1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yuri [45]
2 years ago
13

you earn $3 an hour as a waitress. After working 3 hours, you earn $12, $5, and $7 in tips. How much money did you earn in total

? Explain how you found your answer.
Mathematics
1 answer:
Oksi-84 [34.3K]2 years ago
6 0
$33 Because if she works three hours and each hours she gets three dollars the that is 9 dollars plus 12 5 and 7 equals 33
You might be interested in
The altitude of a triangle is 1cm shorter than the base. If the area of the triangle is 15cm2, calculate the altitude.
WITCHER [35]

Answer:

5 cm

Step-by-step explanation:

We khow that the altitude of this triangle is 1cm shorter than the base

  • Let H be our altitude and B our base and A the area of the triangle
  • A= (B*H)/2 ⇒ 15=(B*H)/2
  • H is 1cm shorter than B ⇒ B=H+1
  • H*(H+1)/2=15 ⇒ H*(H+1)=30⇒ H²+H=30⇒H²+H-30+0

that's a quadratic equation . Let's calculate the dicriminant .

Let Δ be the dicriminant

  • a=1
  • b=1
  • c= -30
  • Δ=b²-4*a*c = 1²-4*1*(-30)=1+4*30=121≥0
  • Δ≥0⇔ that we have two solutions x and y
  • x= (-1-\sqrt{121})/2= (-1-11)/2= -6
  • y= (-1+\sqrt{121})/2= 10/2 = 5

We have a negative value and a positive one

The altitude is a distance so it can't be negative

H= 5cm

6 0
3 years ago
The graph below represents the amount of change Jaxon would receive, y, if he bought a item with a cost of x.
alexira [117]

Answer:

I don't really understand the question

Step-by-step explanation:

I don't know the answer

4 0
3 years ago
Sharon is twice as old as Brian, and in 5 years the sum of their ages will be 25 years. Find their present ages.
Vinil7 [7]
Sharon's age= 2x
Brian's age= x

(2x-5)+(x-5)= 25
3x-10=25
3x=15
x=5
Brian is 5 years old and Sharon is 10

3 0
3 years ago
From an industrial area 70 companies were selected at random and 45 of them were panning for expansion next year. Find 95% confi
Lana71 [14]

Answer:

Confidence limit = [52.8%, 75.2%]

Step-by-step explanation:

P=\frac{45}{70}= 0.64

(1-P)=1-0.64=0.36

n= 70

P ± z \sqrt{\frac{P(1-P)}{n} }

where the value z will be taken from the z-table for 95% confidence interval

1-0.95= 0.05/2= 0.025

0.95+0.025= 0.0975

From the z-table the value of z corresponding to 0.0975 is 1.96

0.64 ± 1.96 \sqrt{\frac{0.64*0.36}{70} }

0.64 ± 1.96 (0.057)

0.64 ± 0.112

64%% ± 11.2%

so the confidence interval is

64+11.2=75.2%

64-11.2=52.8%

[52.8, 75.2]

8 0
3 years ago
The table shows four numbers. -34<br>-0.4 0.4 ​
kvv77 [185]

Answer:

What do you have to do with the numbers

3 0
3 years ago
Other questions:
  • Are all irrational numbers real numbers. If so , why
    7·1 answer
  • Kesia knows that 1/4=0.25. Explain how she could use this fact to determine the decimal equivalent of 5/8
    13·2 answers
  • Write the equation of the line in point-slope form.<br><br> (-3,2) and (-1,-2)
    6·1 answer
  • The height of a triangle is 4 m less than its base. The area of the triangle is 48 m^2.
    9·1 answer
  • At basketball practice you made 21 out of 80 shots.
    10·2 answers
  • Show that a triangle with vertices at (3,5), (3, 2),<br> and (2,5) is a right triangle.
    10·1 answer
  • A flower bed is in the shape of a triangle with one side twice the length of the shortest? side, and the third side is 1616 feet
    7·1 answer
  • If f(x) = 3x - 1, find f(10).
    11·2 answers
  • Two trains leave stations 456 miles apart at the same time and travel toward each other. One train travels at 105 miles per hour
    5·1 answer
  • How do i graph this equation y=x+3
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!