3 years ago

Solve each system using substitution or elimination. Show all required work. X^2+y^2=40 -x+y=-8

Mathematics

1 answer:

mr_godi [17]3 years ago

4 0

Answer:

steps and answers in the pic..hope u can understand the calculations...

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A car travelled a distance of D =320 kilometers for T =5.0 hours at a constant rate use the formula D =R. T To find the speed (R

motikmotik

The speed of car is 64 kilometer per hour

Solution:

Given that car travelled a distance of D = 320 km for T = 5.0 hours

To find: speed (R) of the car in km per hour

Formula given:

D = R. T

where "D" is the distance

"R" is the speed of car

"T" is the time taken

Substituting the given values in above formula we get,

$320 = R \times 5.0\\\\R = \frac{320}{5}\\\\R = 64$

Thus the speed of car is 64 kilometer per hour

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3 years ago

How do I do this? I’m not very good at geometry.

garri49 [273]

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3 years ago

S = 1 / g t ² π, solve for t

Finger [1]

$s = \frac{1}{g {t}^{2}\pi }$

multiply through by

$g {t}^{2} \pi$

$s \times g {t}^{2} \pi = \frac{1}{g {t}^{2} \pi} \times g {t}^{2} \pi$

$sg {t}^{2} \pi = 1$

dividing through by

sgπ

${t}^{2} = \frac{1}{sg\pi}$

$t = \sqrt{ \frac{1}{sg\pi} }$

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To make coffee for 4 people, Mrs. Smith needs 1 cup of milk. How many cups of milk does she need to make coffee for 10 people?

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Answer:

its D

Step-by-step explanation:

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