You need to hire an electrician to install new wiring in your house. Electrician A charges $75 plus 45 per hour. Electrician B charges $100 plus $40 per hour. (A). Write a system of equations for this situation. (B). For how many hours of work are the total costs the same for both electricians?

Answers

Answer 1

The equations take a linear form and are as follows; Part A.

Electrician A; c = 75 + 45h....eqn(1)Electrician B; c = 100 + 40h....eqn(2)

Part B: It takes 5 Hours of work for the total costs to be the same.

The point at which the total costs are the same for both electricians is at;

75 + 45h = 100 + 40h

45h - 40h = 100 - 75

5h = 25

h = 5hours.

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Related Questions

Find the social security tax deducted for each weekly paycheck of $237.

Answers

Answer:

$14.70

Step-by-step explanation:

Graph the line with the equation y = -x - 3.

Answers

Answer:

Step-by-step explanation:

[tex]y=-x-3[/tex]

This means a graph with a slope of -1, and a y-intercept of -3

Savannah earns $247. 00 how many hours did she work.

Answers

Answer:

56

Step-by-step explanation:

1.  8.25

2.  Savannah

3.  

Earnings of Savannah:   $190

Earnings of Greg:   $180

Earnings of Kevin:   $165

4.  26 Hours

5.  55.55 hours (or 56 hours)

I need help with my math

Answers

Answer:

Find the point of intersection of the graphs of the equations.

Step-by-step explanation:

that's the answer

keep on leaning math

memona has a 6kg sack of rice and some empty bags. she fills each bag with 475 grams of rice from the sack. how many bags can memona completely fill with rice?

Answers

Answer:

1500

Step-by-step explanation:

1000×6÷4

250×6

1500

ADD the following

1. 12a²b² , -7a²b² and 9a²b²
2. 4x²y , -3xy² , -5xy² , 5x²y

Subtract the following

1. -10abc from 10abc
2. -5y from y²

spammers = reported
don't give unwanted ans to steal the points
well explained ans needed :) ​

Answers

1. 1. 12a²b² , -7a²b² and 9a²b²

anwer ;

12a²b² - 7a²b² + 9a²b² = ( 12 - 7 + 9 )a²b²= 14 a²b²

2. 4x²y , -3xy² , -5xy² , 5x²y

answer ;

( 4x²y + 5x²y ) + (- 3xy² - 5xy² ) = (4 + 5)x²y + ( -3 - 5) xy² = 9x²y - 8 xy²

3. -10abc from 10abc

answer ;

10abc - ( -10abc ) = 10abc + 10abc = (10 + 10) abc 20abc

4. -5y from y²

answer ;

y² - ( -5y² ) = y² + 5y²= y² ( 1 + 5 ) = 6y²

I hope my answer helps you

#1

[tex]\\ \sf\longmapsto 12a^2b^2-7a^2b^2+9a^2b^2[/tex]

[tex]\\ \sf\longmapsto (12-7+9)a^2b^2[/tex]

[tex]\\ \sf\longmapsto 14a^2b^2[/tex]

#2

[tex]\\ \sf\longmapsto 4x^2y-3xy^2-5xy^2+5x^2y[/tex]

[tex]\\ \sf\longmapsto 9x^2y-8xy^2[/tex]

#3

[tex]\\ \sf\longmapsto 10abc-(-10abc)=(10+10)abc[/tex]

[tex]\\ \sf\longmapsto 20abc[/tex]

#4

[tex]\\ \sf\longmapsto y^2-(-5y)[/tex]

[tex]\\ \sf\longmapsto y^2+5y[/tex]

i need the answer pls help

Answers

Answe

a=3

Step-by-step explanation:

The temperature of a substance in an experiment changes by -7.5°F from 8 a.m. to 2 p.m. At 5 p.m., the temperature is 43.5°F. It is 1/3 of what the temperature was at 2 p.m. What was the temperature at 8 a.m. of the substance?​

Answers

Answer:

ok

Step-by-step explanation:

Answer:

138* F

Step-by-step explanation:

If 43.5 is 1/3 of what it was at 2 p.m. then we need to multiply the equation by three where we get 130.5. Since it changed by -7.5 we have to add 7.5 to get our final answer of 138 degrees at 8 P.M.

