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2 years ago

Which of the following is the difference of two squares?

Mathematics

1 answer:

JulijaS [17]2 years ago

8 0

Step-by-step explanation:

ATTACHED IS THE SOLUTION!

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How to solve 5(x+10) + 2x

sveta [45]

Expand

5x+50+2x5x+50+2x

Collect like terms

(5x+2x)+50(5x+2x)+50

Simplify

The answer is 7x+50

6 0

3 years ago

The waking time of a student under common conditions is normally distributed with mean of 30 hours and a standard deviation of 5

Elina [12.6K]

Answer:

If the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 30 hours

Standard Deviation, σ = 5 hours

We are given that the distribution of waking time 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 0.95

$P( X < x) = P( z < \displaystyle\frac{x - 30}{5})=0.95$

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

$\displaystyle\frac{x - 30}{5} = 1.645\\\\x = 38.225$

Thus, if the walking time is greater than or equal to 38.225 hours, than it exceeds 95% probability that is lie in top 5%.

4 0

3 years ago

What is 10 1/2 divided by 2 1/4

victus00 [196]

Answer:

4.666666667 or 4.6_ (repeating decimal)

7 0

2 years ago

Lily says that 4x7,000 has the same product as 7x4,000.Is she correct? Explain using the associative property of multiplication

BabaBlast [244]

Its the same numbers just different orders

8 0

3 years ago

Read 2 more answers

The function y=-16t^2 +36 represents the height y (in feet) of a water droplet t seconds after falling from an icicle. After how

NikAS [45]

Answer:

1.5 seconds

Step-by-step explanation:

plug 0 in for y

0=-16t^2+36

then slove for t

-36=-16t^2

-36 / -16 = 9/4

9/4=t^2

square root of 9/4 is 3/2 or 1.5

t=1.5

3 0

2 years ago