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
Lerok [7]
1 year ago
14

Jackie buys 5 books at $27 each and pays for them with 20 dollar bills. How many $20 bills does she need to pay for all the book

s?​
Mathematics
1 answer:
Reika [66]1 year ago
8 0

Answer:

7

Step-by-step explanation:

5 x 27 = 135

135 ÷ 20 = 6.75

round up to 7

You might be interested in
Find the mass of the triangle with vertices (1; 0; 0), (0; 2; 0), (0; 1; 1) if the density function is given by (x; y; z)
Luda [366]

Answer:

=\frac{17}{3}

Step-by-step explanation:

Density of a function is \rho(x,y)=x^{2} +y^{2}

I have drawn the right angle triangle for visualization

equation for the line passing through (1,0) and (0,4) is

\frac{y}{4} =\frac{x-1}{-1}

y=4-4x

=$$\int_{0}^1\int_{0}^{4-4x} (x^{2}+y^{2})dydx$$

=$\int_{0}^{1}(x^{2}+\frac{y^{3} }{3})dx$  

=$\int_{0}^{1}(x^{2}(4-4x)+\frac{1}{3}(4-4x)^{3} )dx$

=$\int_{0}^{1}(\frac{-76}{3}x^{3} +68x^{2}-64x^{}+\frac{64}{3}  )dx$

==(\frac{-76}{3} \frac{x^{4} }{4})+\frac{68}{3}x^{3}-32x^{2}+\frac{64}{3}x^{})  

=\frac{17}{3}

3 0
3 years ago
A Wooden board is leaning against the house the base of the board is 10 feet from the base of the house and the base of the boar
astra-53 [7]

Answer: 12.20 feet.

Step-by-step explanation:

Observe in the figure attached that a right triangle is formed.

Then, you  need to remember the identity:

cos\alpha=\frac{adjacent}{hypotenuse}

In this case you can identify that:

adjacent=10\\hypotenuse=x

\alpha=35\°

Then, to find the length of the wooden board (x), you need to substitute values and solve for x.

Therefore, you get:

cos(35\°)=\frac{10}{x}\\\\(x)(cos(35\°))=10\\\\x=\frac{10}{cos(35\°)}\\\\x=12.20

The length of the wooden board is: 12.20 feet.

5 0
3 years ago
Two-thirds of a number added to itself is 20. What is the number?
vivado [14]

Answer:

12

Step-by-step explanation:

2/3 x + x = 20

2/3 x + 3/3x = 20

5/3 x = 20   ... times 3/5 both sides

x = 12

check: 2/3 x 12 + 12 = 8 + 12 = 20

8 0
3 years ago
Determine the ordered pair that lies on the unit circle corresponding to startfraction 5 pi over 4 endfraction .
viktelen [127]
(negative square root two)/2, (negative square root two)/2
4 0
3 years ago
The relationship between the number of dollars per month that a company spends on
Alex17521 [72]
C)$10000. Hola chao
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the sum of 1/12 plus 3/8 in a fraction?<br><br> A.1/6<br> B.1/5<br> C.11/48<br> D.11/24
    5·2 answers
  • What is the slope of the line on the graph?<br><br><br><br> Enter your answer in the box.
    12·1 answer
  • Im stuck on this question plz help
    8·2 answers
  • Original price $80 percent of discount 20% sale price ?
    6·1 answer
  • Ashley is preparing for a horse riding competition. She has trained her horse for 5 hours and has completed 165 rounds. At what
    10·1 answer
  • P and q are points on the line 3y - 4x = 12
    15·1 answer
  • Suppose 85% of all students taking a beginning programming course fail to get their first program to run on first submission. Co
    8·1 answer
  • Determine between which two integers the following irrational number lie square root 4 square root 21​
    11·1 answer
  • Help now if you dare!
    12·2 answers
  • Please help me on this , will give brainliest , tyy
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!