What is the name of the property illustrated below?
3(x+4)=(x+4)+3
a :associative property of addition
b :commutative property of addition
c: associative property of multiplication
d: commutative property of multiplication

Answers

Step-by-step explanation:

I think you made a mistake with the equation.

because that property, that you presented, did not exist.

but

3(x+4) = (x+4)3 exists

and it is the commutative property of multiplication (a×b = b×a).

PLS HELP ME WITH THIS QUESTION.I AM LITERALLY DYING!!I WILL GIVE BRAINLIEST AND 45 POINTS!!The following equation is an example of a literal equation. 2 ( x + a ) = 4 b A. Solve the given equation for the variable a . In your final answer, include all of your work. B. In two or more complete sentences, explain the specific process that you followed in solving​

Answers

[tex]Let's solve for a.2(x+a)=4bStep 1: Add -2x to both sides.2a+2x+−2x=4b+−2x2a=4b−2xStep 2: Divide both sides by 2.\frac{2a}{2} =\frac{4b-2x}{2} \\a=2b-x\\Answer:a=2b−x[/tex]

Please solve using the image. No links.

Answers

Answer:

(A) True. False. True.

(B) 4

Step-by-step explanation:

Nobody is answering :( so please help (show work) NO LINKS

Answers

Answer:

dam I'll try to find the. answer 4 u

Question 1-2
1
Tom walks 1 mile in
of an hour. Kyle walks 4 miles in
4
of an hour.
5
Who walks at a faster speed, Kyle, Tom, or neither?

Answers

Answer:

460 feet

Step-by-step explanation:

Kyle walks the fastes

What is the least common
multiple of 23 and 92?

Answers

Answer:

92

Step-by-step explanation:

23: 23, 46, 69, 92

92: 92

Answer:

92

Step-by-step explanation:

92 is a multiple of 23

23(4)=92

92 is the smallest number that both 92 and 23 will go into.

find the equation of a line , in Slope intercept Form , that has a slope of 3 and passes through the point (-4,2).

Answers

Answer:

y = 3x + 14

Step-by-step explanation:

Slope: 3

y-intercept: 2 - (3)(-4) = 2 + 12 = 14

If shown, AB and CD are straight lines. Find x in each case

Answers

Answer:

60

Step-by-step explanation:

[tex]x \: + \: y \: + 30 \: + 30 \: = 180 \: \: \: \: \: \: \: \: \: (1)\\ \\ y + 30 = 90 \\ y = 90 - 30 \\ y = 60 \\ \\ (1) \: \: \: \: \: \: \: \: \: \: \: \: \: x + 60 + 30 + 30 = 180 \\ x = 180 - 120 \\ x = 60[/tex]

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Given: -3x + y = 1.



Write the equation in general form Ax + By + C =0.

3x - y = -1
3x - y + 1 = 0
-3x + y - 1 = 0

Answers

The answer is the last option.

All you have to do is subtract the 1 on both side of the equation to set it to 0 to get it into the general form.

which of the following is the value of the expression x^2+4/2 when x=-2

Answers

Answer:

6

Step-by-step explanation:

x^2 + 4 ÷ 2

-2^2 + 4 ÷ 2

4 + 4 ÷ 2

4 + 2

6

Help pls
Help pls
Help pls

Answers

Answer:

seems like its so hard bye

Tom has a circular clock with a circumference of 39.88 inches. What is the radius of Toms's clock,to the nearest hundredth of an inch?

Answers

Answer: 6.35

hope this helps.

Irma is just learning to play the Happy Fairies video game. In the game, players gain and lose points based on how well they take care of the fairies in their fairy gardens. Irma had a total of

5 points. Then, her fairy house fell over in the wind and she got

3 points.
How many total points does Irma have now?

