Two mechanics worked on a car. The first mechanic charged $55 per hour, and the second mechanic charged $90 per hour. The mechanics worked for a combined total of 25 hours, and together they charged a total of $1900. How long did each mechanic work?

Answers

Answer 1
55x+90y=1900
x+y=25, x=25-y
55(25-y)+90y=1900
1375-55y+90y=1900
35y=525
y=15
So it is 15 for the 90$ and 10 for the 55$

Related Questions

1. -10(-0.32 - 0.2)
Plz help

Answers

Answer:

5.2 would be the answer

How many copies of 1 twelfth are equivalent to 3 sixths? Help!

Answers

Answer:

6/12 is equal to 3/6 ( 6 twelfths is equal to 3 sixths )

Step-by-step explanation:  

multiply both sides of 3/6 by 2 to get the same denominator, doing that will get you 6/12

Answer:

6 copies

Step-by-step explanation:

Step 1:  Convert 1 twelfth to an expression

1 twelfth is the same thing as 1/12

Step 2:  Convert 3 sixths to an expression

3 sixths is the same thing as 3/6

Step 3:  Get common denominators

The lowest common denominator between 1/12 and 3/6 is 12

[tex]\frac{1}{12}[/tex] → [tex]\frac{(1 * 1)}{(12 * 1)}[/tex] → [tex]\frac{1}{12}[/tex]

[tex]\frac{3}{6}[/tex] → [tex]\frac{(3 * 2)}{(6*2)}[/tex] → [tex]\frac{6}{12}[/tex]

Step 4:  Find the amount of 1/12 there are in 6/12

In order to find out the copies, we need to add 1/12 x amount of times to get 6/12.  We find that x is going to be 6.  Therefore, there 6 copies.

[tex]\frac{1}{12}+\frac{1}{12}+\frac{1}{12}+\frac{1}{12}+\frac{1}{12}+\frac{1}{12} = \frac{6}{12}[/tex]

Answer:  6 copies

which measurement uses square units​

Answers

Answer:

Area

Step-by-step explanation:

because

area :) hope this helps

Rule: y=x+2/3
y=2 x=?

Answers

Answer:

y=x+

-2/3

Step-by-step explanation:

y=x+

2

3

Step 1: Flip the equation.

x+

2

3

=y

Step 2: Add (-2)/3 to both sides.

x+

2

3

+

−2

3

=y+

−2

3

x=y+

−2

3

Find the distance between P and Q. P(-3, -4), Q(6, -7)

Answers

Answer:

Please find attached pdf

Step-by-step explanation:

Step-by-step explanation:

P=(-3,-4)=(X1,Y1)

Q=(6,-7)=(X2,Y2)

Pq=root under( x2-x1)^2+(y2-y1)^2

= root under {6-(-3)}^2+{-7-(-4)}^2

= {6+3}^2+{-7+4}^2

= 9^2+(-3)^2

= 81+9

= 90

= 3root under10 unit.#

Select all the expressions that are equivalent to 12n + 8.
A. 3n + 4 + 3 + 4 + 4n
B. 11n - 4 + 0 + 12
C. 6(6n + 2)
. D. 4(3n+2)
E. 4n + 12-23 + 8n

Answers

Answer:

D and B and E

1/2 x 1 2/3 write the answer as a fraction or as a whole or mixed number

Answers

Answer:

5/6

Step-by-step explanation:

Can someone please help me...

Answers

X=6 y=13


Cvbgfssvbjj

what is x? x/9= -5

pls helpppp ​

Answers

Answer:

x= -45

Step-by-step explanation:

x/9=-5

multiply each side by 9

x=-45

Answer:x=−45

Step-by-step explanation:

Triangle ABC is a right triangle.
.
mZA = 50°
mZB= (32 – 4)
mZC= 90°
What is the value of x?
Hurry!!!! Thanks you

Answers

Answer:

mZA=50

mZB=28

mZC=90

value of x is 28 how i got it was 32-4.

8b+3=35. when solving for B what is ur first step ​

Answers

Answer:

Put B on the one side, then the numbers go on the other side

4. Solve this equation for x. Please show work. 4√x + 3 + 3 = 15​

Answers

Answer:

i don't know sorry b a b y g i r l

Step-by-step explanation:

help me pleeess.need help for math

Answers

The ratio is 4 to 5.
So the answer is 25

Answer:

u are math

Step-by-step explanation:

In a normal distribution, 68% of the data fall within how many standard
deviations of the mean?
A. Two standard deviations
B. One standard deviation
C. It cannot be determined from the given information.
D. Three standard deviations

Answers

B, my teacher just taught us this :)

In a normal distribution of data, 68% of the data fall within one standard deviations of the mean.

