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
Alexxx [7]
3 years ago
7

going into the final exam, which will count as two tests, amelia has test scores of 77 84 70 59 and 92. what score does amelia n

eed on the final in order to have an average score of 80?
Mathematics
1 answer:
Fudgin [204]3 years ago
6 0

Answer: 85 is your answer

Step-by-step explanation:

You might be interested in
An engineer is planning a new water pipe installation. The circular pipe has a diameter of d=20\text{ cm}d=20 cmd, equals, 20, s
aivan3 [116]

Answer: The answer is 314.28 cm² (approx.).


Step-by-step explanation:  Given that an engineer is going to install a new water pipe. The diameter of this circular pipe is, d = 20 cm.

We need to find the area 'A' of the circular cross-section of the pipe.

Given, diameter of the circular section is

\textup{d}=20~\textup{cm}.

So, the radius of the circular cross-section will be

\textup{r}=\dfrac{\textup{d}}{2}=\dfrac{20}{2}=10~\textup{cm}.

Therefore, cross-sectional area of the pipe is

\textup{A}=\pi \textup{r}^2=\dfrac{22}{7}(10)^2=\dfrac{2200}{7}=314\dfrac{2}{7}=314.28~.~.~.~\textup{cm}^2.

Thus, the answer is 314.28 cm² (approx.).

4 0
3 years ago
A ball is thrown in the air from a height of 3 m with an initial velocity of 12 m/s. To the nearest tenth of a second, how long
stepladder [879]

Answer:  1.4 seconds

<u>Step-by-step explanation:</u>

The equation is: h(t) = at² + v₀t + h₀          where

  • a is the acceleration (in this case it is gravity)
  • v₀ is the initial velocity
  • h₀ is the initial height

Given:  

  • a = -9.81 (if it wasn't given in your textbook, you can look it up)
  • v₀ = 12
  • h₀ = 3

Since we are trying to find out when it lands on the ground, h(t) = 0

EQUATION:   0 = 9.81t² + 12t + 3

Use the quadratic equation to find the x-intercepts

                        a=-9.81, b=12, c=3

x=\dfrac{-b \pm \sqrt{b^2-4ac}}{2a}\\\\\\x=\dfrac{-(12)\pm \sqrt{(12)^2-4(-9.81)(3)}}{2(-9.81)}\\\\\\x=\dfrac{-12\pm 16.2}{-19.62}\\\\\\x=\dfrac{-12+ 16.2}{-19.62}=-0.2\qquad x=\dfrac{-12- 16.2}{-19.62}=\large\boxed{1.4}\\

Note: Negative time (-0.2) is not valid

4 0
3 years ago
What is 4(1-2b)+7b-10
shutvik [7]

Answer:

-6-b

Step-by-step explanation:

4(1-2b)+7b-10

Multiply what's in parantheses

4(1)=4

4(-2b)=-8b

4-8b+7b-10

Combine like terms

4-10 -8b+7b

-6-b

Hope this helps :)

6 0
3 years ago
Decorations for a seventh-grade dance take 1/6 of the student council's budget. entertainment takes 3/8 of the budget. what frac
defon

Answer:

11/24 is left over

Step-by-step explanation:

1/6 + 3/8 = 13/24

24/24 - 13/24 = 11/24

11/24 of the budget is left over

Hope this helps

5 0
3 years ago
Read 2 more answers
Order -5,-7,0,4 from least to greatest
Serhud [2]

Answer:-7,-5,0,4

Step-by-step explanation:

The “bigger” negatives are least then the “smaller” negatives are greater than that. Then the 0 because it is between negatives and positive. Lastly, the positive 4 is the greatest.

4 0
3 years ago
Other questions:
  • The digit with the greatest value 6789
    5·2 answers
  • Solve for x<br> 20% of x = 100
    14·1 answer
  • Can someone help me plz
    9·1 answer
  • Write the equation in slope-intercept form. y + 2 = 3(x - 4)
    10·1 answer
  • Can someone help with a really simple median question? tbh i really don't know it :(
    10·2 answers
  • Help pleaseeeeeeeeeeeee
    7·2 answers
  • What is the missing angle measure
    9·1 answer
  • Simplify: -2 1/3 - (- 10 1/6)
    8·2 answers
  • You kept track of the numbr of minutes you spent on homework for one week. 18, 20, 22, 11, 19, 18, 18 What is range of minutes y
    7·1 answer
  • The following table shows how far a bus has gone in t hours. Which of the following equations represents this information?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!