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4 years ago

#1 What is the difference between an expression and an equation?

1 answer:

3 0

An expression is a number, a variable, or a combination of numbers and variables and operation symbols. An equation is made up of two expressions connected by an equal sign.

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If 2 is a factor of a number, is that number a prime number? <br><br> ___________ explain

Nataliya [291]

Yes it is. It is the only even number that is prime that is multiplied by 1.

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3 years ago

HELP 20 POINTS PLZ RAHHHH

schepotkina [342]

Answer:

answer is option D : 42m+12

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3 years ago

Evaluate 3b2 when b= 4 and when b= - 4.<br> When b=4, 3b2

nydimaria [60]

Answer:

Step-by-step explanation:

3 times 4 times 2

3 times 4 is 12

12 times 2 is 24

Hope this helps you

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3 years ago

Read 2 more answers

Order of Operation?

SVETLANKA909090 [29]

30-6=24-3=21+2=23

3x2=6

Não sei se é isso

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3 years ago

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Two cards are selected from a standard deck of 52 playing cards. The first card is not replaced before the second card is select

Blizzard [7]

Answer:

Probability is: $\frac{\textbf{13}}{\textbf{51}}$

Step-by-step explanation:

From a deck of 52 cards there are 26 black cards. (Spades and Clubs).

Also, there are 26 red cards. (Hearts and Diamonds).

First, we determine the probability of drawing a black card.

P(drawing a black card) = $\frac{number \hspace{1mm} of \hspace{1mm} black \hspace{1mm} cards}{total \hspace{1mm} number \hspace{1mm} of \hspace{1mm} cards}$ $= \frac{26}{52} = \frac{\textbf{1}}{\textbf{2}}$

Now, since we don't replace the drawn card, there are only 51 cards.

But the number of red cards is still 26,

∴ P(drawing a red card) = $\frac{number \hspace{1mm} of \hspace{1mm} red \hspace{1mm} cards}{total \hspace{1mm} number \hspace{1mm}of \hspace{1mm} cards}$ $= \frac{26}{51}$

Now, the probability of both black and red card = $\frac{1}{2} \times \frac{26}{51}$

$= \frac{\textbf{13}}{\textbf{51}}$

Hence, the answer.

5 0

4 years ago