What do you mean by normally distributed data?

Normally distributed data is the distribution of probability which is symmetric about the mean.

The mean of the data is the average value of the given data.The standard deviation of the data is the half of the difference of the highest value and mean of the data set.

According to the empirical rule, also known as 68-95-99.7 rule, the percentage of values that lie within an interval with 68%, 95% and 99.7% of the values lies within one, two or three standard deviations of the mean of the distribution.

[tex]P(\mu - \sigma < X < \mu + \sigma) = 68\%\\P(\mu - 2\sigma < X < \mu + 2\sigma) = 95\%\\P(\mu - 3\sigma < X < \mu + 3\sigma) = 99.7\%[/tex]

Here the mean of distribution of X is [tex]\mu[/tex]  and standard deviation from mean of distribution of X is [tex]\sigma[/tex].

Thus, in a normal distribution of data, 68% of the data fall within one standard deviations of the mean.

Learn more about the normally distributed data here;

https://brainly.com/question/6587992

#SPJ2

Add: look at the picture

Answers

Answer:

5 3/4

Step-by-step explanation:

the 3/4 is a fraction

Have a nice day:)

Answer:

5 3/4

Step-by-step explanation:

2 + 2/3 + 3 + 1/12

2+3= 5

2/3 + 1/12 <<-- Find the LCD

8/12 + 1/12 = 9/12 <-- Reduce the fraction

9/12 = 3/4

5 + 3/4 = 5 3/4

15n+24-4(n-3)+6-2n=105

Answers

Answer:

n = 7

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

Question: 15n+24-4(n-3)+6-2n=105

Answer:  3 • (3n + 14)

Explanation:

STEP 1: Restate

Equation at the end of step 1

 (15n + 24) -  4 • (n - 3)) +  6) -  2n

STEP 2: Pulling out like terms

STEP 3: Pull out like factors :

9n + 42  =   3 • (3n + 14)

Final result :

 3 • (3n + 14)

Hope this helps~

A locker door is 13 inches wide by 27 inches tall. A company will use a scale factor of 2.5 to change the dimensions
of the door. What will be the new height of the locker door?

Answers

Answer:67.5

Step-by-step explanation:The question asked the HEIGHT. So multiply the scale factor (2.5) and the inches tall (27).

Suppose that Upper X has a discrete uniform distribution f left-parenthesis x right-parenthesis equals StartLayout left-brace1st Row 1st Column 1 divided by 3, 2nd Column x equals 1,2,3 2nd Row 1st Column 0, 2nd Column otherwise EndLayout A random sample of n equals 33 is selected from this population. Find the probability that the sample mean is greater than 2.1 but less than 2.4. Express the final answer to four decimal places (e.g. 0.9876).

Answers

Answer:

the probability that the sample mean is greater than 2.1 but less than 2.4 is 0.2444

Step-by-step explanation:

Given the data in the question;

x        f(x)         xp(x)               x²p(x)

1         1/3        0.33333        0.33333

2        1/3        0.66667        1.33333

3        1/3        1.00000        3.0000

∑                    2.0000          4.6667

∑(xp(x)) = 2

∑(x²p(x)) = 4.6667

Variance σ² = ∑(x²) - ∑(x)² = 4.6667 - (2)² = 4.6667 - 4 = 0.6667

standard deviation σ = √variance = √0.6667 = 0.8165

Now since, n = 33 which is greater than 30, we can use normal approximation

for normal distribution z score ( x-μ)/σ

mean μ = 2

standard deviation = 0.817

sample size n = 33

standard of error σₓ = σ/√n = 0.817/√33 = 0.1422

so probability will be;

p( 2.1  < X < 2.4 ) = p(( 2.1-2)/0.1422) <  x"-μ/σₓ  <  p(( 2.4-2)/0.1422)

= 0.70 < Z < 2.81    

=  1 - ( 0.703 < Z < 2.812 )

FROM Z-SC0RE TABLE

=  1 - ( 0.25804 + 0.49752 )

= 1 - 0.75556

p( 2.1  < X < 2.4 ) = 0.2444

Therefore,  the probability that the sample mean is greater than 2.1 but less than 2.4 is 0.2444

Solve for x please show work

Answers

Answer:

x = 3

Step-by-step explanation:

The 2nd polygon is 1.5 times larger.

