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
nadezda [96]
3 years ago
6

one elvis stamp and one liberty stamp cost a total of .63. a sheet of 40 elvis stamps and 20 liberty stamps cost a total of 18.4

0. determine the price of an elvis stamp and a liberty stamp.
Mathematics
1 answer:
gregori [183]3 years ago
6 0
Elvis stamps: 0.29
Liberty stamps: 0.34
You might be interested in
Determine whether each of the following products is rational or irrational.
ankoles [38]

Answer:

-irrational

-rational

-rational

-irrational

__________________________________________________________quick and easy way is to see if the squares are perfect squares, like square root seven is irrational, so the answer is irrational. square root 9 is 3, which is rational, so its rational.

brainliest is appreciated :)

6 0
3 years ago
Suppose you have an experiment where you flip a coin three times. You then count the number of heads. a.) State the random varia
coldgirl [10]

Answer:

The answer to each point is below

Step-by-step explanation:

We will solve point by point:

a)  We have to:

Random variable X = number of heads

Let, H => heads, T => tails

b) We have that the combinations are

TTT, TTH, THT, THH, HTT, HTH, HHT, HHH

Number of Heads (X)  0     1      2     3

Probability (P)             1/8   3/8  3/8   1/8

c) attached the histogram.

d)  We have the following:

Mean = E (X) = 0 * 1/8 + 1 * 3/8 + 2 * 3/8 + 3 * 1/8

m = 1.5

The mean is 1.5

e) E (X ^ 2) = 0 * 1/8 + 12 * 3/8 + 22 * 3/8 + 32 * 1/8 = 3

Variance = E (X ^ 2) - (E (X)) ^ 2

Var = 3 - (1.5) ^ 2

Var = 0.75

The variance is 0.75

f) standard deviation = (Var) ^ (1/2) = (0.75) ^ (1/2) = 0.866

sd = 0.866

the standard deviation is 0.866

g) P (2 or more heads) = 3/8 + 1/8 = 0.5

The probability is 50%

h)  P (two heads) = 3/8 = 0.375

It is likely that out of 8 times of 3 flips, 3 times we can observe two heads out of 3, therefore it is not unusual.

6 0
3 years ago
Cara has 25$ to buy dry pet food and treats for the animal shelter. A pound of dog food cost $2 and treats are $1 apiece. If she
alina1380 [7]
Let x be the number of treats bought
Let y be the pounds of food bought

25= 2y+x

Given that she has buys 9 pounds of dog food:

25= 2(9)+x
25=18 +x
25-18 =x
7=x

With the money she has left over, she can buy 7 treats.

Hope I helped :)
5 0
3 years ago
PLZ HELP! NO FAKE ANSWER PLEASE!!!!!! PLEASE AND THANK YOU MARRY CHRISTMAS!
lilavasa [31]

Answer:

1. m=1/2

2. x=4/7

3. t=4

4. y=5

Step-by-step explanation:

1. 5m+4=7m+6

5m-7m=6-5

2m=1

m=1/2

2. -5x+3=2x-1

-5x-2x=-1-3

-7x=-4

x= -4/-7= 4/7

3. 5t-3=3t+5

5t-3t=5+3

2t=8

t=8/2= 4

4. 53y-55= 42y

53y-42y=55

11y=55

y=55/11=5

hope it helps!

8 0
3 years ago
Read 2 more answers
Please need help on this question 20 points
notsponge [240]

Answer:C

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • the booster club raised 102$ in their car wash .they want to buy 18$ soccer balls for the soccer team write and solve a inequali
    10·1 answer
  • Which description best describes coplanar figures? A. They are contained in the same plane. B. They are not contained in the sam
    15·1 answer
  • How do you solve -6x+5t=-30
    13·1 answer
  • Solve the following equation. x/8 = .42
    15·2 answers
  • Evaluate the dot product of (7, 5) and (- 5, 4)
    11·1 answer
  • Colin invests £4300 into his bank account.
    10·1 answer
  • HURRY HURRY HELP MEeeeee
    14·1 answer
  • Maria and Jane set up a lemonade stand one summer to earn money for a trip to the beach. They noticed that the hotter the day, t
    8·1 answer
  • Which of the following satisfy x ≥ 4.1? Select all that apply.
    13·1 answer
  • The question is in the picture i uploaded!!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!