Answer:
Step-by-step explanation:
c.
y= 30x² +44x +16
factor
y= 2 (15x² +22x +8)
find zeros
15x²+22x+8=0
ax²+bx+c=0
x= (-b±√(b²-4ac))/2a
x= -22±√484-480/30 = -22±2/30 = -11±1/15
there are 2 zeros x= -10/15 ; x= -12/15
d.
y= 10x² +60x +80
factor
y= 10(x²+6x+8) = 10( x+2)(x+4)
finding zeros
x+2 =0 so x= -2
x+4 =0 so x= -4
there are 2 zeros x= -2; x= -4
Find the slope soooo its (y2-y1/x2-x1)= -4/4 so -1 is slope
equation is y=-x+4
Answer:
33.8%
Step-by-step explanation:
i had this question and got it right
Answer:
Step-by-step explanation:
3.242424.....
This number can be written as 3 + 0.242424....
We convert the decimal part into fraction
Let x= 0.242424......
Multiply both sides by 100
100x = 24.2424....
x= 0.2424.....
------------------------------------- (subtract it)
99x = 24
Divide both sides by 99
So x= 24/ 99
simplify the fraction
3.242424... can be written as 3 + 0.242424....
Replace the fraction for decimal
So final answer is
Answer:
Step-by-step explanation:
Le the numbers be x and y
<u>Then we have equations:</u>
<u>As per the first equation:</u>
<u>Substitute in the second equation</u>
- 5x - 2(32 - x) = 195
- 5x + 2x - 64 = 195
- 7x = 195 + 64
- 7x = 259
- x = 259/7
- x = 37
<u>Then finding the value of y</u>