12 x 1.5 = 18

18-6 = 12

12/4 = 3

x = 3

Harold and Maude plan to take a cruise together, but they live in separate cities. The cruise departs from Miami, and they each book a flight to arrive in Miami an hour before they need to be on the ship. Their travel planner explains that Harold's flight has an 80% chance of making it on time for him to get o the ship and that Maude's flight has a 90% chance of making it on time. Assume that the event of Harold making it on time is independent of the event of Maude making it on time. What is the probability that at least one of Harold and Maude will make it to the cruise

Answers

Answer:

98% probability that at least one of Harold and Maude will make it to the cruise

Step-by-step explanation:

Independent probabilities:

When two events are independent, the probability of the two events happening simultaneously is the multiplication of each probability.

Probability that none makes it to the cruise:

Harold's flight has an 80% chance of making it, so 100 - 80 = 20% probability of missing.

Maude's flight has a 90% chance of making it on time, so 100 - 90 = 10% probability of missing.

Both missing: 0.2*0.1 = 0.02.

2% probability of both missing.

Probability that at least one makes it to the cruise:

Either both miss, or at least one makes it. The sum of the probabilities of these events is 100%. So

2 + p = 100

p = 98%

98% probability that at least one of Harold and Maude will make it to the cruise

1. Harpreet bought 1 L of mustard oil,
1 L 500 mL of sunflower oil and
250 mL of olive oil. How much oil
did she buy?​

Answers

1750 ml

To do this question could could convert the 1 L of mustard oil into millilitres which is 1000 ml Athena you add them all up so 1000+500+250=1750mL

Last month,Marco's neighbors paid him to take care of their fish when they went on vacation. He spent $5 on his earnings on an after snack and $16 on a new book. Afterward,he had no more then $9 left. How can you beat describe how much Marco's neighbors paid him?

Answers

Answer:

$30

Step-by-step explanation:

5+16=21+9=30

Please I need help it’s an emergency

Answers

Answer:

32[tex]\sqrt{2}[/tex]

Step-by-step explanation: Feel free to ask questions wanted to answer quick so you wouldn't end up being too late!

A polynomial is graphed. What could the equation of p?
P(c)=(x+3)(c+1)(2x+1)

Answers

Answer:

The answer is B.) p(x)=x(x−2)(2x−7)

Step-by-step explanation:

Khan academy

Exponential function: f(x) = 5 ∗ [tex]3^{x}[/tex]
1. Make the table of values with at least 5 points.
2. Graph the function
3. Is the function increasing or decreasing?
4. What is the domain and range of the function?

Logarithmic function: g(x) = log3 + 2
1. Make the table of values with at least 5 points.
2. Graph the function
3. Is the function increasing or decreasing?
4. What is the domain and range of the function?

Answers

Answer:

See below.

(I only answered the first one b/c the second log function doesn't really make sense, sorry!)

Step-by-step explanation:

1. f(x) = 5 × [tex]3^{x}[/tex]

Plug in 5 points.

x = -2, f(x) = [tex]\frac{5}{9}[/tex]

x = -1, f(x) = [tex]\frac{5}{3}[/tex]

x = 0, f(x) = 5

x = 1, f(x) = 15

x = 2, f(x) = 45

2. Attached below.

3. Increasing

4. Domain: x = all real numbers

Range: f(x) > 0 (because the line never goes below the x-axis)

Between what two days was the Increase in texting the largest?


Wednesday to Thursday
Friday to Saturday
Sunday to Monday
Thursday to Friday
Help please

Answers

thursday to friday
hope that helps xxo

Answer:

Thursday to Friday

Step-by-step explanation:

as its the greatest in size and the biggest

Hope it helps XD

If y = 0.5x + 1 and x = 2, what Is y?

Answers

Answer: 2

Explanation:
y = 0.5x + 1
y = 0.5(2) + 1
y = 1 + 1
y = 2

pleasee i need help pleaseeee help nowww​

Answers

Answer:

t > 2.5

Step-by-step explanation:

Here are two paint mixtures: • 3 cups of white and 4 cups of blue. • 6 cups of white and 8 cups of blue. Both mixtures make the same color because they are in equivalent ratios. Which of these mixtures is also in an equivalent ratio? 5 cups white 6 blue 1 white 1 1/2 blue 4 white 3 blue 1.5 white 2 blue. HELP MEH

Answers

The mixture that is an equivalent ratio is:

1.5 white 2 blue is the answer to the question

Here are two paint mixtures: • 3 cups of white and 4 cups of blue. • 6 cups of white and 8 cups of blue. Both mixtures make the same color because they are in equivalent ratios. Which of these mixtures is also in an equivalent ratio? 5 cups white 6 blue 1 white 1 1/2 blue 4 white 3 blue 1.5 white 2 blue.

