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3 years ago

Choose the correct vertex for the following quadratic function.

Mathematics

2 answers:

frez [133]3 years ago

7 0

Answer:

U (2,-1)

Step-by-step explanation:

if you replace x to 2, your answer will come out to be -1

liberstina [14]3 years ago

6 0

Answer:

(2,-1)

Explanation:
Formula h= - b/2a
h= -4/2*1
So h= 2 and a=-1

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The average time an individual reads online national news reports is 49 minutes. Assume the standard deviation is 16 minutes and

Olin [163]

Answer:

0.118 is the probability someone will spend no more than 30 minutes reading online national news reports.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 49 minutes

Standard Deviation, σ = 16 minutes

We are given that the distribution of time an individual reads is a bell shaped distribution that is a normal distribution.

Formula:

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

P(no more than 30 minutes)

$P( x \leq 610) = P( z \leq \displaystyle\frac{30 - 49}{16}) = P(z \leq -1.1875)$

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

$P(x \leq 30) = 0.118 = 11.8\%$

0.118 is the probability someone will spend no more than 30 minutes reading online national news reports.

3 0

3 years ago

Simplify the Expression<br> - 1/2 (8b+3)+3b=

Anna35 [415]

Answer:

-b -3/2

Step-by-step explanation:

-1/2(8b+3) + 3B (a negative times a positive equals a negative)

1. Mutiply -1/2 by 8b and then by 3

(-1/2 x 8b -1/2 x 3) + 3b

-4b - 3/2 + 3b

2. Add -4b + 3b = -b

-b - 3/2

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3 years ago

Question 1 of 10

Jet001 [13]

The answer should be true

4 0

3 years ago

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What is 37.5% of a fraction

Salsk061 [2.6K]

3/8 hope this helped

4 0

3 years ago

20/12=15/x find x plz help

Ganezh [65]

Answer:

$x = 9$

Step-by-step explanation:

To find x, we first have to solve the equation given in the question:

$\frac{20}{12} = \frac{15}{x}$

$20x = 15 \cdot 12$

$x = \frac{180}{20}$

$x = 9$

Therefore, x = 9.

Hope this helped!

3 0

3 years ago

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