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Natalka [10]
3 years ago
11

Is 42.9 a rational number

Mathematics
1 answer:
Elan Coil [88]3 years ago
3 0

Answer:

Yes.

Step-by-step explanation:

What is a rational number?

A whole number, fraction, terminating or recurring decimal.

42.9 = 429/10 which is a fraction.

So it's rational.

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Solve for the missing angle with the question mark
mash [69]

Answer:

it's 60

Step-by-step explanation:

I have done that before

4 0
3 years ago
What is the equation of a line that has a slope of 3 and a y-intercept of -3
LUCKY_DIMON [66]

The slope-intercept form:

y = mx + b

m - slope

b - y-intercept

We have m = 3 and b = -3. Substitute:

<h3>y = 3x - 3</h3>
6 0
3 years ago
Read 2 more answers
Let X represent the time it takes from when someone enters the line for a roller coaster until they exit on the other side. Cons
Yuri [45]

Answer:

a. E(x) = 3.730

b. c = 3.8475

c. 0.4308

Step-by-step explanation:

a.

Given

0 x < 3

F(x) = (x-3)/1.13, 3 < x < 4.13

1 x > 4.13

Calculating E(x)

First, we'll calculate the pdf, f(x).

f(x) is the derivative of F(x)

So, if F(x) = (x-3)/1.13

f(x) = F'(x) = 1/1.13, 3 < x < 4.13

E(x) is the integral of xf(x)

xf(x) = x * 1/1.3 = x/1.3

Integrating x/1.3

E(x) = x²/(2*1.13)

E(x) = x²/2.26 , 3 < x < 4.13

E(x) = (4.13²-3²)/2.16

E(x) = 3.730046296296296

E(x) = 3.730 (approximated)

b.

What is the value c such that P(X < c) = 0.75

First, we'll solve F(c)

F(c) = P(x<c)

F(c) = (c-3)/1.13= 0.75

c - 3 = 1.13 * 0.75

c - 3 = 0.8475

c = 3 + 0.8475

c = 3.8475

c.

What is the probability that X falls within 0.28 minutes of its mean?

Here we'll solve for

P(3.73 - 0.28 < X < 3.73 + 0.28)

= F(3.73 + 0.28) - F(3.73 + 0.28)

= 2*0.28/1.3 = 0.430769

= 0.4308 -- Approximated

5 0
2 years ago
The math test has 15 multiple choice questions, each with 3 answers. If Betty guesses correctly on the first 4 questions,
Sonbull [250]

Answer:

90 percent

Step-by-step explanation:

15 divided by 4 so 3.75 i rounded it and i got 4

8 0
3 years ago
I need help with this pls
krek1111 [17]

Answer:

<h3>Janet</h3>

Step-by-step explanation:

<h2>Because janet daily step count is 5000-9000</h2><h2>And brends step count is</h2><h3>7000-10000</h3>

<h3>Janat step count is 1000 greater than brenda.</h3>

<h3>Please mark me brainalist. </h3>
4 0
3 years ago
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