Mathematics High School

A plumber charges a base fee of $ 60, and then each hour of work costs $ 15. Yesterday Joe hired the plumber to fix his sink, at a total cost of $ 240. How many hours did the plumber work 3.75 hours 4 hours 12 hours 16 hours

Answers

Answer 1

Answer:

12 hours

Step-by-step explanation:

Step one:

given data

base fee= $60

charge per hour= $15

let the number of hours the plumber work be x

the linear function for the charge is the equation of line.

that is y=mx+c

Step two:

given that y=$240

240=15x+60

240-60=15x

180=15x

divide both sides by 15 we have

x=180/15

x=12

The number of hours is 12

Related Questions

spimplyfy 2x+4-3x+2+3x2 x + 4 − 3 x + 2 + 3 x

Answers

Answer:

12x + 12

Step-by-step explanation:

2x+4-3x+2+3x(2)+x+ 4 − 3 x + 2 + 3 x

Solve 3x(2) = 6x

Next combine like terms

Like terms:

2x + 3x + 6x + 1x + (-3x) + 3x = 12x

4 + 2 + 4 + 2 = 12

Rewrite simplified

12x + 12

^^This is the correct answer assuming that 3x2 x is 3x(2) + x

You were billed $28.50 for additional data usage on your cell phone at a rate of $9 per gigabyte. Three choices are correct ways to calculate the additional gigabytes, g, that you used. Which choice is NOT?

Answers

Answer:

b.) 9/g = 28.5

Step-by-step explanation:

a.) 9g = 28.5

b.) 9/g = 28.5

c.) 28.5 = 9 x g

d.) 28.5/9 = g

Total billing = $28.50

Rate = $9 per gigabyte

Calculate the additional gigabytes, g, that you used.

Additional gigabyte used, g = Total billing / Rate

g = $28.50 / $9

9g = 28.50

28.50 = 9 × g

g = 28.50 / 9

Option b.) 9/g = 28.5 is the incorrect way to calculate the additional gigabytes, g, that you used.

Answer:

9/g = 28.5

Step-by-step explanation:

It's attached to the image to show proof it's right

What is the slope and y-intercept of x/3= -y+2 and how?????

Answers

subtract 2 from both sides

then you get -y equals 1/3x -2 so you have to flip the sign of the entire equation because you can’t have a negative line

so you get y = -1/3x + 2

the y-intercept is (0,2)

the slope is -1/3x (aka -x/3)

What is the dollar value of 2 pennies and 3 dimes? What is the dollar value of p
Dennies and d dimes?

Answers

Answer:

32 cents? This is a weird phrased question!

Step-by-step explanation:

i need elp ill give a brainly to whoever helps me

Answers

Answer:

x=3

Step-by-step explanation:

cross multiply

12.5*2=30

10*x=10x

10x=30

/10

x=3

Answer:

Step-by-step explanation:

2.5X12=30

Solve 2c − 8f = 24 for f. Show your work.

Answers

Answer:

f=2 c=4

Step-by-step explanation:

8 times 2 equals 16 plus 2 times 4 equals 24 in total.

The probability of an outcome that lies within 68% of the mean is a good indicator that it lies in which standard deviation?
A. There is a probability that the outcome is within 1 standard deviation of the mean.
B. There is a probability that the outcome is within 3 standard deviations of the mean.
C. There is a probability that the outcome is within 2 standard deviations of the mean.
D. Standard deviations are not reliable, so the probability cannot be determined.

Answers

Answer:

The correct answer is B or option 2.

Please help :) Please help :)

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Use the figure to find the measure of angle 1. *

Answers

Answer: angle 1 = 110 degrees

This is because angle 1 and the red 110 degree angle are corresponding angles.

They correspond to one another due to the fact they are both in the southwest corner of each 4-corner angle configuration (which is the result of crossing two lines)

Corresponding angles are congruent only when we have parallel lines like this.

State if the two triangles are congruent, if they are state how you know.

A. SSS
B. HL
C. LL

Answers

Answer:

I belive it would be HL because its defenitly not SSS

Step-by-step explanation:

HL Postulate is if the hypotenuse and leg of one right triangle are congruent to the hypotenuse and leg of another right triangle, then the two triangles are congruent.

The smallest cube has a length of 6 inches.What are the edge lengths of the other cubes if the ratios of similarity to the smallest cube are 1.25, 4/3, 1.5, 7/4 and 2 respectively

Answers

Ans is in the attachment

hope it helps :)

plz mark as brainliest

Johnny is given 18 bottles of beer and he drinks 6 of them. How much beer does Johnny have left?

Answers

Answer: 12 bottles left

Step-by-step explanation:

18-6=12 bottles

Answer:

Johnny will have 7 beer bottles left.

Step-by-step explanation:

A penguin walks 10 feet in 6 seconds. At this speed how far does the penguin walk in 45 seconds?

Answers

10/6 feet per second
10/6 * 45 = 75 feet

Pls help i reall need help with this
Simplify Each
1. 3 - {7 - [8 + (7 - 3)] }
2. 12 - ( 3 - 4) - [8 - 6] + 5
3. - {2 - [7 - 8] + 2 - (1 - 3)}
4. 6 + 3
2 + 3
5. 4+5
- [ 8 - (245)]
1 - 4

Answers

Answer:

1.8

2.16

3.-7

5.-702

I didn't understand the 4th one

Answer:

1) 8

2) 16

3) -7

4) 14

5) 243

Step-by-step explanation:

For number 4 i just assumed you meant 6 + 3 + 2 + 3

Help!!!

