The formula below is the general form of which of the following formulas?X= -b+-(√b^2 - 4ac)
/2a
A. Distance formula
B. Discriminant formula
C. Quadratic formula
D. Slope formula

Answers

Answer 1

Answer: C- quadratic formula

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The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of .5 minutes. What is the probability that a conversation lasts longer than 3 minutes?0.043351
0.063748
0.02275
0.095424

Answers

Let x be a random variable representing the length of a text messaging conversation, then
P(x > 3) = 1 - P(x < 3) = 1 - P(z < (3 - 2)/0.5) = 1 - P(z < 2) = 1 - 0.97725 = 0.02275

The probability that a conversation lasts longer than 3 minutes is 0.02275.

How to Calculate the Probability

Given:

Mean= 2 minutes
Standard deviation= 0.5 minutes

We would use x to denote the random variable.

Next to find the probability that a conversation lasts longer than 3 minutes is:

P(x > 3) = 1 - P(x < 3)

1 - P(z < (3 - 2)/0.5)

= 1 - P(z < 2)

= 1 - 0.97725

= 0.02275

Answers

what is this number?

if 60%x=18

then

$(60)/(100)$ x=18

$(6)/(10)$ x=18
$(3)/(5)$ x=18
3x=18*5
x=6*5
x=30

and 89% of it:
$(89)/(100)$ *30= $(89)/(10)$ *3=26.7 which is the answer

Five ninths times the difference of f and 32

Answers

If we put that into an equation, we get
(5/9)(f/32)
because "five ninths" is a fraction, "times" is multiplication (which can be represented by parenthesis), "the difference" is division, and "the difference of f and 32" is a fraction.

The graph of the function f(x) = –(x + 3)(x – 1) is shown below.

Answers

Answer:

Step-by-step explanation:

it is a downward parabola cutting x-axis at (-3,0),(1,0)

f(x)=-(x+3)(x-1)

=-(x²+2x-3)

=-(x²+2x+1-1-3)

=-(x+1)²+4

vertex is (-1,4)

A tile factory earns money by a flat fee for delivery and sales price per tile sold. For one customer the tile factory shipped 10,000 units of retail stores at the rate of $0.25 Per tile. The total tile factory earned from that sale was 3000 which of the following equation describes the revenue of the tile from this sale in terms of tiles Sold?
A) y=0.25x+10,000
B) y=0.25x+3,000
C) y=0.25x+500
D) y=0.25x+0.25

Answers

$0.25 X 10,000 = $2500.
We now know what the total sales price per tile sold was $2500.

$3000
-$2500
=$0500

We now know that the flat fee was $500.

Therefore the equation describing the revenue of the tile from this sale in terms of tiles sold is y = 0.25x + 500
The answer is C)

A car travels 210 km in 3 hours. How far does it travel in 30 minutes ?