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3 years ago

Using wildcard metacharacters, how can one indicate a number is either 1, 2, 3, or 4?

1 answer:

8 0

Using the current "regular expressions" in use in Java, Perl, and many other applications, this belongs to "character class" using the [ ] notation.
For characters "either" 1,2,3,4, we write
[1234]
or in this particular case,
[1-4]

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3 years ago

ANSWER ASAP!!!!! 10 POINTS + BRAINLIEST!!!!!!!!

SOVA2 [1]

Answer:

4:1 ( i think)

Step-by-step explanation:

We can solve for a and b using substitution

a-b=3

a+b=5

solve and get that a=4 b=1

Which means that it's a 4:1 ratio

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3 years ago

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4 years ago

What is the height of an equilateral triangle if the sides are 10

4vir4ik [10]

Answer:

The height of the equilateral triangle is $5\sqrt{3}\ units$

Step-by-step explanation:

we know that

An equilateral triangle has three congruent sides, and three congruent angles that each measure 60 degrees

To find out the height of an equilateral triangle, apply the Pythagoras Theorem in the right triangle ABD

Remember that the height of an equilateral triangle bisects the base.

see the attached figure to better understand the problem

$AB^2=AD^2+BD^2$

substitute the given values

$10^2=5^2+BD^2$

Solve for BD

$100=25+BD^2$

$BD^2=100-25$

$BD^2=75$

$BD=\sqrt{75}\ units$

simplify

$BD=5\sqrt{3}\ units$ `

therefore

The height of the equilateral triangle is $5\sqrt{3}\ units$

7 0

4 years ago

Please help!! 30 points!!

nasty-shy [4]

Answer:

The expected sum is $220 and the standard deviation is $65

Step-by-step explanation:

In order to get the expected sum you add the two expected sums you are given

To get the standard deviation you add the two given standard deviations

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4 years ago