2x + 4y = 14
4x + y = 20......multiply by -4
----------------
2x + 4y = 14
-16x - 4y = -80 (result of multiplying by -4)
---------------add
-14x = -66....as u can see, ur y's cancel out
so ur answer is : 1st answer choice <==
** and just so u know, u could have multiplied the 1st equation by -2, and it would have cancelled out ur x's
Answer:
C) They are perpendicular lines.
Step-by-step explanation:
We first need to find the slope of the graph of the lines passing through these points using:
The slope of the line that passes through (−12, 15) and (4, −5) is
The slope of the line going through (−8, −9) and (16, 21) is
The product of the two slopes is
Since
the two lines are perpendicular.
Answer: 1/4
Step-by-step explanation:
In a stack of 24, the 2 mediums are odd and even cards in this question. This means that 1/2 the cards are even and 1/2 are odd. To get a even card once is a 1/2 chance, then to get it again is 1/2 x 1/2 chance or 1/4 chance. This is what I think.
Now, as you can see - these are ordered pairs. So, in order to find possible solutions - we have to plot this inequality on a graph!
So, let's do this. I am using GeoGebra in order to graph this inequality.
Alright, so... Now I'm going to go through, and look at each ordered pair and see if they are covered by the shaded region!
Answer A: False
Answer B: False
Answer C: True
Answer D: True
Answer E: True
Answer F: True
Hopefully, this helps you! =)
Answer:
14.44
Step-by-step explanation:
The formula says
A=p(1+r)^t
A 7800
P 3600
R 0.055
T ?
7800=3600(1+0.055)^t
7800/3600=(1.055)^t
Log(7800/3600)= t × log(1.055)
T=log(7800/3600)/log(1.055)
T= 14.44 years
