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
kodGreya [7K]
3 years ago
15

adam spent 13.10 on supplies for school. book covers cost 1.50 and boxes of mechanical pencils were each 2.80. if he bought seve

n items total, then how many of each did he buy
Mathematics
1 answer:
Flauer [41]3 years ago
7 0
<h3>Answer:</h3>

5 book covers and 2 boxes of pencils

<h3>Step-by-step explanation:</h3>

If all 7 were book covers, the cost would be 10.50. The cost is 2.60 more than that. Each box of mechanical pencils costs 1.30 more than a book cover, so there must be 2.60/1.30 = 2 boxes of mechanical pencils (and 5 book covers).

_____

If you want an equation, let p represent the number of pencil boxes. Then 7-p is the number of book covers.

... 1.50(7-p) +2.80p = 13.10

... 1.30p = 13.10 -10.50 . . . . . subtract 10.50, collect terms

... p = 2.60/1.30 = 2 . . . . pencil boxes

... 7-2 = 5 . . . . . book covers

You might be interested in
What is the surface area of the figure below
Luden [163]

The surface area of the figure will be 88 square feet.

<h3>What is Geometry?</h3>

Geometry deals with the size of geometry, region, and density of the different forms both 2D and 3D.

The surface area can be found by the sum of all the parts of the figure.

Therefore,

Surface area = 8 + 8 + 12 + 12 + 24 + 24

Surface area = 88

The surface area of the figure will be 88 square feet.

More about the geometry link is given below.

brainly.com/question/7558603

#SPJ1

4 0
2 years ago
PLLLLLLLLSSSSSS HELLLLLLPPPPPP MEEEEEE Simplify: 29/4
SCORPION-xisa [38]

Answer:

7 , 1/4

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Answer this, please!! Its urgent
nata0808 [166]

Answer:

Hello dear,

5.102 ×10⁸km

300000000

2.4×10⁵

149600000000m

Hope it will help you

please thank

8 0
3 years ago
Read 2 more answers
Neil started a stamp collection with 12 stamps. Every week , he adds 4 more stamps to the collection. Which function? F represen
svlad2 [7]

Answer:

s=4w+12

Step-by-step explanation:

Let

s -----> the number of stamps

w ----> the number of weeks

we know that

The linear equation that represent this situation is

s=4w+12 ----> equation of the line into slope intercept form

where

the slope m is equal to m=4\ stamps/week

the y-intercept b is equal to b=12\ stamps ---> (the initial value)

7 0
3 years ago
How much money do you save when you buy a $40 video game that is on sale for 25% off?
nexus9112 [7]
I it is think it’s $10
4 0
3 years ago
Read 2 more answers
Other questions:
  • A weight of 15 ounces stretches a spring 10 inches. A weight of 24 ounces stretches the same spring 16 inches. How many inches d
    12·1 answer
  • Please can some1 help me w this ;((( it’s find BC
    6·1 answer
  • The second side of a triangular deck is 5 feet longer than the shortest side and a third side that is 5 feet shorter than twice
    12·1 answer
  • What is the average of the following numbers 66.9,5.6,70.1​
    8·1 answer
  • What is the x value of -2x+3y=3 , x+2y=2?<br><br> -4<br> -3<br> -2<br> 4
    7·2 answers
  • What is an equation of the line that passes through the point (-1,-3)(−1,−3) and is perpendicular to the line x-2y=14x−2y=14?
    8·1 answer
  • Please help! I would really appreciate it!
    6·2 answers
  • Someone said it is D CAN SOMEONE TELL ME THE RIGHT ONE
    6·1 answer
  • 13.) Which of these is a better deal, on a per ounce basis?
    8·1 answer
  • At an elevation of 1221.4 feet, Lake Mead will hold 28,945,000 acre-feet of water. Which number is the best estimate of this amo
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!