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3 years ago

What is the mean for the set of data

Mathematics

1 answer:

AnnyKZ [126]3 years ago

7 0

Answer:

B) 25

Step-by-step explanation:

First, you add up all the numbers. Then, you divide it by 9 which is the total amount of numbers there are.

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If a car with an average speed of 40 miles per hour drives for 45 minutes how far will it have gone

REY [17]

Answer: $30\ miles$

Step-by-step explanation:

The average speed of the car is 40 miles per hour:

$V=40\ \frac{mi}{h}$

The car drives for 45 minutes:

$t=45\ min$

Since 1 hours has 60 minutes, we can convert the time from minutes to hours:

$(45\ min)(\frac{1\ h}{60\ min})=0.75\ h$

Knowing these values, we can use the following formula for calculate the distace "d":

$d=V*t$

Therefore, substituting values into the formula, we get:

$d=(40\ \frac{mi}{h})(0.75\ h)\\\\d=30\ mi$

3 0

3 years ago

Find the value of k by<br>quardractic equation two real and equal roots<br>5x - 2kx +20=0

kotegsom [21]

Answer:

k = +10 or -10

Step-by-step explanation:

It's given in the question that the roots of the eqn. are real and equal. So , the discriminant of the eqn. should be equal to 0.

$= > {b}^{2} - 4ac = 0$

$= > {( - 2k)}^{2} - 4 \times 5 \times 20 = 0$

$= > 4 {k}^{2} - 400 = 0$

$= > 4( {k}^{2} - 100) = 0$

$= > {k}^{2} - 100 = 0$

$= > k = \sqrt{100} = + 10 \: or \: - 10$

3 0

2 years ago

Read 2 more answers

What is the simplified form of the following expression? 4x2|y3z| 4x4y8

bija089 [108]

Answer:

16x⁶y⁸|y³z|.........

3 0

3 years ago

Read 2 more answers

Type an equation for the line shown on the graph<br><br> (-2,-3) (2,3)

scoray [572]

Answer:

y = 1.5x

Step-by-step explanation:

5 0

2 years ago

Am I correct?? HELP!!

lesya [120]

8 would be B.
The ratio is 1:5, so the answer has to be a division of 5.
15*5 does not equal 90, but 18 does.

9 is correct.

7 0

3 years ago