1
Add 1111 to both sides
5x\ge 31+115x≥31+11
2
Simplify 31+1131+11 to 4242
5x\ge 425x≥42
3
Divide both sides by 55
x\ge \frac{42}{5}x≥542
Answer:
<u>X=7,-3</u>
Step-by-step explanation:
x^(2)-4x-21=0
(x-7)(x+3)=0
x=7,x=-3
Hi,
To find K you will pick a value from the x and then the corresponding Y value. Then we will plug it into the equation that is given y=Kx
Here:
X=25 Y=160
160=k25
(Divide both sides by 25 to isolate K)
K=6.5
Then plug K value into equation
Y=6.5X
Then if you want to check if that is correct you can pick a different point on the table and plug that into the equation to see if you get the same value.
Check:
X=50
Y=6.5x50
Y=320
If f(-2)=1 and f(1) = 7, then 2 pts on the str. line are (-2,1) and (1,7).
7 - 1
The slope of the line connecting these 2 pts is m = ---------- = 6/3 = 2
1-(-2)
Use the slope-intercept formula. Let the point be (1,7) and the slope be 2:
7 = 2(1) + b; find the y-intercept, b:
7 = 2 + b, so b = 5, and the equation of this line through the 2 given points is then
y = 2x + 5 (answer)