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Vinil7 [7]
3 years ago
9

During the summer, Heather has a two part-time jobs. She earns $7 an hour as a life guard and $10 an hour as a tutor. This week,

Heather works for a total of 35 hours. If Heather earns $290 in a week, how many hours does she work at each job?
Mathematics
2 answers:
Kazeer [188]3 years ago
7 0

Answer:

Step-by-step explanation:

Lifeguard=x

tutor=35-x

7x+10(35-x)=290

7x+350-10x=290

-3x=-60

x=20 hours as a lifeguard ($140)

35-x=15 hours as a tutor ($150)

adds to $290.

Hope that helps! :)

natali 33 [55]3 years ago
6 0

Answer:

she works 15 hours as a tutor and 20 hours as a life guard.

Step-by-step explanation:

life guard: $7 x 20=140$

                                                                                 

tutor:   $10 x 15= 150$

140+150=290 dollars

20 + 15=35 hours

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If the coefficient of determination for a data set containing 24 points is 0.5,
aleksandrvk [35]

Answer:

False

Step-by-step explanation:

False - one has nothing to do with the other. None of the data points can lie on the regression line,

and you can have the coeff. of determination be 0.5.

7 0
3 years ago
(pls also provide an explanation for how i do this)
Marizza181 [45]

Answer:

slope = \frac{3}{4}

Step-by-step explanation:

Calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (5, 3 ) and (x₂, y₂ ) = (9, 6 )

m = \frac{6-3}{9-5} = \frac{3}{4}

6 0
2 years ago
What is the volume of this container?
BabaBlast [244]

Answer:

1253 inches cubed

Step-by-step explanation:

V=L*W*H,so 11*14*7=1078   and 7*5*5=175

175+1078=1253

Mark me brainliest if I helped:D

7 0
3 years ago
Read 2 more answers
15% of the seats on an airplane are first class if there are 24 class seats how many seats are on the plane ​
Andrej [43]

Answer:

160

Step-by-step explanation:

there are 24 first class seats. 15% of the total number is 24. that would mean 5% of the total number is 8. 20 times 8 is 160.

6 0
2 years ago
4. Which of the following lines is perpendicular to y = -2X + 8?
Alenkinab [10]

For this case we have to by definition, if two lines are perpendicular then the product of its slopes is -1.

That is to say:

m_ {1} * m_ {2} = - 1

We have the following equation:

y = -2x + 8

So:

m_ {1} = - 2

Thus:

m_ {2} = \frac {-1} {m_ {1}}\\m_ {2} = \frac {-1} {- 2}\\m = \frac {1}{2}

Thus, a line perpendicular to the given line must have slope m = \frac {1} {2}.

Option A:

x + 2y = 8\\2y = -x + 8\\y = - \frac {1} {2} x + 4

It is not perpendicular!

Option B:

x-2y = 6\\2y = x-6\\y = \frac {1} {2} x-3

If it is perpendicular!

Option C:

2x + y = 4\\y = -2x + 4

It is not perpendicular!

Option D:

2x-y = 1\\y = 2x-1

It is not perpendicular!

The correct option is option B

ANswer:

Option B

5 0
3 years ago
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