Y=5x+6 will pass through (1,11) and it is parallel to y=5x-7
5x can be interpreted as 5/1, which is the rise over run ( rise / run )
for every X value the line will go up by five
Y=Mx+B
If we start at 11 and go down by five we get 6, this means if we have a B value of 6, with a rise/run of 5/1. at the first X value (1, Y), the Y value will be 11. (1,11)
I'm bad at explaining so ask away and ill further elaborate.
Answer:26
Step-by-step explanation:
Y=1.25^x-2/5-10
Take log of both sides
So Y+10=1.25^x-2/5
So log to base 10 of the two sides of the equation is
Log(Y+10)=X-2/5log1.25.
To make X the subject, divide both sides by log1.25.
Log(Y+10)/log1.25=X-2/5.
Recall that Y was given to be 115
It becomes log(115 +10)/Log1.25=x-0.4
21.64=x-0.4
X=25.6
Answer:
a) 30 000 000
b) -100 000 000
c) -160 000 000
d) 27 500 000
Step-by-step explanation:
You want to know how many bacteria are killed every 6 hours which is 1/10 so 50 000 000:10= 5 000 000 every 6 hours.
a) how many times does 6 hours fit in 1 day) 24÷6=4 so 4×5 000 000= 20 000 000 so then you subtract that from 50 000 000 because you want to know what remains which means 30 000 000 bacteria remain.
b) we already calculated 1 day so 30 000 000×5=150 000 000. Then you subtract that from the 50 000 000. 50 000 000- 150 000 000= -100 000 000
c) 1 day× 7= 30 000 000×7= 210 000 000- 50 000 000= -160 000 000
d) 5 000 000÷2= 2 500 000= 30 000 000- 2 500 000= 27 500 000 6 hours divided by 2 equals 3 hours so you also divide the bacteria by 2.