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3 years ago

10

Write the equation that goes with the situation: Ms. Conrad is 7 years older than 3 times her sister Emma’s age. Ms. Conrad is 2

8. (use x as the variable) *

2 answers:

OverLord2011 [107]3 years ago

6 0

3x+7=28
x=7

I got x=7 because you have to subtract 7 from both sides and divide 21 by 3.

Lilit [14]3 years ago

5 0

(28 - 7 ) = (21 Divided by 7) = 3 ??

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Answer:

$P(B)=\frac{1}{3}$

Step-by-step explanation:

The number of red marbles in the bag is; $n(R)=3$ .

The number of blue marbles in the bag is; $n(B)=4$ .

The number of white marbles in the bag is; $n(W)=5$ .

The total number of marbles in the bag is: $n(S)=3+4+5=12$ .

The probability of selecting a blue marble is $P(B)=\frac{n(B)}{n(S)}$

We substitute the given information to obtain:

$P(B)=\frac{4}{12}$

We simplify to obtain:

$P(B)=\frac{1}{3}$

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