Can someone help me it’s due tomorrowwwww

Answers

Number one is straight angle

number two is obtuse

number three is acute

Number 4 is acute

number 5 is a right angle

number 6 is obtuse

number 7 is right angle

number 8 is obtuse

Other Questions
aundreys mother has decided to start a college savings account for him. aundrey is about to start kindergarten, and she decides to deposit $1000 in to an account with a 1.3% annual interest rate. How much will be in the account when aundrey starts 4th grade (4 years later) if she makes no deposits or withdrawals and the interest is compounded annually?a) $27,984.10b) $1,630.47c) $1,053.02d) $949.01 Please help!! Will give brainliest!!!Is the function f(x) = 5x2 even or odd? Why? Humans become part of the carbon cycle when theyA. breathe in carbon dioxide,B. release carbon as a waste product,C. produce new carbon compounds in their cells, what is the term for a word that gives information about verbs, adjectives, and other adverbs?A. AdverbB. NounC. AdjectiveD. Pronoun (9 +40) + (5 +2b) simplify answer. Which best represents a balanced equation Sighient Store10.7%Resources0%Question 3 of 2805056EB85B9..>Tect0%rrectIMG_90The accompanying table contains the individual demand schedules of dark chocolate for Vanessa and Angela. Assumingthey are the only people in the market for dark chocolate, place each of their individual demand curves and the marketdemand curve at the correct locations on the accompanying graph.Price of darkPounds of dark chocolate Pounds of dark chocolatechocolatedemanded by Vanessademanded by Angela(per pound)$813%IMG 9000%$135orrect0%Market for Dark Chocolate100%VanessaAngelaMarket90%about uscareers privacy policy terms of use contact us help Who is the head of the household in a Hispanic family?1. abuelo2. hijo3. padre 4. madre What is the equation of the circle with a radius of 4 and a center at (3, 2) ? Which of the following species characteristics would magnify the damage caused by the overfishing of a population?Select one:a. Low reproductive rateb. Rapid growth ratec. Reaching maturity quicklyd. Short life cycle A snack and a _______ serve the same purpose: to eat something light before a strong meal.topcattailcidernap A circle has a diameter of 16 centimeters.What is the best approximation of its area?Use 3.14 to approximate for .Question 7 options:803.84 cm250.24 cm2200.96 cm2 Find the unknown side length, x. Write your answer in simplest radical form. A. 3 B. Sqrt 34 C 6 D.Sqrt 41 Please select the best answer from the choices provided PLEASE HELP I DON'T UNDERSTAND THIS!!! PLEASE HELP~ Read the sentences below. They are the first part of a summary of the article. Atoms are the building blocks of everything. They are too tiny to be seen. Atoms are made up of electrons, protons and neutrons. Which answer BEST completes the summary? A Each atom has a special number and element B Each atom has some oxygen and hydrogen. Each atom has an atomic number of 1. D Each atom is made up of 100 elements. What is the surfsce area of the prism with 12 cm 11 cm and 10,cm convert 0.881 mol N2 at STP to volume in liters Discuss Pierre-Auguste Renoirs evolving Impressionist style in The Bathers, and explain why he changed his style. in 2008, engineers at nasa developed the Fermi gamma ray telescope. gamma rays come from the most extreme places in the universe. NASA is studying them because scientists want to learn more about environments in the universe that make gamma rays. this includes objects such as exploding stars. the photograph below is an image taken using the Fermi gamma ray telescope. using the information above, along with your knowledge of the electromagnetic spectrum column where should the Fermi going rate telescope be placed to enable the highest quality images to be recorded by this telescope? A. orbiting in space somewhere outside earth's atmosphere. B at the top of a tall mountain away from all sources of light pollution. C any area on Earth that will allow enough room for a large satellite dish. or D. two opposite locations on earths surface are required, including the north and south pole. Which of the following is a perfect square?A.) 115B.) 169C.) 154D.) 279