Mathematics High School

A plumber charges $50 for a house call plus $40 for each hour worked. Let h represent the number of hours worked. Write an expression that shows how much the plumber charges for a job lasting h hours. Then find how much the plumber charge for a job lasting 3 hours.

Answers

Answer 1

Answer:

x = 50 + 40h

Step-by-step explanation:

Related Questions

I need help ASAP
Does this show a function please explain

Answers

Answer:

where is the dot, I Bileve it is no.

.prove that cos (90-A).sinA + sin(90 - A).cosA = 1

Answers

Answer:

See Explanation

Step-by-step explanation:

[tex]cos (90-A).sinA + sin(90 - A).cosA = 1 \\ \\ LHS = cos (90-A).sinA + sin(90 - A).cosA \\ \\ = sinA.sinA + cosA.cosA\\ \\ = sin ^{2} A + cos^{2} A \\ \\ = 1 \\ \\=RHS\\\\ reason \\ cos (90- \theta) = sin \theta \\ sin (90- \theta) = cos \theta \\ sin ^{2} \theta + cos^{2} \theta = 1 \\ \\ thus \: proved \\ [/tex]

There are three brothers in the Howard family, Daryl, Malik, and Terrance, whose ages add up to 38 years. Daryl is 3 times as old as Malik, and Terrance is 4 years younger than Daryl. How old is Malik?

Answers

Answer:

Malik years is 37......

Solve the system of equations:
y= -x + 9
y = - 3x + 8
X=

Answers

27 i believe
you would substitute y with 0 to find x then you would put 9 in for x to find y then you would go back to the first equation and put -19 in for y and then solve for x and get 27

Solve the equation.
=11
O A. 19
OB. 44
OC. 64
OD. 88
Help asap

Answers

The answer is A most likely

#2 Rewrite this expression in standard from. (y-2) = 3(x + 1) O 3x - y = -5 0 4x + y = 2 O x + y = 5 0-3x + y = 5 Next >

Answers

Answer:

Step-by-step explanation:

Answer:

It is -3x + y = 5

Step-by-step explanation:

So the answer is D

Evaluate the expression for p = 4, q = 2, and r = 1.
(−p)^2q^-2

Answers

Answer: 16sqrt(2)

Explanation:

(-p)^2q^-2
= (-4)^2 x 2^-2
= 16 x sqrt(2)
= 16sqrt(2)

Need help??????!!!!!!!!!

Answers

Answer:

The answer for question 27 is a confusing one, but the one for question 28 is B! Hope this helps.

Step-by-step explanation:

The sum of two numbers is 10. The larger number is 4 times the smaller number. What are the two numbers? Let x = the smaller number. Lety = the larger number. Which two equations represent the system for this word problem? Equation 1: Equation 2:

Answers

4(2)+2=10

X=2

Y=8

X+y=10

Y=4x

Give 1 other example where quadratics (parabolas) might
be used by a career?

Answers

Answer:

Agriculture

Step-by-step explanation:

Quadratic equations are also used in agriculture. One of these uses is in finding out the optimal arrangement of boundaries to produce the biggest fields and pens given the materials on hand. Area is the length of a surface multiplied by its width. This turns calculations involving areas into quadratic equations.

Your father gave you $8.82 to buy a present. This covered 7/9 of the cost. How much did the present
cost?

Answers

Answer:

$6.86

Step-by-step explanation:

Answer:

$11.34

Step-by-step explanation:

8.82 x 9/7 = 11.34

This means 8.82 is 7/9 of 11.34

The present costs 11.34 dollars

PLEASE HELP! MATH!

Answers

t = 12r/(r+120)

t(r+120) = 120r

tr+120t = 120r

tr-120r = -120t

r(t-120) = -120t

r = -120t/(t-120)

r = 120t/(120-t)

Which of the functions below is a linear function? y=x-7 y= 1 / - 7 y=x² - 7 y=1x1-7

Answers

Answer:

y=x-7

Step-by-step explanation:

the rest are squared which means that they are parabolas. The last one has multiplication.

Please help me out with this question please

Answers

4-3x=+10 pls mark brainliest

4-3*x=x+10 hope this helped

The Biology Club has 45 members, 35 girls and 10 boys. What is the ratio of
girls to boys in the Biology Club?
A. 7:2
B., 8:3
C. 2:7
SUBMIT

Answers

Answer is A because as you se they have 45 members, 35 girls and 10 boys and you remember because i done it before

Answer:

B- 7:2

35:10 simplifies to 7:2

Please very urgent please give me a correct answer!

