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2 years ago

Expand and simplify. (x+4)squared

2 answers:

8 0

(x+4)²= (x+4)×(x+4)

Use the FOIL method to simplify

F=First (multiply the first number of each expression)
O=Outside (multiply the outside edges of each expression)
I= Inside (multiply the inside edges of each expression)
L= Last (multiply the last number of each expression)

x times x= x²
x times 4= 4x
4 times x= 4x
4 times 4= 16

Add them together, we have: x²+4x+4x+16
We can simplify this by adding like terms
4x+4x=8x

Final expression= x² + 8x + 16

Setler79 [48]2 years ago

6 0

$(x+4)^2 = x^2 + 2(x)(4) + 4^2 .....................(By-identity) \\ \\ => x^2 + 8x + 16$

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2 years ago

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Pulse rates of women are normally distributed with a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per mi

miss Akunina [59]

Answer:

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Step-by-step explanation:

We are given the following in the question:

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Standard Deviation, σ = 11.6 beats per minute

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

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2 years ago

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Answer:

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Step-by-step explanation:

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