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
VladimirAG [237]
3 years ago
12

You buy 8 books for $44. Paperbacks are $4 and hardbacks are $8. How many of each type can you buy?

Mathematics
2 answers:
Alika [10]3 years ago
6 0
She purchased 5 paperbacks at $4 and 3 hardbacks at $8 for a total of $44.

h = number of hardback books
p = number of paperback books
h + p = 8
so
h = 8-p
.
4*p = price of paperbacks
8*h = price of hardbacks
4*p + 8*h = 44
.
substitute h = 8-p
.
4p + 8(8-p) = 44
4p +64 -8p = 44
-4p = -20
p = 5
h = 8-p
h = 3
.
check to be sure the values are right
4*5 = 20
3*8 = 24
20 +24 = 44
Aleksandr-060686 [28]3 years ago
3 0

Answer:

She purchased 5 paperbacks at $4 and 3 hardbacks at $8 for a total of $44.

Step-by-step explanation:

You might be interested in
How many solutions does the following equation have?
RoseWind [281]

Answer:

There will be No solution for the equation 9x - 4 = - 3x + 5 + 12x. Option B is correct.

Step-by-step explanation:

We need to determine how many solutions the equation 9x - 4 = - 3x + 5 + 12x have.

Solving the equation and finding the solutions

9x - 4 = - 3x + 5 + 12x

Combining like terms, Moving 3x and 12x to left side of equality and changing their signs and moving 4 on right side of equation and changing sign.

9x +3x-12x =  5 + 4

Simplifying

12x-12x =  9\\0=9

Solving the equation we get 0=9 which is false. So, there will be No solution for the equation 9x - 4 = - 3x + 5 + 12x. Option B is correct.

5 0
2 years ago
QUICK HELP!!!!
sasho [114]

Answer:

y =  \frac{3}{4} x -  \frac{3}{2}

Step-by-step explanation:

y =  \frac{3}{4} x - 1→y - y1 = m( x - x1)

y - 6 =  \frac{3}{4} (x - 6)→y - 6 =  \frac{3}{4} x - 6

2(y - 6) = 2( \frac{3}{4} )(x - 6)

2y - 6=  \frac{3}{2}( x - 6)

2y - 6 =  \frac{3}{2} x - 9

- 6 \: from \: both \: sides

2y  =  \frac{3}{2} x - 3

divede \: by \: 2 \: on \: both \: sides

y =  \frac{3}{4} x -  \frac{3}{2}

Hope this helps!

7 0
3 years ago
What does inverse operations mean?
jok3333 [9.3K]

Answer:

A pair of inverse operations is defined as two operations that will be performed on a number or. variable, that always results in the original number or variable. Another way to think of this is. that the two inverse operations “undo” each other.

Step-by-step explanation:

for example addition and subtraction are and divison and multiplication are, because they inverse each other.

8 0
2 years ago
Plss help i beg you!​
Lady bird [3.3K]

Answer:

50

Step-by-step explanation:

you break the number up into pieces that fit each problem

3 0
2 years ago
The answer to the length of x is in mm. please help!
romanna [79]

Answer:

3.69 mm

Step-by-step explanation:

So it's a right triangle so you can use a^2+b^2=c^2

Plugging in what we know the equation becomes:

2.8^2+2.4^2=c^2 (C = x because x is the hypotenuse)

7.84+5.76=c^2

13.6=c^2

The square root of 3.68782 which rounds to 3.69

So x=3.69mm

4 0
3 years ago
Other questions:
  • I need help with both questions.
    12·1 answer
  • I need help fast!! plz
    9·1 answer
  • What's three equivalent ratios to 12/14
    12·2 answers
  • Expand and Simplify<br> 3(p+5)-3(p+2)
    10·1 answer
  • Find m/1 and m/2 and it is 130 percent on the other side just look at the pick I can’t explain it
    5·1 answer
  • You are playing a game by drawing a card from a standard deck and replacing it. If the card is a face card, you win $30. If it i
    13·1 answer
  • Amanda has four boards that are each 64 inches long. She needs to cut each board into multiple pieces that are each 12 4/5
    15·1 answer
  • Which option best shows X ≤ -3
    14·2 answers
  • What is 7,459,82 rounded to the nearest whole number? (Remember : the whole number is in the ONES place)
    5·1 answer
  • Find the coordinates of point z such that the ratio of fz to zd is 5;3
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!