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Mathematics

1 answer:

SashulF [63]3 years ago

6 0

Answer:

Step-by-step explanation:

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A table has 4 equal edges, one side is 4 cm what is the perimeter

nasty-shy [4]

Answer:

well if each edge is equal in that mean each side equal in length so each side is 4cm

Step-by-step explanation:

perimeter= all sides added together

4+4+4+4

=16cm

hope this helped

6 0

3 years ago

Read 2 more answers

The sum of the speed of two trains is 722.7 miles per hour. If the speed of the first train is 3.3 mph faster than the second tr

stellarik [79]

$x-speed\ of\ first\ train\\x-3.3-speed\ of\ second\ train\\\\x+x-3.3=722.7\\x+x=722.7+3.3\\2x=726\\x=363\\\\x-3.3=363-3.3=359.7\\\\Speed\ of\ first\ train\ is\ 363 mph,\ speed\ of\ second\ train\ is\ 359.7.$

7 0

3 years ago

Plz show work <br> 3(10-x)=21

Contact [7]

Answer:

x = 3

Step-by-step explanation:

3(10-x)=21

30-3x=21

-30 -30

-3x=-9

x=3

5 0

3 years ago

Read 2 more answers

Kira reasoned that 6 1/4 - 2 3/4 = 4 2/4 because the difference between 6 and 2 is 4 and the difference between 1/4 and 3/4 is 2

xeze [42]

<span>Yes, she is reasoning correct, because:

6 1/4 and 2 3/4 are mixed fractions and you can substract them as it shown below:

1. You must substract the fractional parts (</span>which are: 1/4 and 3/4) of the mixed fractions. You can notice that the have the same denominator "4", so you only need write this denominaro and substract the numerators:

= (1-3)/4=-2/4

When you simplify the result, you obtain:

=-1/2

Now, you must sum the integer parts:

6-2=4

Finally, you obtain:

4 -1/2

4 0

3 years ago

The J.O. Supplies Company buys calculators from a non-US supplier. The probability of a defective calculator is 10 percent. If 3

RSB [31]

Answer:

There is a 24.3% probability that one of the calculators will be defective.

Step-by-step explanation:

For each calculator, there are only two possible outcomes. Either it is defective, or it is not. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$