PLEASE HELP I WILL GIVE BRAINALIST!!!!

Mathematics

1 answer:

Zolol [24]3 years ago

7 0

9514 1404 393

Answer:

y = 2x +5

Step-by-step explanation:

We can use the slope formula to find the slope of AB, which is the same as the slope of the parallel line. Then, we can use the point-slope equation for a line to find the desired equation.

m = (y2 -y1)/(x2 -x1)

m = (-8 -2)/(-1 -4) = -10/-5 = 2

y -y1 = m(x -x1) . . point-slope form of equation for a line

y -5 = 2(x -0) . . . . fill in m=2, (x1, y1) = (0, 5)

y = 2x +5 . . . . . . . rearrange to slope-intercept form

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I WILL GIVE BRAINLIEST IF CORRECT !!!!

rosijanka [135]

Answer:

C. $3.2\times 10^{1}$

Step-by-step explanation:

$d_r$ = Diameter of a red blood cell = $0.0008\ \text{cm}$

$d_w$ = Diameter of a whooping cough virus = $2.5\times 10^{-5}\ \text{cm}$

Ratio of the diameter of the red blood cell to the diameter of the whooping cough virus

$\dfrac{d_r}{d_w}=\dfrac{0.0008}{2.5\times 10^{-5}}=\dfrac{0.0008}{25\times 10^{-6}}=\dfrac{0.0008\times 10^6}{25}\\\Rightarrow \dfrac{d_r}{d_w}=\dfrac{800}{25}\\\Rightarrow \dfrac{d_r}{d_w}=32=3.2\times 10^{1}$