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
aleksklad [387]
4 years ago
13

Evelyn bought some books at the local bookstore. Her total bill was $31.50, which included 5% tax. How much did the books cost b

efore tax?
Mathematics
1 answer:
disa [49]4 years ago
5 0

The books cost $29.925 (or $29.93 rounded). Tax was $1.58

You might be interested in
Which is closest to the total surface area of a cylinder with a radius of 5 inches and a height that is equal to its diameter?
Pie
For this case, the surface area of the cylinder is given by:
 A = 2 * pi * r * h + 2 * pi * r ^ 2
 Where.
 r: cylinder radius
 h: cylinder height
 Substituting values we have:
 A = 2 * 3.14 * 5 * (2 * 5) + 2 * 3.14 * 5 ^ 2
 A = 471
 Answer:
 
The total surface area of the cylinder is:
 
A = 471
5 0
3 years ago
Read 2 more answers
Olivia and her children went into a grocery store where they sell peaches for $2 each and mangos for $1 each. Olivia has $15 to
attashe74 [19]

Answer:

if x represents the number of peaches purchased and y represents the number of mangos purchased

Step-by-step explanation:

4 0
3 years ago
I buy a shirt for $50. It was marked down 30%. What was the original price?
natta225 [31]

Answer:

70dollers right? im sorry if im wrong i tried :) hope this helpss!

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
How to rationalize the denominator?​
VMariaS [17]

Step-by-step explanation:

So, in order to rationalize the denominator, we need to get rid of all radicals that are in the denominator.

Step 1: Multiply numerator and denominator by a radical that will get rid of the radical in the denominator. ...

Step 2: Make sure all radicals are simplified. ...

Step 3: Simplify the fraction if needed.

3 0
3 years ago
slader Suppose that 8% of all bicycle racers use steroids, that a bicyclist who uses steroids tests positive for steroids 96% of
d1i1m1o1n [39]

Answer:

P = 0.4812

Step-by-step explanation:

First, we need to use here two expressions and then do the calculations.

The first one is the conditional probability which is:

P(B|A) = P(A∩B)/P(A)   (1)

The second expression to use has relation with the Bayes's theorem which is the following:

P(D|C) = P(C|D)*P(D) / P(C|D)*P(D) + P(C|d)*P(d)   (2)

Now, the expression (2) is the one that we will use to calculate the probability of a selected random bicyclist who tests positive for steroids.

So, in this case, we will call C for positive and D that is using steroids and d is the opposite of d, which means do not use steroids.

Then, the probabilities are the following:

P(D) = 8% or 0.08

P(C|D) = 96% or 0.96

P(C|d) = 9% or 0.09

P(d) = 1 - 0.08 = 0.92

With these data, let's replace in expression 2

P(D|C) = 0.96 * 0.08 /0.96 * 0.08 + 0.09*0.92

P(D|C) = 0.0768 / 0.1596

P(D|C) = 0.4812 or 48.12%

8 0
3 years ago
Other questions:
  • Which of the following functions has a nonlinear graph?
    8·1 answer
  • √5/49+√20/49−2√45/49
    10·1 answer
  • An ice cream cone has a diameter of 7 cm and a height of 13 cm. How many milliliters of melted ice cream can it hold? (1 cm3 hol
    11·1 answer
  • In a standard deck of cards there are four suits: spades, clubs, hearts, and diamonds. Each suit has one each of 13 cards: ace,
    14·2 answers
  • I need help on my math
    11·1 answer
  • Solve for x in the equation? <br><br> a/(2x-c) = -1
    11·2 answers
  • The sum of the three numbers in 2003,two of the numbers are 814 and 519 what is the third number​
    6·2 answers
  • Identifying Rigid Transformations
    8·2 answers
  • Calculate your age in hours to the nearest hour.
    14·1 answer
  • Solve the equation.<br><br> −10=−b4
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!