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
yulyashka [42]
3 years ago
6

Deanna gets 3 problems incorrect on her math quiz and scores 85%. How many questions were on the quiz?

Mathematics
1 answer:
katrin2010 [14]3 years ago
5 0

Answer:

There were 20 questions on the quiz

Step-by-step explanation:

In this question, we are concerned with knowing the number of questions on a quiz, given that Deana had a certain percentage after scoring an amount of marks.

We proceed as follows;

Let the number of questions on the quiz be X.

Now, she got 85% by making 3 incorrect choices. This means the percentage of questions she got incorrectly would be 100-85 = 15%

what we are saying is that it is just 15% of her questions that were wrong.

This mathematically;

15% of x = 3

15/100 * x = 3

15x = 3 * 100

15x = 300

x = 300/15

x = 20

You might be interested in
Does this table represent a function? Why or why not?
artcher [175]

Answer:

NO. B is the answer

Step-by-step explanation:

because there are two of the same x values, causing there to <u>not</u> form a straight line.

<em><u>Hope this helped! Have a nice day! Plz mark as brainliest!!! :D</u></em>

<em><u>-XxDeathshotxX</u></em>

5 0
2 years ago
Geometry question plz help
saw5 [17]

Answer:

I think it would be 85 degrees.

6 0
3 years ago
Write an expression in factored form for the polynomial of least possible degree graphed below.
dexar [7]

Answer:

- 1/64 (x+4)² (x-3) (x-4) = 0

Step-by-step explanation:

f(x) = a (x+4)²(x-3)(x-4)   ... curve touch (-4,0) and not cross x axis

x=0   f(x) = -3

a (4)² * (-3) * (-4) = -3

a = - 1/64

- 1/64 (x+4)² (x-3) (x-4) = 0

5 0
3 years ago
Find the derivative of 3e^y+x=y
Sindrei [870]

You have the following function:

y=3e^y+x

Derivate implictly the previous expression, as follow:

y^{\prime}=3e^yy^{\prime}+1

Where you have used that:

(e^y)^{\prime}=e^yy^{\prime}

Then, the implicit derivative of the given expression is:

y^{\prime}=3e^yy^{\prime}+1

Next, solve for y' as follow:

\begin{gathered} y^{\prime}-3e^yy^{\prime}=1 \\ (1-3e^y)y^{\prime}=1 \\ y^{\prime}=\frac{1}{1-3e^y} \end{gathered}

4 0
1 year ago
Solve for x<br><br> explain how to do it pls
Arte-miy333 [17]
X=7

(15x+3)=108
x=7

if you plug 7 in for x

(15(7)+3) it equals 108
7 0
3 years ago
Other questions:
  • Help !! What’s the answer ??
    13·2 answers
  • TRUE OR FALSE: a rectangular equation that is not a function may be a function in the polar coordinate system.
    10·2 answers
  • Which of these strategies would eliminate a variable
    15·2 answers
  • Factor the expression<br> 20k+50<br> I have no clue how to do this
    6·1 answer
  • D) Later, Jerry purchased items for his garden in his new yard.
    5·1 answer
  • Emily is buying new cold-weather gear for her family. She pays $100 for 5 pairs of waterproof gloves that each cost the same amo
    6·2 answers
  • Can someone help me with this please i’ll give brainliest and it’s due in a half hour
    11·1 answer
  • What is the solution to this system of equations? Show your work. 46 points
    15·2 answers
  • Help me please will mark brainliest
    7·1 answer
  • Every seventh-grade student at Martin Middle School takes one world language class.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!