8-3n as an word expression?

2 answers:

7 0

☆The answer to your question shall be Eight less than three times a number.☆

☆I hope this helps!☆

Paha777 [63]3 years ago

5 0

Did you want to know if it was a word expression or what? The word expression is eight less than three times a number

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A jar contains two blue and five green marbles. A marble is drawn at random and then replaced. A second marble drawn at random.

DerKrebs [107]

corrected question:A jar contains two blue and five green marbles. A marble is drawn at random and then replaced. A second marble drawn at random. For each of the following, find the probability that: a) both marbles are blue b) both marbles are the same color c)the marbles are different in color

Answer:

Step-by-step explanation:

The probability was done with replacement.

Probaility of an event happening $=\frac{number of required outcomes}{number of possible outcomes}$

number of blue marbles= 2

number of green marbles=5

total number of marbles=7

(a) probability that both marbles are blue = pr(first is blue)*pr(second is blue)

$=\frac{2}{7}*\frac{2}{7}$

$=\frac{4}{49}$

(b)probability that both marbles are the same color =pr(first is blue)*pr(second is blue) + Pr(first is green)*Pr(second is green)

$=\frac{4}{49} + \frac{5}{7}*\frac{5}{7}$

$=\frac{4}{49} + \frac{25}{49}$

$=\frac{29}{49}$

(c)Probability that the marbles are different in colors=pr(first is blue)*pr(second is green) + Pr(first is green)*Pr(second is blue)

$=\frac{2}{7}*\frac{5}{7}+ \frac{5}{7}*\frac{2}{7}$

$=\frac{10}{49}+\frac{10}{49}$

$=\frac{20}{49}$

6 0

3 years ago

7x + 5 = -16 what is the answer? x= ?

Pachacha [2.7K]

Answer: x=-3

Step-by-step explanation:

7x+5-5=-16-5

7×/7=-21/7

X=-3

3 0

3 years ago

Read 2 more answers

Solve for x y=×/c+b

Alex17521 [72]

$\text{Hello there!}\\\\\text{Solve for x:}\\\\y=\frac{x}{c}+b\\\\\text{Multiply both sides by c to cancel the c out of the denominator}\\\\yc=x+bc\\\\\text{Subtract both sides by bc}\\\\yc-b=x\\\\\boxed{\text{Answer: yc - bc = x}}$