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
vaieri [72.5K]
3 years ago
8

St 2

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0

Answer:

$5.5

Step-by-step explanation:

6 * N (notebook) + 3 * P (pen) = 27

n = 1.5 +P

6 * (1.5 + P) + 3 * P = 27

9 +6p +3p = 27

9p = 18

p (pen): $2

N (notebook): $3.5

combined cost of 1 pen and 1 notebook: $2 + $ 3.5 = $ 5.5

You might be interested in
True or False: A race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds w
vredina [299]

Answer:

False

Step-by-step explanation:

given that a race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds.

Sample size n = 20

since population standard deviation is not known, we can use t critical value for finding out the confidence interval

df=19

t critical = 2.045

Margin of error = 2.045*\frac{s}{\sqrt{n} } \\=2.045*\frac{1.47}{\sqrt{20} } \\=0.6722

conidence interval = Mean±Margin of error

= (4.85-0.6722, 4.85+0.6722)\\= (4.1778, 5.5222)

The given confidence interval is (4.52, 5.18)

Hence the statement is false.

5 0
3 years ago
Evaluate (1/3)(m) - 1 - (1/2)(n) m=21 and n=12
Aneli [31]

Answer:

the answer is 0

Step-by-step explanation:

(1/3)(21)-1-(1/2)(12)

The first thing you do is that you multiply 1/3 times 21/1 which equal 7 then you  multiply 1/2 times 12/1 which that equal 6 then you solve 7-1-6 and you get 6-6 which equal 0 i hope this help you and i hope you have a goood day.

8 0
3 years ago
25 pts plz help!!!!!!!!!!!
alexdok [17]
Which part needs answering ?
3 0
2 years ago
Read 2 more answers
uincy uses the quadratic formula to solve for the values of x in a quadratic equation. He finds the solution, in simplest radica
Verdich [7]

Answer: according to spark notes: There can be 0, 1, or 2 solutions to a quadratic equation, depending on whether the expression inside the square root sign, (b2 - 4ac), is positive, negative, or zero. This expression has a special name: the discriminant.

In this case it is 0, not 2, which was my first and wrong answer





3 0
3 years ago
Read 2 more answers
If there are 52 ounces of cereal in 2 boxes, how man ounces are there in the box?
Firdavs [7]
The answer is 26. 26 ounces per box o cereal.
3 0
3 years ago
Read 2 more answers
Other questions:
  • In the diagram, which angles are vertical angles? Select
    10·2 answers
  • How do you common factor 9y-9?
    5·1 answer
  • Solve each system of equation for 3y+x=3 and -2y+5x=15
    8·1 answer
  • The probability of winning a game is 10%. how many times should you expect to win if you play 80 times? 5 times 10 times 8 times
    15·1 answer
  • 8TH GRADE MATH
    10·1 answer
  • Brad deposited $4,000 into a savings account that earn 4% compound interest. How much interest did he earn after three years?
    11·1 answer
  • I need to know if this H(3,2),J(4,1),K(-2,-4),M(-1,-5) is parallel perpendicular or neither I need to show my work and write my
    10·1 answer
  • Hmmmmmmmmmmmmmmmmmmmmmmmmmmm
    5·1 answer
  • Ap:3, 2, 1....<br>what is its coomon difference ​
    6·1 answer
  • Name_<br> Simplify. Your answer should contain only positive exponents.<br> 1) 4².4²
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!