Answer:
4th option
Step-by-step explanation:
The term that combines with 3x²y , must have variables x²y
The only other term with x²y is 8x²y
It would take five hours for all the bacteria to die. 1000 divided by 5 is 200 so 200×5 = 1000
Answer:
1. y=6x-22
Step-by-step explanation:
point-slope form equation : y=mx+b
1. (3, -4) m=6
Sub the numbers is
y=-4 / x=3 / m = 6
-4=6*3+b
-4=18+b
b=-22
So your equation would be y=6x-22
2. (4, 2) m=-5/3
sub the numbers into the equation
y=2 / x=4 / m= 5/3
2=4*5/3+b
2=20/3+b
b=8 2/3
so the equation would be
y=-5/3x+8 2/3
3. (0,2) m=4/5
sub the numbers into the equation
2=0*4/5+b
b=2
so the equation would be
y=4/5x+2
4. (-2, -7) -3/2
sub the numbers into the equation
-7=-3/2*-2+b
b=-10
so the equation would be
y= 3/2x-10
5. (4,0) 1
sub the numbers into the equation
0=1*4+b
b=-4
so the equation would be
y=x-4
6. (5,-8) -3
sub the numbers into the equation
-8=5*-3+b
-8=-15+b
b=7
so the equation would be
y=-3x+7
7. (-5, 2) 0
sub the numbers into the equation
2=-5*0+b
b=2
so the equation would be
y=2
8. (1, -8) -1/5
sub the numbers in
-8=1*-1/5+b
b= 7 3/5
so the equation would be
y=-1/5x + 7 3/5
9. (-6,1) 2/3
sub the number in
1=2/3*6+b
b=-3
so the equation would be
y=2/3x-3