Answers

Answer:

20%, 40%, 60%, 80%

Step-by-step explanation:

The correct order should be:
0 to 1/10 to 2/10 to 3/10 to 4/10 to 5/10 to 6/10 to 7/10 to 8/10 to 9/10 then to 1.

Slope : 4.
Point : (-10, 30)

Really need help on this please

Answers

You need to find b by substituting x and y.
y=Mx+b
30=4(-10)+b
b=-10

Answer is the last one.

Evaluate: 792.6 ÷ 10-4

remember it is not 10-4. it is 10 to the -4 power

Answers

Answer:

792600

Step-by-step explanation:

For this question you can add four zeroes to the back of 792.6 andmove the decimal to get you the answer, hope this helps

It's also good to know that if the exponent was positive the answer would be 0.07926

SOLUTION STEPS

10 ^−4/792.6

Calculate 10 to the power of −4 and get

10000

792.6

Divide 792.6 by

10000

by multiplying 792.6 by the reciprocal of

10000

792.6×10000

Multiply 792.6 and 10000 to get 7926000.

7926000

hopefully i helped

If 3 sodas cost $6. What is the cost cans of corn cost $16. What is the cost per can? per soda? If 8 tacos cost $12. What is the cost for 12 tacos? Priya can bike 300 meters in 20 seconds. How many meters can she bike in 10 seconds? A recipe calls for 0.8 oz of cheese. If ! make 35 batches of this recipe, how many ounces of cheese do I need? If one item cost $0.75 and I paid $2.25 at the register, how many items did I buy? If one item cost $0.79 and I paid $3.16 at the register, how many items did I buy? A puppy weighs 3 lbs at 10% of its adult weight. How many lbs will the puppy be when it is 60% of its weight? If I can read 54 pgs in 3 days, how many can I read in 1 day? 7 notebooks cost $21. How much for 5 notebooks? 1/5 of 45 is what number? Twelve waters cost $9. How many can you buy with $3? 9 is what percent of 90? 2 tickets cost $14. How many tickets can you buy with $63? If 40% is $2.00, how much is 100%? Lin paid $94 for 6 meals. How much would 9 meals cost? A cake calls for 25 cups of sugar. If1 use 225 cups of sugar, how many batches did I make? 9 is 75% of what number?

Answers

Answer:

dont mind me just tryna figure this out ignore till i figure it

Step-by-step explanation:

Please anyone help!!

Answers

Answer:

the answers -49

Step-by-step explanation:

What is the slope and equation of a line parallel to the x-axis passing through point (3, 7)?

Answers

Answer:

i not sure

Step-by-step explanation:

i need points

The ratio in simplest form

Answers

It’s already in it’s simplest form!

evaluate the piecewise function

Answers

Answer:

f(-7) = -6

f(10) = 9

Step-by-step explanation:

Because -7 is less than 0 you can use the top equation -7 + 1 to get 6

Because 10 is greater than 0 you can use the bottom equation 10 - 1 to get 9

Solve the system of equations by substitution. y = 2x y = x +1

Answers

Step-by-step explanation:

y = 2x

y = x + 1

y-1 = x

y = 2x

y = 2 (y - 1)

y = 2y - 1

y = -1

The difference of a number and 8 is 46 less the number. Find the number

Answers

Answer:

unsolvable

Step-by-step explanation:

n-8=46-n

n=(46-n)+8

n=54-n

Answer:

Step-by-step explanation:

you add 8+46 and you can check with 54-46=8

Levi read 4 books in 16 months. What was his rate of reading in months per book?

Answers

4/16 = 0.25 books per month

Answer:

0.25

Step-by-step explanation:

Simplify the expression:
(1 + 3.2d)(7)

Answers

Answer:

7+22.4d

Step-by-step explanation:

(1 + 3.2d)(7)

7+7×3.2d

Simplify

7+22.4d

Hope this helped :) (please mark brainliest)

Answer:

22.4d+7

Step-by-step explanation:

Help me plz the real answer??!!

Answers

Answer:

(x-1)2 = -10

Step-by-step explanation:

I'm not smart can someone please help me...?

Omar drove 420 miles using 18 gallons of gas. At this rate, how many gallons of gas would he need to drive 375 miles?

Answers

Answer:

420/18= 23.3 miles per gallon rounded

375/23= 16.3(rounded) if you want an exact number

17 gallons of gas

Step-by-step explanation:

Solve for x
Please show the steps
The answer is 10

Answers

Answer:

x = 10

Step-by-step explanation:

Since ΔCDE ~ ΔQRS, we can find the actual length of x + 8 first before finding the value of x.

Length of x + 8 = [tex]\frac{12}{20}[/tex] × 30

= 18

x + 8 = 18

x = 18 - 8

x = 10

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