determined using the formula s = 180(n – 2), where n is the numb
disa [49]

Answer:

Equivalent equation of  s =180(n-2)  is   n =\frac{s}{180}+2

And the number of sides does a polygon have is, n =9.

Step-by-step explanation:

Given:

The sum of the interior angles, 's' in a n-sided polygon can be determined

using the formula is:  s =180(n-2)             .....[1]

where n is the number of sides.

We can write the equivalent equation of [1]

s = 180(n-2)

Divide both sides by 180;

\frac{s}{180} =\frac{180(n-2)}{180}

Simplify:

\frac{s}{180}=n-2

Add 2 to both sides of an equation:

\frac{s}{180}+2=n-2+2

Simplify, we get;

n =\frac{s}{180}+2                               ......[2]

Now, to find the value of n ;

Given: s =1260°

Substitute this value in [2] we get;

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3 years ago
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Choose which lines are perpendicular. after doing the necessary work, circle your final answer.
Burka [1]
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5 0
3 years ago
How many solutions does 5z - 8 – 7 = -4741 have?
N76 [4]

Answer:

unknown

Step-by-step explanation:

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