Answer:
Step-by-step explanation:
The product of..2x + y and 5x - y +3....
= (2x + y) × (5x - y + 3)
= (10x² -2xy + 6x + 5xy -y² + 3y)
= ( 10x²- y² +3xy +6x + 3y)
Hope you like it...
Answer:
Increase
Step-by-step explanation:
The researcher records the following estimates: 450, 426, 310, 500, and 220.
The mean of these estimates is derived below.
Mean = (450+426+310+500+220)/5
=1906/5=381.2
If the researcher removes the estimate of 220.
The mean of the other numbers will be:
Mean =(450+426+310+500)/4
=1686/4=421.5
By comparison of the two mean, we can see that the value of the mean will increase.
The both can be divides by 3
Answer:9x-9=7 or 9x-9=-7
Step-by-step explanation:
An absolute value is the distance from zero, therefore the answer can not be negative. In this case, 9x-9=7 and 9x-9=-7 both work, because 7 and -7 are the same distance from zero.
Answer:
A' = (3, 6)
B' = (9, -3)
C' = (-12, -6)
Step-by-step explanation:
you can mulitply both the x and y coordinates of each point by the scale factor (3)
point (1, 2) becomes point (3, 6)
(3, -1) becomes (9, -3)
(-4, -2) becomes (-12, -6)
hope this helps!! have a lovely day :)
<em>{this is why whoever wrote the problem gave that hint--you can follow through on that logic, but just remember that it has to be a scaled version of the original figure--so the ratios between points (and x/y values) must be consistent}</em>