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
Arturiano [62]
3 years ago
5

Marcella and Danilo went to a bookstore. Marcella bought 2 notebooks and 3 pens for $14.50. Danilo bought 1 notebook and 2 pens

for $7.50. How much does 1 notebook cost?
Mathematics
1 answer:
o-na [289]3 years ago
4 0

equation 1: 2N+3P=14.50

equation 2: 1N +2P =7.50

multiply equation 2 by 2 so that N is same as equation 1

1N+2P=7.50 x 2 = 2N+4P = 15.00

subtract equation 1 from new equation

2N+4P = 15.00 - 2N+3P=14.50 = 1P = 0.50

 so 1 pen cost 0.50

 replace 0.50 for P in equation 1:

2N+3P=14.50 =

2N +3(0.50) = 14.50

2N +1.50 =14.50

2N = 13.00

N=13.00/2 = 6.50

notebook cost 6.50

 check:

2(6.50) + 3(0.50) = 13 +1.50 = 14.50

1(6.50) +2(0.50) =6.50 + 1.00 = 7.50


 both equations work

 Pens cost 0.50 each

 notebooks cost 6.50 each

You might be interested in
The owners added a second floor to the house. The second floor is 50 feet long and 30 feet wide with ceilings that are 9 feet ta
Brrunno [24]

Answer:

43100

Step-by-step explanation:

A rectangular one-story house covers an area of 3,700 square feet. The ceilings are 8 feet high. The owners add a second floor to the house. The second floor is 50 feet long and 30 feet wide with ceilings that are 9 feet high. What is the total volume of the interior of the house?

Volume = length x width x height

or volume =  area x height

Volume of the one- storey  = 3700 x 8 = 29600 square feet

Volume of the second floor = 50 x 30 x 9 = 13500 square feet

volume of interior = 29600 + 13500 = 43100 square feet

7 0
3 years ago
What is the answer to the problem 5+(-8)+(-5)
Svetradugi [14.3K]
The correct answer is -8
8 0
4 years ago
Complete the table of values for the function f(x)=-x^2+8x-2
Kipish [7]

Answer:

f(1) = 7

f(2) = 18

f(3) = 31

f(4) = 46

f(5) = 63

f(6) = 82

f(7) = 103

f(8) = 126

f(9) = 151

f(10) = 178

Step-by-step explanation:

f(1) = (-1)^2+8(1)-2 = 7

Continue plugging in values...

6 0
3 years ago
HI! I HAVE A TEST ON MONDAY AND IM TRYING TO STUDY, IM KINDA STUCK ON HOW TO DO THIS PROBLEM..
sergij07 [2.7K]

Answer: See below

Step-by-step explanation:

number of yellow pieces/number of blue pieces

= 14/24

= 7/12 --> 7 to 12 --> 7:12

The ratio that represents the number of yellow pieces to the total number of pieces is part-to-whole

number of yellow pieces/total number of pieces

= 14/100

= 7/50 --> 7 to 50 --> 7:50

The ratio that represents the number of blue pieces to the total number of pieces is part-to-whole

= 24/100

= 6/25 --> 6 to 25 --> 6:25

8 0
2 years ago
7. Sharona's age is at most 3 more than twice Kayla's age. If Sharona is 35 years old, which
oee [108]

Answer:

a or b

since 35-3= 32/2 16

Kayla is 16 years old

6 0
3 years ago
Other questions:
  • Simplify this equation ASAP please
    11·1 answer
  • What is the quotient of 43,482 ÷ 12?
    10·1 answer
  • Which factors can be multiplied together to make the trinomial 5x2 + 8x – 4? Check all that apply.
    7·2 answers
  • A box of 80 coins, consisting of only nickels and dimes, is worth 7 dollars and 80 cents. Find the number of nickels.
    7·1 answer
  • Let y=21 and x=1.5 if y varies directly with x find y when x=9
    8·2 answers
  • PLEASE HELP<br><br> Solve.<br><br> m^-5 = 1/32<br><br> m = ________ ?
    15·1 answer
  • The following graph shows the cost c, in dollars, of p pounds of strawberries at a local grocery store.
    7·1 answer
  • In Ms. Henrick's class, there are 10 boys and 12 girls. What is the ratio of boys to girls? Express your answer as a fraction in
    13·2 answers
  • Violet has a points card for a movie theater.
    8·1 answer
  • If l=5 and b=3 ,find the values of L*B
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!