Answers

Irma has a total point of -8 now.

What is Addition?

Addition is one of the basic mathematical operations where two or more numbers is added to get a bigger number.

The process of doing addition is also called as finding the sum.

Given that, Irma is just learning to play the Happy Fairies video game.

In the game, based on the taking care of fairies, players gain and lose points.

Initial point Irma had = -5 points

Fairy fell over in the wind and she got -3 points.

Final point = -5 + -3

                 = -5 - 3

                 = -8

Hence the total points now is -8.

To solve more problems on addition, click :

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Find the l.c.m of 200 and 45​

Answers

Answer:

the lowest common multiple of the above numbers is 1800

Step-by-step explanation:

list all multiples of the given numbers and look which number is common in both numbers and find the lowest one

Kate Sanders, a researcher in the department of biology at IPFW University, studied the effect of agriculture contaminants on the stream fish population in Northeastern Indiana (April 2012). Specially designed traps collected samples of fish at each of four stream locations. A research question was: did the differences in agricultural contaminants found at the four locations alter the proportion of the fish population by gender? Observed frequencies were as follows.a. Focusing on the proportion of male fish at each location, test the hypothesis that the population proportions are equal for all four locations. Use a .05 level of significance. What is the p-value and what is your conclusion?b. Does it appear that the differences in agricultural contaminants found at the four locations altered the fish population by gender?

Answers

Answer:

H0 : population proportion are equal

H1: population proportion are not equal

0.4779 > 0.05

Step-by-step explanation:

What is the missing side length of a right triangle with legs 4 and 6 centimeters

Answers

Answer:

7.21 cm.

Step-by-step explanation:

4² + 6² = x²

16 + 36 = x²

52 = x²

[tex]\sqrt{52} = x[/tex]

7.21 cm.

Check

The third side of a triangle is greater than the difference and less than the sum of the lengths of the two given sides.         6 - 4 = 2  and 6 + 4 = 10

So the third side is between 2 and 10.                                                                                            

Giving if you answer correctly

Answers

Explanation:

Substitute the value of the variable into the expression and simplify.

Answer:

1

look at the picture

Answers

Actually, it is positive 1/6 due to negative times a negative equalling a positive.

Uhhh... Someone help plz qwq ASAP

Answers

Answer:

x° = 58.5°

Step-by-step explanation:

90° + 31,5° + x° = 180°

121.5° + x° = 180°

x° = 180° - 121.5°

x° = 58.5°

Hope I helped you!

Answer:

31.5+90

180-a=

Step-by-step explanation:

[tex]31.5 + 90 + x = 180[/tex]

[tex]x = 180 - 121.5[/tex]

[tex]x = 58.5[/tex]

1) Given any logarithmic equation of the form logo x = y, what is the restriction on "x" and why?

Answers

Answer:

x=(h)

Step-by-step explanation:

Emily buys 3 pencils for 51p
Work out the price of 4 pencils.

Answers

Answer:

68p

Step-by-step explanation:

Emily buys 3 pencils for 51p

Work out the price of 4 pencils.

51 : 3 * 4 = 68p

Answer:

68

Step-by-step explanation:

We can write a ratio to solve

3 pencils      4 pencils

------------- = -------------

51 p                x

Using cross products

3x = 51*4

3x = 204

Divide by 3

3x/3 = 204/3

x = 68

Given that r varies directly as t^3, and r=54 when t=3. Find t when r=250

Answers

Answer:

t = 5

Step-by-step explanation:

Given r varies directly as t³ then the equation relating them is

r = kt³ ← k is the constant of variation

To find k use the condition r = 54 when t = 3 , then

54 = k × 3³ = 27k ( divide both sides by 27 )

2 = k

r = 2t³ ← equation of variation

When r = 250 , then

250 = 2t³ ( divide both sides by 2 )

125 = t³ ( take cube root of both sides )

[tex]\sqrt[3]{125}[/tex] = t , that is

t = 5

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