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
Answer:
Quadrants 3 and 4
Step-by-step explanation:
we have
using a graphing tool
The solution is the triangular shaded area between the three dashed lines
see the attached figure
The solution lies in Quadrants 3 and 4
Since the first term is x², you know that each group will begin with x. To find the second part of the groups, you need to find two numbers that add up to 10 and multiply to 25. You can do this by listing all the factors of 25 until you find a set that adds to 10.
25 x 1
5 x 5
-5 x -5
The second terms in your groups will be -5 and -5.
(x - 5) (x - 5) This can be simplified to (x - 5)².
Answer:
-5
Step-by-step explanation:
Following the order of PEMDAS, you will multiply what is in the parentheses, then subtract what is in the parentheses, then finally subtract the whole thing.
(6×3 - 7×2) - (-7×4 + 7×3 + 8×2)
(18 - 14) - (-28 + 21 + 16)
(4) - (9)
-5
y=x^2 - 10x +2
Use the form ax^2 + bx + c to find the values of a, b,and c.
a = 1 ( no number in front of the x^2)
b = 10
c = 2
Vertex form is a(x+d)^2 + e
Solve for d using d= b/2a
d = 10 / 2
d = 5
Find e using e = c - b^2/4a
e = 2 - 10^2/4
e = 2 - 25
e = -23
Vertex = d,e
Vertex = (5, -23)
