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Vilka [71]
3 years ago
9

there are 3 black marbles in and 4 red marbles in a bag. what is the probability that you will pick two black marbles put of the

bag without replacing the first one?
Mathematics
1 answer:
professor190 [17]3 years ago
5 0

|\Omega|=7\cdot6=42\\ |A|=3\cdot2=6\\\\ P(A)=\dfrac{6}{42}=\dfrac{1}{7}\approx14\%

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A store pays $10 for a blanket, and the markup is 115%. A customer will also pay a 5 1/2% sales tax. What will be the total cost
Naddik [55]
Firstly, we need to find the price of the blanket/bracelet after the 115% increase.
     $10 x 1.15 = $15.20

Now for the 5.5% sales tax, which is applied the the new value of $15.20
     $15.20 x 0.055 = 0.83
     $15.20 + $0.83 = $16.03

The final cost for the blanket/bracelet is %16.03
8 0
3 years ago
Ron bought 6 tickets to a concert by the orchestra in his town. If he gave the cashier $75 and received $3 in change, how much d
Harman [31]
75-3= 72
72/6= 12
Each ticket costs $12.00
8 0
3 years ago
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In determining the quality of the hats in a used-hat bin, a grandmother selects the first four hats she can reach. Which samplin
Sladkaya [172]
B convenience sampling because if it looks bad then she should throw it away but if it looks good then she should keep it 
3 0
3 years ago
7. The points (3,5) and (2, y) are on a line with a slope of 3. Find y.​
PtichkaEL [24]

Answer:

We get value of y: y = 2

Step-by-step explanation:

The points (3,5) and (2, y) are on a line with a slope of 3. Find y.​

We can find y using formula of finding slope of a line.

The formula is: Slope=\frac{y_2-y_1}{x_2-x_1}

We have x_1=3, y_1=5, x_2=2, y_2=y and Slope = 3

Putting values and finding y

Slope=\frac{y_2-y_1}{x_2-x_1}\\3=\frac{y-5}{2-3}\\3=\frac{y-5}{-1}\\-1(3)=y-5\\-3=y-5\\y=-3+5\\y=2

So, we get value of y: y = 2

5 0
2 years ago
Solve 5w + 3 = 3w + 10
OverLord2011 [107]
X=7/12
Alright so let's solve this! :)
••• Subtract 3w from both sides.
<span><span><span><span>5w</span>+3</span>−<span>3w</span></span>=<span><span><span>3w</span>+10</span>−<span>3w</span></span></span><span><span><span>2w</span>+3</span>=10
</span>••• Subtract 3 from both sides.
<span><span><span><span>2w</span>+3</span>−3</span>=<span>10−3</span></span><span><span>2w</span>=7
</span>••• Divide both sides by 2.
<span>2w/2</span>=<span>7/<span>2
</span></span>=<span>7/2
and then 7/2=3.5
</span>
5 0
3 years ago
Read 2 more answers
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