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
FrozenT [24]
3 years ago
14

of 320 consumers polled, some purchase blu-ray movies, some only purchase movies on dvd, and some do both. if 300 people polled

purchase blu-ray discs and 280 purchase dvds and blu-ray discs, how many people only buy dvds? please help a. 300 b. 20 c. 280 d. 40

Mathematics
1 answer:
Helga [31]3 years ago
3 0

Answer:

20 people only buy dvds.

Step-by-step explanation:

There are two groups in this problem. One group of people that buys dvds and one that buys blu rays. The total amount of people who buy blu rays is 300, but there's an intersection between the groups and the size of this is 280 people who actually buy both. In order to find out how many people only buy DVDs we first need to figure out how many only buy blu-rays. That is:

people who only buy blu rays = people who buy blu rays - people who buys blu rays and dvds

people who only buy blu rays = 300 - 280 = 20

We can now calculate the amount of people who only buy dvds and that is:

people who only buy dvds =total amount of people - ( people who only buy blu rays + people who buy both)

people who only buy dvds = 320 - (20 + 280) = 320 - 300 = 20 people

You might be interested in
Sydney applied the steps below to find the product of (3.1)(–1.6).
postnew [5]

 to get the numbers in step 3

multiply -1.6 by 3

then multiply -1.6 by 0.1

 and add them together

answer is D) (–1.6)(3) + (–1.6)(0.1)

7 0
3 years ago
Read 2 more answers
A car braked with a constant deceleration of 64 ft/s2, producing skid marks measuring 50 ft before coming to a stop. How fast wa
vitfil [10]

Answer:

The initial speed of the car was 80 ft/s.

Step-by-step explanation:

The deceleration is the rate at which the car speed decreases. In this case the speed of the car goes all the way down to 0 ft/s and in order to do that it travelled 50 ft.  So we will call the initial speed at which the car started to brake "v_0" and use Torricelli's equation to find it. The equation is given by:

v^2 = (v_0)^2 + 2*a*S

Where v is the final speed, v_0 is the initial speed, a is the rate of acceleration and S is the space travelled. Using the values that the problem gave to us we have:

0^2 = (v_0)^2 - 2*64*50

0 = (v_0)^2 - 6400

(v_0)^2 = 6400

v_0 = sqrt(6400) = 80 ft/s

Notice that in this case "a" was negative, since the car was decelerating instead of accelerating.

The initial speed of the car was 80 ft/s.

4 0
3 years ago
Read 2 more answers
Trisha packs x boxes with 12 bottles in each box. The total number of bottles she packs is 216. Which equation and solution repr
LiRa [457]

Answer:

Number of boxes Trisha pack = 18 boxes

Step-by-step explanation:

Given:

Number of boxes Trisha pack = X

Number of bottles in each box = 12

Total number of bottle = 216

Find:

Number of boxes Trisha pack

Computation:

Total number of bottle = Number of boxes Trisha pack x Number of bottles in each box

216 = X × 12

X = 216 / 12

X = 18

Number of boxes Trisha pack = 18 boxes

4 0
3 years ago
Read 2 more answers
Matt is showing his work in simplifying (6.2 − 1.6) − 4.4 + 7.8. Identify any error in his work or reasoning.
shusha [124]
Start with the parentheses first

4.6 -4.4+7.8 then calculate from left to right
= 0.2+7.8 = 8
6 0
3 years ago
Jeremy wants to buy a new computer, the sales woman says he can make down payments and then pay for the computer in installments
Llana [10]
X=t-yz   and we are asked to solve for y so, subtract t from both sides

x-t=-yz  divide both sides by -z

(x-t)/(-z)=y

y=(x-t)/(-z)  multiply the numerator and denominator by -1

y=(t-x)/z
7 0
3 years ago
Other questions:
  • Manny makes the following purchases at the store:
    5·1 answer
  • Zeolite organized a canned food drive. She worked a total of 12 2/3 hours. She worked 3 1/6 hours each day that she worked. How
    8·1 answer
  • Work and answer for 24/40 equivalent
    15·2 answers
  • Solve the equation<br> 1/x + 1/3x = 4
    6·1 answer
  • What is 6 times 340 = ?
    9·2 answers
  • "On the way to the library, John walks 8 blocks from his house before realizing that he should have stopped at the post office t
    9·2 answers
  • What is the radius and diameter of the following circle?
    8·1 answer
  • If you have 24 months to save $4,220 how much would you have to save each month
    7·1 answer
  • Charlotte borrowed $834 to pay for a weekend trip the interest rate she agreed to pay is 3%. If she takes 2 years to pay back th
    12·1 answer
  • If a=12 and 120% of a is equal to 80% of b then what is a+b
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!