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Mazyrski [523]
3 years ago
12

Karen has a coupon for 40% off of one item. She decided to use it for a pair of boots that cost $31. How much will she end up pa

ying (before tax)?
Mathematics
1 answer:
77julia77 [94]3 years ago
4 0

Answer:18.6

Step-by-step explanation: 40 divided by 100=0.4, 0.4 x 31= 12.4, 31-12.4=18.6

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Water use in the summer is normally distributed with a mean of 311.4 million gallons per day and a standard deviation of 40 mill
r-ruslan [8.4K]

Answer: 0.965

Step-by-step explanation:

Given : Water use in the summer is normally distributed with

\mu=311.4\text{ million gallons per day}

\sigma=40 \text{ million gallons per day}

Let X be the random variable that represents the quantity of water required on a particular day.

Z-score : \dfrac{x-\mu}{\sigma}

\dfrac{350-311.4}{40}=0.965

Now, the probability that a day requires more water than is stored in city reservoirs is given by:-

P(x>350)=P(z>0.965)=1-P(z

We can see that on comparing the above value to the given P(X > 350)= 1 - P(Z < b) , we get the value of b is 0.965.

4 0
3 years ago
M angle a=40° then m angle b=?​
grigory [225]

Answer:

not enough info

Step-by-step explanation:

5 0
3 years ago
2,100 divided by 2? (explain the steps)
ZanzabumX [31]

Answer:

1050

Step-by-step explanation:

1. divide using long division

put 2 outside and the 2100 inside

then from there 2 goes into 2 once so put that on top. Next 2 cant go into one so put a zero above the one. After that 2 goes into 10 5 times so put a 5 above the first zero in 2100. Lastly 2 goes into zero 0 times so put a zero above the second zero.

3 0
3 years ago
Read 2 more answers
Which operation should be performed first according to the order of operations?
amid [387]

Answer:

5+ 20 is the first thing that you do in the equation you  do 5+20x3 then you do minus 12 then you can solve the equation straight across. you follow the rule PEMDAS. parenthesis, exponents, multiplication, division, addition, subtraction.

Step-by-step explanation:


7 0
3 years ago
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What property will you use to solve this equation;<br> 19+n=30
mr Goodwill [35]

Answer:

i think its multiplication property of equality

Step-by-step explanation:

19 + n = 30

19 + n - 19 = 30 - 19

n = 11

6 0
3 years ago
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