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jonny [76]
3 years ago
12

(2x + 3)^2 I have more

Mathematics
1 answer:
Evgesh-ka [11]3 years ago
7 0

Answer:

Step-by-step explanation:

(2x+3)^2=4x+9

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A college football coach has decided to recruit only the heaviest 15% of high school football players. He knows that high school
Alla [95]

Answer:

The coach should start recruiting players with weight 269.55 pounds or more.                                                    

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 225 pounds

Standard Deviation, σ = 43 pounds

We are given that the distribution of weights is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.15

P( X > x) = P( z > \displaystyle\frac{x - 225}{43})=0.15  

= 1 -P( z \leq \displaystyle\frac{x - 225}{43})=0.15  

=P( z \leq \displaystyle\frac{x - 225}{43})=0.85  

Calculation the value from standard normal z table, we have,  

P(z < 1.036) = 0.85

\displaystyle\frac{x - 225}{43} = 1.036\\\\x = 269.548 \approx 269.55

Thus, the coach should start recruiting players with weight 269.55 pounds or more.

3 0
3 years ago
Need some help on this question please:(​
xxTIMURxx [149]

Answer:

B

Step-by-step explanation:

sorry if its wrong

5 0
3 years ago
I also need help with this one
solmaris [256]
The amount of pizza Mark would have is
\frac{1}{6}  +  \frac{1}{4}
Find the common denominators first. 2/12 + 3/12 = 5/12. Two slices of the 6 slice pizza is 1/3 or 4/12.
6 0
3 years ago
If x - y =5, x + y =1, then x^2 - y^2= ??<br><br>+explanation please and thanks​
Sveta_85 [38]
<h3>Answer:  5</h3>

=================================

Explanation:

Apply the difference of squares rule

x^2 - y^2 = (x-y)(x+y)

x^2 - y^2 = (5)(1)

x^2 - y^2 = 5

----------

Alternatively, you can solve the system

\begin{cases}x-y=5\\x+y = 1\end{cases}

for x and y to get (x,y) = (3,-2).

Then compute x^2-y^2 = 3^2-(-2)^2 = 9-4 = 5

8 0
2 years ago
Identify the slope of the line for the equation y = −
Lunna [17]

Answer:pretty sure it’s A. but the way you typed the things out I can’t tell

Step-by-step explanation:

7 0
3 years ago
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