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
Mashcka [7]
3 years ago
15

The cost of 3 notebooks and 2 pencils is $5.10. At the same prices, the cost of 2 notebooks and 3 pencils is $4.65. What is the

total cost of a 1 notebook and 1 pencil ?

Mathematics
1 answer:
Pepsi [2]3 years ago
4 0

Answer:

$1.95

Step-by-step explanation:

notebook = n

pencil = p

3n + 2p = 5.10

2n + 3p = 4.65

multiply top equation by 2 and bottom by 3

6n + 4p = 10.20

6n +9p = 13.95

subtract bottom equation from the top equation

-5p = -3.75

divide by 5, negatives cancel out

p  = 0.75

sub p into either equation, I chose the original top equation

3n + 2(0.75) = 5.10

3n + 1.50 = 5.10

subtract 1.50 from both sides

3n = 3.60

divide both sides by 3

n = 1.20

p = 0.75

n + p = 1.95 (the fourth option)

You might be interested in
Need to know how to graph this example y= -2x + 25. I know that y=mx+b. Just confused on how to get what they call plug in. Can
Artist 52 [7]
Here's an example
Y=5x + 10
if x is equal to 5 you would make it
Y=5(5)+10.
basically, just replace the x with what it's equal to.
7 0
3 years ago
Please right answer for 25 pts and a mark. A store is having a sale on chocolate chips and walnuts. For 3 pounds of chocolate ch
Alexxandr [17]

Answer:

Chocolate Chips are 1.50 per pound and Walnuts are 3.25 per pound.

3 0
3 years ago
I NEED HELP PLEASE HELP ME
Aloiza [94]
Answer:
294.14cm^2

Explanation:

First find the area of the whole piece of paper:
32*14=448

Then find the area of the two semicircles, semicircle + semicircle = 1 circle:

Area of a circle= (radius squared)(pi):
(7^2)(3.14) = 153.86

Subtract the area of the two semicircles from the whole paper area:
448-153.86 = 294.14


I hope this isn’t too confusing :)


5 0
3 years ago
Which operation is not used in the phrase twice a number decreased by 4, divided by 8
drek231 [11]

Answer:

Step-by-step explanation:

twice a number .....multiplication

decreased by 4.....subtraction

divided by 8.....division

addition is missing <====

although, twice a number could also be addition.....but I have never  used it for addition

lets say ur number is 4.......twice the number 4 could be : 2 * 4 or 4 + 4

4 0
3 years ago
Read 2 more answers
PLZZ HELPP WILL GIVE BRAINLIEST Graph the line y=25x+3. Use the line tool and select two points on the line. THIS IS A K12 TEST
Sophie [7]

Step-by-step explanation:

you can use any value either in place of x or y to find the corresponding coordinate but if you want to find the x and y intercept you can desigate x as zero and find the y intercept and vice versa.

so to find x and y intercept

y=25x+3. to find x intercept designate y as zero

0=25x+3

-3=25x

x= -3/25. p( -3/25,0)

y=25x+3 to find y intercept designate x as zero

y=25(0)+3

y=3. p(0,3)

the above y and x intercept indicates the points that the line of equation pass through when drawn graphically.

6 0
3 years ago
Other questions:
  • What is the parallel to (3,3) y=x+5
    11·2 answers
  • Solve 4(t+1) = 6 - 1.<br> (A) 2<br> (B) 1<br> (C) O<br> (D) 1]
    8·2 answers
  • The equation for the circle below is x squared+ y squared= 100. what is the length of the circles radius
    7·1 answer
  • Stu has 2/3 of a circular pizza left over from a party. He takes half of it as a snack and evenly splits up the rest to share wi
    8·1 answer
  • Paula wants to tile her kitchen tht is 15 ft ×14 ft with 1 ft. Square tiles. How many tiles does she need?
    12·1 answer
  • Graph the hyperbola x^2/4 - y^2/1 =1
    6·1 answer
  • I need help with this question..
    9·1 answer
  • Frank rolls a fair dice and flips a fair coin.
    12·1 answer
  • HELP PLEASE (and explain if you can <br><br>what is 5cd when c = 3 and d = 4​
    8·1 answer
  • Help is this the right answer if not can u give me the correct answer
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!