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
Alina [70]
2 years ago
9

Evelyn answered 42 questions correctly on her multiple choice history final and earned a grade of 21%. How many total questions

were on the final exam?
Mathematics
1 answer:
Thepotemich [5.8K]2 years ago
4 0

Answer:

200 questions

Step-by-step explanation:

Given data

Let the total questions be x

so that

21% of x= 42 questions

let us solve for x

21/100*x= 42

0.21*x= 42

0.21x= 42

Divide both sides by 0.21

x= 42/0.21

x= 200 questions

Hence the questions are 200 questions

You might be interested in
Find BC if B(8,-7) and C1-4,-2).
Alika [10]

Using distance formula :

  • \sqrt{(x_2 - x_1) {}^{2}  + (y_2 - y_1) {}^{2} }

  • \sqrt{(8 - ( - 4)) {}^{2}  + ( - 7 - ( - 2)) {}^{2} }

  • \sqrt{(12) {}^{2} + ( - 5) {}^{2}  }

  • \sqrt{144 + 25}

  • \sqrt{169}

  • 13 \:  \: units
4 0
2 years ago
What fraction must be subtracted from the sum of 1/4 and 1/6 to have an average of 1/12 of all the two fractions
DanielleElmas [232]

Answer:

so 1/3 must be subtracted from the sum of 1/4 and 1/6 to have an average of 1/12 of all the two fractions.

Step-by-step explanation:

let the fraction be x

(1/4 + 1/6)-x =  1/12

or, 10/24 - x = 1/12

or, 5/12-1/12 = x

so, x = 4/12 = 1/3

8 0
2 years ago
(2x - 3y)(4x - y)<br> simplify for me
Galina-37 [17]
8x^2-14xy+3y^2 is the answer
5 0
2 years ago
(√3-√5)(√5+√3)/7-2√5
strojnjashka [21]

Answer:

= - 14 - 4√5/ 29

Step-by-step explanation:

(√3-√5)(√5+√3)/7-2√5

= √15 + 3 - 5 - √15/7 - 2√5

= - 2/7 - 2√5

= - 2/7 - 2√5 x 7 + 2√5/7 + 2√5

= - 14 - 4√5/49 + 14√5 - 14√5 - 20

= - 14 - 4√5/ 29

7 0
3 years ago
15. Ankita bought 20 copy for Rs. 25 each. She got profit of Rs.200 while selling it. Find selling price of the copies.​
allochka39001 [22]

Answer:

S.P = 225

Explanation:

Cost Price = 20 copies for Rs. 25

Selling price = 20 copies for ?

Profit = Rs. 200

Profit = S.P -C.P

Profit + C.P = S.P

200 + 25 = S.P

225 = S.P

6 0
2 years ago
Other questions:
  • Answer FASSSSSSSSSTTTTTTTTTTTTTTT
    12·2 answers
  • The demand function for a type of portable radio is given by the model d=85−6x2, where d is measured in dollars and x is measure
    12·1 answer
  • Carlos plotted the points (-4,-4) and (0, 3) and connected them with a line, as shown below.
    8·1 answer
  • Sales tax is 6% and you spend $42. How much money will you spend on tax?
    9·2 answers
  • Please help need answer
    15·2 answers
  • Eric buys a coffee table price d at $100. If the sales taxis 5%, what wil lbe the total cost including tax?
    15·2 answers
  • Please tell me I put 100 points for this
    8·2 answers
  • If n is parallel to m, which of the following statements are true? Select all that apply.
    6·1 answer
  • Find the probability and its complement.
    5·1 answer
  • Need help on this problem
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!