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Ronch [10]
3 years ago
13

Suppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ =

141 seconds and a standard deviation σ = 7 seconds. what is the completion time for the 200-meter backstroke for a female with a z-score of −1.64? (round answer to 1 decimal place.)
Mathematics
1 answer:
MatroZZZ [7]3 years ago
8 0

Answer :hola quoo msal

Step-by-step explanation:

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Find the value of x.
nadezda [96]

Answer:

25

Step-by-step explanation:

The median of a trapezoid equals one half of the sum of the bases

AC is a median and EB and DF are the bases.

hence AC = 1/2(EB + DF)

We are given that EB = 13 and that AC = 19. And we need to find DF

To do so we plug in what we are given and solve for DF

AC = 1/2(EB + DF)

AC = 19, EB = 13

19 = 1/2(13 + DF)

Now solve for DF

* Multiply both sides by 2*

19 * 2 = 38

1/2(13 + DF) * 2 ( the 1/2 and 2 cancel out and we're left with 13 + DF )

We then have 38 = 13 + DF

* Subtract 13 from both sides *

38 - 13 = 13 - 13 + DF

We get that DF = 25

6 0
3 years ago
5 friends go out to lunch and order 4 pizzas . The friends divided the pizzas evenly. find how much pizza each friend got as a d
Ainat [17]
0.8 I think. I'm not 100% sure
8 0
3 years ago
X^2-21.75x=-15.75 what is one solution
Jlenok [28]
Well, there are two solutions.

Add both sides by 15.75 then from here, you can use quadratic formula.

So your answer should be x = -2.44949 or 2.44949.
5 0
3 years ago
The equation of a circle is x2 + y2 + Cx + Dy + E = 0. If the radius of the circle is decreased without changing the coordinates
valkas [14]

Answer:

Option E

Step-by-step explanation:

The standard equation of circle is:- (x-h)² + (y-k)² = r²

where (h,k) is center point and r is radius

If radius r is decreased then also (h,k) remains same, only r² increases

Equation given in question is x² + y² + Cx + Dx + E=0

So, C and D will remain same but E will increase

4 0
3 years ago
Use the information in the picture.
Katarina [22]
Yes, parallelogram congruent angles theorem
8 0
3 years ago
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