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erastovalidia [21]
3 years ago
5

Pls help pls pls pls pls

Mathematics
2 answers:
Oksana_A [137]3 years ago
6 0

Answer:

The smaller x = -2/5

f(x)=(x-5)(5x +2)=0

The larger x = 5

Step-by-step explanation:

hope it helped :) please mark brainliest :)

dimaraw [331]3 years ago
3 0

Step-by-step explanation:

f(x)=(x-5)(5x +2)=0

=> x=5 or, x=-2/5

smaller x = -2/5

larger x=5

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The weekly amount spent by a small company for in-state travel has approximately a normal distribution with mean $1450 and stand
Llana [10]

Answer:

0.0903

Step-by-step explanation:

Given that :

The mean = 1450

The standard deviation = 220

sample mean = 1560

P(X > 1560) = P( Z > \dfrac{x - \mu}{\sigma})

P(X > 1560) = P(Z > \dfrac{1560 - 1450}{220})

P(X > 1560) = P(Z > \dfrac{110}{220})

P(X> 1560) = P(Z > 0.5)

P(X> 1560) = 1 - P(Z < 0.5)

From the z tables;

P(X> 1560) = 1 - 0.6915

P(X> 1560) = 0.3085

Let consider the given number of weeks = 52

Mean \mu_x = np = 52 × 0.3085 = 16.042

The standard deviation =  \sqrt {n \time p (1-p)}

The standard deviation = \sqrt {52 \times 0.3085 (1-0.3085)}

The standard deviation = 3.3306

Let Y be a random variable that proceeds in a binomial distribution, which denotes the number of weeks in a year that exceeds $1560.

Then;

Pr ( Y > 20) = P( z > 20)

Pr ( Y > 20) = P(Z > \dfrac{20.5 - 16.042}{3.3306})

Pr ( Y > 20) = P(Z >1 .338)

From z tables

P(Y > 20) \simeq 0.0903

7 0
3 years ago
What is the value of x in the equation x - y = 30, when y = 15?
igor_vitrenko [27]

Answer:

o 200

fctvtvtv

Step-by-step explanation:

O200 o200

6 0
2 years ago
Let $r$ and $s$ be the roots of $3x^2 + 4x + 12 = 0.$ Find $r^2 + s^2.$ Pls help.
nirvana33 [79]

Answer:

-56/9

Step-by-step explanation:

By Vieta's formulas,

$r + s = -\frac{4}{3}$ and $rs = \frac{12}{3} = 4.$ Squaring the equation $r + s = -\frac{4}{3},$ we get

$r^2 + 2rs + s^2 = \frac{16}{9}.$ Therefore,

$r^2 + s^2 = \frac{16}{9} - 2rs = \frac{16}{9} - 2 \cdot 4 = -\frac{56}{9}}$

5 0
3 years ago
What does the x equal In this problem?
jeka57 [31]

Answer:

140

Step-by-step explanation:

5 0
2 years ago
10 x 3 thousands in standard form
valina [46]
The answer is 30,000
7 0
3 years ago
Read 2 more answers
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