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
alexgriva [62]
3 years ago
8

NEED HELP NOW I have 31 stamps total. I have 4 more 1-cent stamps than 8-cent stamps and twice as many one cent stamps as 12 cen

t stamps. If my stamps are worth $1.78 altogether how many one cent stamps do I have?
Mathematics
1 answer:
krek1111 [17]3 years ago
8 0

x = number of 1-cent stamps

y = number of 8-cent stamps

z = number of 12-cent stamps

We have 31 stamps all together, so x+y+z = 31.

"I have 4 more 1-cent stamps than 8-cent stamps" means we have the equation x = y+8. Whatever y is, add 8 to it to get x. Solve for y to get y = x-8.

You also have "twice as many one cent stamps as 12 cent stamps", so x = 2z. Solving for z gets you z = 0.5x

-------------

x+y+z = 31

x+x-8+z = 31 ... y replaced with x-8

x+x-8+0.5x = 31 ... plug in z = 0.5x

2.5x-8 = 31

2.5x = 31+8

2.5x = 39

x = 39/2.5

x = 15.6

Your teacher made a typo somewhere because we should get a positive whole number result for x (since x is a count of how many 1-cent stamps we have).

You might be interested in
Put the following equation of a line into slope-intercept form, simplifying all
valentina_108 [34]
3(4y−3x+12)=0 the answer (Factor)
7 0
2 years ago
In 1989, Dutch ice skater Dries van Wijhe skated 200 km at an average speed of 35.27 km/h. How long was he skating?
Flura [38]

Speed is determined as distance travelled over time. In the problem, given is the speed and distance. Time, we will be distance over speed. Substitute the given to the formula

t=d/s

t = 200 km / 35.27 km/h

t = 5.67 hours

8 0
3 years ago
Which method could be used to factor 4x^2-50?
Natali [406]
Factor out the gcf
factor by grouping
perfect square trinomial
or
difference of squares
?
5 0
3 years ago
One package of tile will cover 3 square feet.How many packages will shee need 8,13,15,39
IrinaVladis [17]

Hey there! :)

Answer:

13 packages.

Step-by-step explanation:

Begin by finding the total area of this composite figure. Separate the figure into separate rectangles. Use the formula A = l × w to calculate the area of each:

Smaller rectangle:

Subtract 7 from 9 to find the width:

9 -7 = 2. Therefore:

2 × 2 = 4 ft².

Larger rectangle:

7 × 5 = 35 ft².

Add up the two areas to find the area of the entire figure:

4 + 35 = 39 ft².

If each package of tile covers 3 ft², simply divide to find the package of tiles needed:

39 / 3 = 13 packages.

4 0
3 years ago
Jonathan wants to the new baseball game for his game console. The game costs $45.99. If sales tax is 6%, write an equation to fi
gladu [14]
0.0765 i think is the answer
7 0
3 years ago
Other questions:
  • Tara has 4 4/5 feet of rope. Part A: How many 2/5 foot pieces can Tara cut from the feet of rope? Show your work.
    15·2 answers
  • What are the roots or the equation x^2+6x-9=0
    8·1 answer
  • What is the x-coordinate of the solution to the system of equations 3x-2y=-30 6x+3y=3
    9·1 answer
  • Two fractions have the same denominator. Which is greater fraction: the fraction with the greater
    9·2 answers
  • Solve for x.<br><br> |2x - 8| - 2 = 16 - 2x
    10·2 answers
  • If a probability distribution is 5/12, 1/12, 1/4, x, what is the value of x?
    10·1 answer
  • Please help due today
    9·2 answers
  • Can someone please help me what’s the answer
    12·2 answers
  • Submit
    7·1 answer
  • Use the distributive property to rewrite this expression.<br> 4(y + 6)
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!