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
IrinaK [193]
2 years ago
6

The average of 5 quiz grades is 10. When the lowest grade is dropped and the new average is calculated, it turns out to be 11. W

hat was the score of the dropped grade?
Mathematics
1 answer:
V125BC [204]2 years ago
4 0

Answer:

The score of the dropped grade is 6

Step-by-step explanation:

To find the average of a set of numbers you need to add all the numbers and divide by how many numbers there are. The problem wants you to solve it in reverse. Let put this into an algebraic equation with a, b, c, d, and e being the variables of the test scores

(a+b+c+d+e)/5=10

Then we can multiply both sides by 5 and get

a+b+c+d+e=50

Lets assume that c is the lowest test score. To calculate the average of that we get

a+b+d+e/4=11

Doing the same thing, we know that a+b+d+e=44

Now compare the two:

a+b+c+d+e=50

a+b+d+e=44

We can now know that c=50-44=6

So, 6 is the score of the dropped quiz. Hope that helped!

You might be interested in
What is an integer for negative four
Goshia [24]
A integer for -4 would be +4
7 0
3 years ago
Write an equation (-2, 10), (10, -14)
Brilliant_brown [7]

\bf (\stackrel{x_1}{-2}~,~\stackrel{y_1}{10})\qquad (\stackrel{x_2}{10}~,~\stackrel{y_2}{-14}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{-14}-\stackrel{y1}{10}}}{\underset{run} {\underset{x_2}{10}-\underset{x_1}{(-2)}}}\implies \cfrac{-24}{10+2}\implies \cfrac{-24}{12}\implies -2

\bf \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{10}=\stackrel{m}{-2}[x-\stackrel{x_1}{(-2)}]\implies y-10=-2(x+2) \\\\\\ y-10=-2x-4\implies y=-2x+6

5 0
3 years ago
what do I do on C it says assess the reasonableness of your answer in B and use your estimate from A to explain
poizon [28]
I think that the answer is B<span />
5 0
3 years ago
How many triangles can you construct with the angle measures of 50, 70, and 100?
lidiya [134]

Answer:

0

Step-by-step explanation:

You can't construct any triangles with those angles. Because when you add all the angles of a triangle, it has to add up to 180. But when we add 50,70, and 100, it equals 220. So you can't construct any triangles.

Hope this helps.<em> (If it does, please mark me brainliest)</em>

6 0
3 years ago
Which expression is equivalent to square root 55x^7 y^6/11x^11 y^8? Assume x &gt; 0 and y &gt; 0.
morpeh [17]
The first step for solving this expression is to reduce the fraction with 11.
\sqrt{ \frac{5 x^{7} y^{6}  }{ x^{11}  y^{8} } }
Now reduce the fraction with x^{7}.
\sqrt{ \frac{5 y^{6} }{ x^{4} y^{8}  } }
Reduce the fraction one more time with y^{6}.
\sqrt{ \frac{5}{ x^{4} y^{2}  } }
To take the root of a fraction,, we must take the root of the numerator and denominator separately. This rule will change the expression to the following:
\frac{ \sqrt{5} }{ x^{2} y}
Since we cannot simplify this fraction any further,, the final answer is going to be \frac{ \sqrt{5} }{ x^{2} y}.
Let me know if you have any further questions.
:)
3 0
3 years ago
Read 2 more answers
Other questions:
  • The y-intercept of G(x) in G(x)=3x-2 is ?<br><br> A:(0,-2)<br> B:(0,0)<br> C:(2/3,0)
    8·1 answer
  • If the circle in the diagram revolves about the vertical dashed line, which type of geometrical shape will it generate?
    9·1 answer
  • In 2525 hour, Matt can type 4545 page.
    14·2 answers
  • (10x2 + 99x – 5) ÷ (x + 10) =
    10·1 answer
  • What is defined using the undefined terms point and line?
    14·1 answer
  • List of 412 multiples of seven
    15·2 answers
  • What is the distance between <br> (0,−1) and (3,−5)
    10·1 answer
  • Help me with my test
    8·2 answers
  • What is the solution of the equation −14+2x+3=4x−13−7x?
    5·2 answers
  • 3 eggs weigh 120grams total. Assume each egg weighs the same, what is the Constant of Proportionality?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!