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kotegsom [21]
3 years ago
11

Stephanie ran four laps around the school track in 7min and 30 sec how many sec per lap is that

Mathematics
1 answer:
Brums [2.3K]3 years ago
5 0

Answer:

1 minute and 52.5 seconds

Step-by-step explanation:

4 Laps = 7 mins 30 sec , we know that there are 60 seconds in a minute so 30/60 = 0.5 plus the 7 minutes we obtain: 7+0.5=7.5 minutes.

Since we want to find out how many seconds it took to go around once and we know that it took 7.5 minutes to go around 4 times we divide 7.5 minutes by 4 laps and so:


7.5minutes/4laps = 1.875 minutes so 1 minute and 87.5 % of a minute so:


0.875 x 60 = 52.5 seconds so 1 minute and 52.5 seconds


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Leo bought a car for x dollars one year later the value of the car was 0.88x.which exspression is another way to describe the ch
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Well, the car depreciated in value by 12%, so you could say
x-12%, or just
x-0.12.
5 0
3 years ago
(06.02 mc) the equation of line cd is y=3x-3. Write an equation of a line perpendicular to line cd in slope intercept form that
Fynjy0 [20]

Answer:

y = - \frac{1}{3} x + 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = 3x - 3 ← is in slope- intercept form

with slope m = 3

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{3}, hence

y = - \frac{1}{3} x + c ← is the partial equation of the perpendicular line

To find c substitute (3, 1) into the partial equation

1 = - 1 + c ⇒ c = 1 + 1 = 2

y = - \frac{1}{3} x + 2 ← equation of perpendicular line

6 0
3 years ago
Read 2 more answers
Jake is going to call one person from his contacts at random. He has 30 total contacts. 16 of those contacts are people he met a
Archy [21]
Answer: P = 8/15

Explanation:

There are 30 contact in total

And there are 16 contacts are people he met at school

P = 16/30 = 8/15
4 0
3 years ago
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What is 8640 minutes in days
Zolol [24]

Answer:

it is 6 days

Step-by-step explanation:

3 0
3 years ago
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In the model below what is x and how do I solve it​
tiny-mole [99]

Answer:so that’s a interior triangle so the mean your 2 points in the inside and the equation on the outside.

X=6

Step-by-step explanation:

(8x-4)+(3x+17)=(17x-23)

Combined our alike terms on the left side of the equation. So 8x+3x and -4+17.

11x+13=17x-23

Now this is what the equation should look like after combining ur alike terms.

11x+13=17x-23

-11x. -11x.

now u take the lowest x which is 11x and mince that from 17x but u only mince if it’s a positive but is it’s a negative u add it.

13=6x-23 so if u moved the x on the right side u move non variable number to the left but if u moved the x to the left u move the non variable number to the right so in this case the non variable number would be -23 so now u add 23 on both sides.

36=6x and now u just divide the 36 by 6 and remember to always divide by the x

Now the answer is x=6

7 0
3 years ago
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