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
iren [92.7K]
3 years ago
7

Tavon has a $50 gift card that loses $2 for each 30-day period it is not used. He also has a $40 gift card that loses $1.50 for

each 30-day period that it is not used. Write and solve an equation for the number of 30-day periods until the value of the gift cards will be equal.
Mathematics
1 answer:
svp [43]3 years ago
6 0

Answer:

20

Step-by-step explanation:

The first equation is 50 - 2x (because you start with $50 and subtract 2 for each 30 day period)

 

The second equation is 40-1.5x

 

Set them equal to each other:  50 - 2x = 40 - 1.5x

Solve for x:

 

50 - 2x = 40 - 1.5 x

    +2x         +2x

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

 

50 = 40 + 0.5 x

-40   -40

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

10 = 0.5 x

20 = x

 

So there will be 20 30-day periods until the cards will be equal in value.

 

Check:  After 20 periods, 50 - 2(20) = $10 left

 

40 - 1.5(20) = also $10 left

You might be interested in
The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. The cost of cultivating corn and wheat (includin
babunello [35]

Answer:

He should plant 100 acres of corn and 400 acres of wheat.

Step-by-step explanation:

This problem can be solved by a siple system of equations.

]x denotes the number of acres of corn

y denotes the number of acres of wheat

Building the system:

The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. This means that:

x + y = 500

The cost of cultivating corn and wheat (including seeds and labor) is $42 and $30 per acre, respectively. Jacob Johnson has $16,200 available for cultivating these crops. This means that:

42x + 30y = 16,200

So, we have the following system

1) x + y = 500

2) 42x + 30y = 16,200

If he wishes to use all the allotted land and his entire budget for cultivating these two crops, how many acres of each crop should he plant?

1) x + y = 500

2) 42x + 30y = 16,200

I am going to write y as a function of x in 1), and replace in 2). So:

x + y = 500 means that y = 500-x

42x + 30y = 16,200

42x + 30(500-x) = 16,200

42x + 15000 - 30x = 16,200

12x = 1,200

x = \frac{1,200}{12}

x = 100

Now, going back to 1:

y = 500 - x = 500 - 100 = 400

He should plant 100 acres of corn and 400 acres of wheat.

5 0
3 years ago
a plant grew 1/8 inches last week 3/8 inch this week how many inches did the plant grow in the last 2 week
Vladimir79 [104]
1/2 inches.................................
4 0
3 years ago
Read 2 more answers
Use the Pythagorean Theorem to find the distance from Emma's house to the library.
AlladinOne [14]

Answer:square root 130

Step-by-step explanation:

4 0
4 years ago
What is longer 48 feet or 18 yards. Show your work
solong [7]
Well, 18 yards is 54 feet.
5 0
3 years ago
Read 2 more answers
How do i find the area of a trapezoid? please make your answer simple yet descriptive...
Vera_Pavlovna [14]
A = a+b/2 x h
Add sides a and b then divide by 2
After that multiply by the h
4 0
4 years ago
Other questions:
  • Three times the smaller of two consecutive odd integers is the same as 116 less than 5 times the larger integer find the integer
    7·1 answer
  • 30-x=(-12) What is the variable?
    8·2 answers
  • X over 2 - x over 3 = 4
    7·1 answer
  • We can treat selections from a sample as independent if the sample size is no more than ______ % of the size of the population.
    10·1 answer
  • Need help dont know how to round <br><br>round this number to the nearest thousand? 0.7966347977​
    6·2 answers
  • In​ randomized, double-blind clinical trials of a new​ vaccine, were randomly divided into two groups. Subjects in group 1 recei
    10·1 answer
  • Please help me please thank you
    6·2 answers
  • Mathematics<br> problem- a7 = −4
    11·1 answer
  • What is the area of a rectangular room that is 9 3/5 meters long and 8 3/4 meters wide
    11·2 answers
  • Which event below is
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!