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
Pie
2 years ago
6

Steven needed to mail a holiday envelope to his Aunt Linda. He used $0.02 stamps and $0.10 stamps to mail the gift. If he used 1

5 stamps worth $0.78, how many of each type of stamp did he use?
Mathematics
1 answer:
Ad libitum [116K]2 years ago
7 0

Answer:Steven used 9 $0.02 stamps and 6 $0.10 stamps

Step-by-step explanation:

let number of $0.02 stamp  be =x

let number of $0.10 stamp  be =y

so that the number of stamps used can be expressed as

x+y=15

and the total price of stamps used equaling  $0.78 be expressed as

0.02x + 0.10y =0.78

Solving

x+y=15----1

0.02x + 0.10y =0.78---2

from equation 1 ,  x =15-y, putting the value of x into equation 2

0.02(15-y) + 0.10y =0.78

0.3 -0.02y + 0.10y  = 0.78

0.3 + 0.08y=0.78

0.08y=0.78-0.3

y=0.48/0.08 =6

y =6 stamps

 Putting bthe value of  y =6 into equation 1

x+6=15

x=15-6 =9

Steven used 9 $0.02 stamps and 6 $0.10 stamps

You might be interested in
Write a number that is gratet than 1 in scientific notation explain how you knowit is grater than 1
sweet [91]

2 x 10^2 because 2 x 10^2 is 200 in standard form and 200 is greater than 1.


7 0
3 years ago
Which expression indicates 10 subtracted from 9n?
lana [24]
(B) it would be 9n-10
6 0
3 years ago
Read 2 more answers
Solve x+4=10 A.x=2 B.x=3 C.x=6 D.x=14
labwork [276]

Answer:

C. x = 6

Step-by-step explanation:

6 + 4 = 10

8 0
2 years ago
Someone please help, i honestly don’t get how to find the angles
jeyben [28]
A.) the degrees inside the triangles are 50, 70, and 60. you know because 180-120=60
b.) you know that they are similar triangles because they have the same angle degrees.

im not sure if this is correct but i think it is :)

8 0
3 years ago
Nina is bouncing on a trampoline her fourth bounce is 6ft high each bounce afterwards is two thirds as high as the bounce before
V125BC [204]

Answer:

8/3ft

Step-by-step explanation:

To find how high she would bounce, we need to first understand that her height of each jump would be multiplied by 2/3 given that each bounce afterwards is two thirds as high as the bounce before.

We can then set the equation:

6 x 2/3 x 2/3

=6 x (2/3)^2

=8/3

Therefore the answer is 8/3 ft.

Hope it helps!

8 0
2 years ago
Other questions:
  • Which of the following graphs could represent a cubic function?
    11·2 answers
  • Julius sold five times as many computers as Sam sold last year. In total, they sold 78 computers. How many computers did Julius
    7·1 answer
  • 20 out of 45 students attended the concert 12 out of 25 students attend the concert what is the equivalent rates
    6·1 answer
  • A consumer organization estimates that over a​ 1-year period 20​% of cars will need to be repaired​ once, 9​% will need repairs​
    7·1 answer
  • Refer to the accompanying data​ table, which shows the amounts of nicotine​ (mg per​ cigarette) in​ king-size cigarettes,​ 100-m
    9·2 answers
  • Adele made cupcakes and cookies. The number of cookies she made is five times as many as the number of cupcakes she made.
    11·1 answer
  • Hi, hiw do we do this question?​
    9·1 answer
  • These two triangles are congruent.
    8·2 answers
  • Tell which statement is the best estimate for the division problem 650 ÷ 8.
    14·1 answer
  • What is the product of 6 and 7 square root 128 in simplest radical form
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!