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Stella [2.4K]
3 years ago
10

Simplify the expression-3÷(-2/5)​

Mathematics
2 answers:
inessss [21]3 years ago
5 0

Answer:

Step-by-step explanation:

(-3)÷(-2/5)

KFC method

Keep the first number, Flip the second number & Change division to multiplication

(-3)*\frac{-5}{2}=\frac{15}{2}

=7\frac{1}{2}\\

Count the number of negative sign.

If number of negative sign is even, then the result will be a positive number

Here 2 negative sign. So result will be an positive number

BARSIC [14]3 years ago
3 0

Answer:

15/2 or 7.5

Step-by-step explanation:

-3÷ (-2/5)

The reciprocal of -2/5 is -5/2

So we multiply -3 into the reciprocal of the fraction and we can get the same answer

Therefore,

-3÷(-2/5)

= -3x -5/2

= (-5x-3)/2

(Two negatives become a positive)

= 15/2 in fraction form

And 7.5 in decimal form

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If you roll a six-sided die, what is the probability that you will roll a 3?
Lana71 [14]

Answer:

the probability is 1/6, or 16.6%

7 0
3 years ago
What is the probability
gulaghasi [49]

Answer: Last Option

P=0.4125

Step-by-step explanation:

In this case we have a uniform probability. In the graph the horizontal axis represents the possible values of the variable x and the vertical axis represents the probability P(x).

To calculate the probability that x is between 4.71 and 7.4 we calculate the area under the curve.

The horizontal length between 4.71 and 7.4 is:

7.4-4.1 = 3.3.

Then notice that the vertical length in this interval is 0.125.

Then the area of a rectangle is:

A = lw

Where l is the length and w is the width.

In this case we have to:

l = 3.3

w = 0.125

So

P = A = 3.3 * 0.125

P=0.4125

3 0
3 years ago
Pls help quick! I am not sure if i did this right
bogdanovich [222]

Answer: The last option, <u>28</u> minutes

Step-by-step explanation:

    See attached for my work. <em>If you are color blind let me know, I color-coded where I "pulled" numbers from.</em>

    To answer this problem, we can look at the graph. We need to see for how long the black line is above the blue.

7 0
2 years ago
Read 2 more answers
Q : <br> what 1:9 x 6 = ?
kow [346]

Answer:

the answer is \frac{2}{3}

Step-by-step explanation:

hope this helps :)

can I get brainliest plz

4 0
3 years ago
Read 2 more answers
Car A, traveling at a constant 10 m/s, crosses the start line 3 seconds before Car B, who is traveling at a constant 15 m/s. At
Margaret [11]
The distance between Car A and car B,When Car A crosses the start line is:
distance =speed car B* time
distance=(15 m/s)(3 s)=45 m
 
Distance traveled by car A =x,  (when the car B is at the same distance from the start line)
time of car A=t

x=10 m/st  ⇒    x=10t    (1)

Distance traveled by car B=x
time of car B=t-3

x=15(t-3)  (2)

With the equations (1) and (2) we make a system of equations:

x=10t
x=15(t-3)

We solve this system of equations:

10t=15(t-3)
10t=15t-45
-5t=-45
t=-45 / -5
t=9

t-3=9-3=6

x=10 t=10 (9)=90

Answer: The time would be 9 seconds for Car A and 6 seconds for car B and the distance would be 90 meters.
8 0
3 years ago
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