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Sidana [21]
3 years ago
14

Use the formula d=rt to find the average speed of a car if the car traveled 320 miles in 8 hours.

Mathematics
2 answers:
motikmotik3 years ago
7 0

Answer:

c.......................

igor_vitrenko [27]3 years ago
6 0
Distance = rate times time, so rate = distance divided by time. 320 miles = distance and 8 hours = time, so the rate of speed is 320/80, which is forty miles per hour. the answer you're looking for is c!
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Calculate the area of each figure.
guapka [62]

Answer:

230cm^{2}

Step-by-step explanation:

17*10=170

12*10*1/2=60

170+60=230

6 0
3 years ago
How would I know what lines are intersecting, perpendicular, parallel and coinciding based off an equation given? Like in the pi
NikAS [45]
If lines are paralel, then they have the same slope
if the lines are pependicuilar, the slopes mutiply to -1

so

y=mx+b
m=slope

and
ax+by=c
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given
y=2/3x-2
slope is 2/3

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8 0
3 years ago
Which expression represents the phrase, "half the sum of 10 and a number"? 12x+10
Nonamiya [84]
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4 0
3 years ago
The ordered pairs
Paul [167]

Answer:

Step-by-step explanation:

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Equation of line: y = x+3

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5 0
2 years ago
The standard deviation of a sample taken from population A is 17.6 for a sample of 25.
lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation \sigma_A is

\sigma_A = 17.6

The sample size n_A is:

n_A = 25.

For the sample of population B, the standard deviation \sigma_B is

\sigma_B = 21.2

The sample size n_B is:

n_B = 30.

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\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}

Finally

\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23

7 0
3 years ago
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