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
Kryger [21]
2 years ago
12

The expression 2.5a+2b gives the cost (in dollars) for a DVDs and b CDs at a moving sale. a. The cost for 1 DVD is $ and the cos

t for 1 CD is $ . b. The total cost for 4 DVDs and 4 CDs is $ . Question 2 c. Is $20 enough to buy 6 DVDs and 3 CDs?
Mathematics
1 answer:
Mekhanik [1.2K]2 years ago
5 0

Answer/Step-by-step Explanation:

Given:

a = no. of DVDs

b = no. of CDs

Total cost ($) for DVDs and CDs = 2.5a + 2b

a. The cost for 1 DVD = 2.5(a) = 2.5(1) = $2.5

The cost for 1 CD = 2(b) = 2(1) = $2

b. Total cost for 4 DVDs and 4 CDs:

Substitute a = 4, and b = 4 into the equation.

2.5(4) + 2(4)

10 + 8 = 18

Total cost for 4 DVDs and 4 CDs = $18

c. To find out if $20 would be enough to buy 6 DVDs and 3 CDs, substitute a = 6, and b = 3 into the equation. Solve for the total cost to see if it equals $20 or is less than $20. If it's greater than $20, then it won't be enough.

2.5(6) + 2(3)

15 + 6 = 21

6 DVDs and 3 CDs cost more than $20, therefore, $20 is not enough.

You might be interested in
Ribbon is sold at 3 yards for $6.33. Jackie bought 24 yards of ribbon for a project. How much did she pay?
sergey [27]

151.92

selling the twenty four yards at six dollars and thirty three cents 24 x 6.33 =

8 0
3 years ago
Find the area of triangle ABC (I’ll give you the branliest answer if correct) :)
Dmitriy789 [7]

I can't see pictures T^T.

To find the are of a triangle, you multiply the dimensions as you would a rectangle, but divide the product by 2.

Example:

The dimensions of triangle B are 4 and 9.

4x9=36

Now divide.

36/2=18

So the area of triangle B is 18.

---

hope it helps

5 0
2 years ago
A silo is shaped like a cylinder with a cone on top. The radii of the bases of the cylinder and cone are both equal to 8 feet. T
dangina [55]
Answer: 6702.1

Explanation:
Volume of cylinder = πr^2h
= π(8^2)25
= 1600 π

Volume of cone = πr^2(h/3)
= π(8^2)(25/3)
= π (64)(25/3)
= (1600 π)/3

Add these two numbers
= 1600 π + (1600 π)/3
= (4800 π+ 1600 π)/3
= 6400 π/ 3
=6702.06≈6702.1
7 0
3 years ago
Read 2 more answers
770,070 in expanded form
Shalnov [3]
700,000 + 70,000 + 70


is your answer

hope this helps :D
4 0
3 years ago
Read 2 more answers
The school talent show is 92 minutes long. Acts in the talent show are each about 4 minutes long. How many acts should there be?
valentina_108 [34]

Answer:

23 acts

Step-by-step explanation:

This is a division problem.

92/4 = 23

Answer: 23 acts

5 0
3 years ago
Other questions:
  • If Luis earns a base salary of $150.00 every week with an additional 14 % commission on everything he sells .Luis sold $6050.00
    8·1 answer
  • Which polynomial, when added to the polynomial 5x^2-3x-9 is equivalent to: 18
    7·1 answer
  • Been 3 hours with no answer.
    15·1 answer
  • For the function f(x) = 9-xcalculate the following function values:<br> f(1) =<br> f(2)=
    12·1 answer
  • What is the product of the following expression? 2x(x^2+x-5)
    12·1 answer
  • What can you divide 1,063 by to get to 10?
    6·1 answer
  • Helppppppppppppppppppppppppppppp
    15·2 answers
  • Bridget has swimming lessons every fifth day and diving lessons every third day. If she had a swimming lesson and a diving lesso
    11·1 answer
  • TALK TIME: <br> 1/4 hour : $0.75 <br> What is the unit rate in dollars per hour for Talk time ?
    9·2 answers
  • Are these triangle obtuse or acute using the pythagorean theorem?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!