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
dangina [55]
2 years ago
14

John and Ariana bought school supplies. John spent $11.00 on 5 notebooks and 7 pens. Ariana spent $7.00 on 4 notebooks and 2 pen

s. What is the cost of 1 notebook and what is the cost of 1 pen?
Mathematics
1 answer:
emmainna [20.7K]2 years ago
5 0

Step-by-step explanation:

set notebooks as x, set pens as y

1. 5x + 7y = 11

2. 4x + 2y = 7

1.  times by 2

10x + 14y = 22

2. times by 7

28x + 14y = 49

2. minus 1.

18x = 27

x = 1.5

sub 1.5 into 2.

4(1.5) +2y = 7

6+2y = 7

2y = 1

y = 0.5

Therefore, x = 1.5, y = 0.5

You might be interested in
Explain the significance of the equation 100x -2y+ 400 = 0 which represents the hourly cost of a car repair.
Cerrena [4.2K]

Answer: The significance is that it is how much you will pay for the total repair which will help you know how much money you will spend.

Step-by-step explanation:

8 0
3 years ago
Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 104 miles in the same time that Dana travels 96 miles. If
Yanka [14]

Answer: Chuck's travel at a rate of 52mph

Step-by-step explanation:

For Chuck's trip:

D=RT

104= (R+4)T

T= 104 / (R+4)

For Dana's trip:

96 = RT

T= 96/R

Set both equation for Chuck's and Dana together

104/(R+4) =96/R

Then we cross multiply

96(R+4) = 104R

96R + 384 = 104R

104R - 96R = 384

8R = 384

To get R, divide both side by 8

8R/8 = 384/8

R= 48mph

This means Dana's speed is 48mph

Chuck's speed will be: 48mph+4mph = 52mph

3 0
3 years ago
Please help me P.S ill give brainiest to correct answer
serious [3.7K]

Answer:

Statistical question involves numbers

Step-by-step explanation:

5 0
3 years ago
In the auditorium there are 7 Red chairs and 43 blue chairs what's the ratio of number of red chairs to the total number of chai
Mandarinka [93]

Answer:

7 to 50

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Determine the slope of the line that passes through the points (5, 2) and (-10, -8).
dsp73
Slope = y2-y1 / x2 - x1

= -8-2 / -10-5
= -10 / -15
= 2/3

A
3 0
2 years ago
Other questions:
  • Mariylnn is going to paint a wall in her bedroom. The wall is 15 feet long and 8 feet tall. The window takes up an area 6 feet l
    5·1 answer
  • WILL GIVE BRAINLEST. How do I do this my notes aren’t making sense
    10·1 answer
  • Can some help me pls<br> And fact
    12·2 answers
  • 3.6 , 11−−√, 15−−√, 3.4, 18−−√ To plot the numbers on a number line, which list is ordered from greatest to least? 11−−√, 3.4, 3
    6·1 answer
  • Is 2√10 a simple radical form ?
    9·1 answer
  • How do you determine whether lines are parallel from their equations WHEN GIVEN SLOPE Y INTERCEPT FORM?
    13·1 answer
  • Use substitution: y= 5 and y = 7x -2*
    7·1 answer
  • In a recent flu epidemic, the number of flu cases increased by 40% each week. There were 3,000 flu cases during the first week o
    8·1 answer
  • Period 5 is gearing up for a class ice cream party. Meghan plans to arrange the party and understands that ice cream cones cost
    9·1 answer
  • Two sides of a right triangle measure 2 units and 4 units.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!