By rounding each number to 1sf. Estimate the answer to 7.238 × 125.5413

Answers

Answer:

909

Step-by-step explanation:

I'm not sure if I'm right plz tell me if I'm wrong

Patrick spent a total of $29.82 for 14 paintbrushes, $31.84 for 16 drywall anchor screws, $27.15 for 12 light bulbs, and $36.54 for 18 pieces of sandpaper at his local hardware store. Which purchase had the highest per item cost?
A.
paintbrushes
B.
light bulbs
C.
sandpaper
D.
drywall anchor screws

Answers

Answer: Light bulbs.

Step-by-step explanation:

Paint Brushes: 29.82 ÷ 14 = $2.13 per brush.

Drywall Screws : 31.84 ÷ 16 = $1.99 per anchor screw.

Light Bulbs: 27.15 ÷ 12 = $2.26 per light bulb.

Sandpaper: 36.54 ÷ 18 = $2.06 per piece of sandpaper.

What are three inequalities equal to 15x+20y=150?

Answers

Answer:

1. 3x+4y=30

2. 30x+40y=300

3. x+4/3y=10

Step-by-step explanation:

How many boxes should be shaded on the grid to show 3/8 x 3/4

Answers

Answer:

9 boxes

Step-by-step explanation:

Which is a correct interpretation of the slope of the line in this graph? (2,8) (7,6)
The volume of water in the tank is decreasing by 2 L per hour.
The volume of water in the tank is decreasing by 0.2 L per hour.
The volume of water in the tank is decreasing by 2.5 L per hour.
The volume of water in the tank is decreasing by 0,4 L per hour

Answers

Answer:

The volume of the water in the tank is decreasing by .4 an hour

Step-by-step explanation:

3(10 - x) = 21
30 -
21
30 - 3x
= 21
- 3x
- 3x
-9
=
X =

Answers

Answer:

x=3

hope this answers is ok na

Step-by-step explanation:

I am answering blanks left to right and top to bottom.

30 30

-9

-3 -3

x = 3

x·6−14=46

Answer asap!!!! thank you!!

Answers

Answer:

x=10

Step-by-step explanation:

[tex]6x-14=46\\6x=60\\x=10[/tex]

Solve for x
-22=2(x-10)

Answers

Answer:

−

(

−

)

x-22={\color{#c92786}{2(x-10)}}

x−22=2(x−10)

−

Step-by-step explanation:

Answer:

x=-21

Step-by-step explanation:

first expand the brackets

-22=2x-20

then make x on its own

-42=2x

then dived by 2

-21=x

Describe the angle as it relates to the digram
;) :)

Answers

The answer elevation /_angle B /_ V

Answer:

Step-by-step explanation:

∠4 is angle of elevation from ∠C to ∠D

Six students are working to simplify the expression shown. Drag each student’s answer to a box to show whether it is fully simplified equivalent to the given expression but not fully simplified, or not equivalent to the given expression.

Answers

Answer: The arrows show the appropriate destination for your dragging.

_____

Combining like terms in the given expression makes it simplify to ...

(2x -18x) +(14y) +(9 -10) = -16x +14y -1

We are to compare this expression with the offered expressions to see if they simplify to the same thing. We'll examine those left-to-right starting with the top row:

2x -18x +14y -19 = -16x +14y -19 . . . not the same

-2xy -1 . . . not the same

16x +14y -1 . . . not the same

9 -16x +14y -10 = -16x +14y -1 . . . equivalent

-16x +14y -1 . . . equivalent and simplified

2x -18x +14y -1 = -16x +14y -1 . . . equivalent

Step-by-step explanation:

Please finish 13,14,15 please I will give 10 points and brainliest

Answers

Answer:
13. 2.5
14. -2
15. 1.5

Equations:
13. y=2.5x-3
14. y=-2x+1
15. y=1.5x-8

what is the x variable and y variable?

Answers

Answer:

x is the hours worked and y is the money earned

Step-by-step explanation:

Usually the x variable is the independent variable

The independent variable is the variable that does not rely on anything

The y variable is the dependent variable

The dependent variable is the variable that relies on the independent variable

In this case the money earned depends on how many hours you work for

I hope this helps :)

Answer:

I believe that it would be x is hours worked and y is dollars earned but I could be wrong I skipped a year of math because I completed it so quickly now I cant remember some stuff

4/5x - 1/10 = 3/10 what is the value of x

Answers

Answer:

x=1/2 or 0.5

Step-by-step explanation:

Hope this helps and have a great day :)

Can someone help me cuz i need help

Answers

Answer:

klllllllllk

Step-by-step explanation:

C and E are true
———————————

Graph the equation y= -1/2x

Answers

Answer: I can’t show you a graph, however I can explain how to graph it.

First make a graph that has a y and x axis with 4 numbers going up, down, left, right. At intervals of 1. Plot a dot at 0 or the center, and then move one up and two to the left, then plot a dot there. Repeat that one more time if you made a graph like I explained. Then, on the other side of the graph do the same thing except instead of 1 up, two to the left, it’s one down two to the right. Repeat that one more time and that should be your graph.

The graph of equation y = - 1/2x is shown in attached image.

We have to given that,

Equation is,

⇒ y = - 1/2x

Since, The equation of line in slope intercept form is,

y = mx + c

Where, m is slope and c in y - intercept.

Here, equation is,

y = - 1/2x

Hence, It is passes through origin.

Therefore, The graph of equation y = - 1/2x is shown in attached image.

Learn more about the equation of line visit:

https://brainly.com/question/18831322

#SPJ6

(70 points) please answer this question and explain how you get the answer!!

Answers

Answer: -0.10

Step-by-step explanation:

there is a pattern because 2014 0.45, 2015 0.20, 2016 0.35, 2016 0.10.

Answer: -0.10

Step-by-step explanation:

because of the down fall

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