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3 years ago

Evan said that the difference between two negative numbers must be negative. Was he right?

1 answer:

8 0

No
lets say a and b are positive numbers
that means -a and -b are negative
if you make the difference between these to it'd be
-a-(-b) which means -a+b, and if b>a then the difference is positive

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Chocolate chip cookies have a distribution that is approximately normal with a mean of 24.2 chocolate chips per cookie and a sta

Allisa [31]

Answer:

Percentile 5

$z=-1.64$

And if we solve for a we got

$a=24.2 -1.64*2.6=19.94$

Percentile 95

$z=1.64$

And if we solve for a we got

$a=24.2 +1.64*2.6=28.46$

Step-by-step explanation:

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

$X \sim N(24.2,2.6)$

Where $\mu=24.2$ and $\sigma=2.6$

We want to find the percentiles 5 and 95 for this case.

Percentile 5

For this part we want to find a value a, such that we satisfy this condition:

$P(X>a)=0.95$ (a)

$P(X$ (b)

We want to find a percentile with 0.95 of the area on the left and 0.05 of the area on the right it's z=-1.64. On this case P(Z<-1.64)=0.05 and P(z>-1.64)=0.05

Using this condition we got:

$P(X$

$P(z$

Replacing we got:

$z=-1.64$

And if we solve for a we got

$a=24.2 -1.64*2.6=19.94$

Percentile 95

$z=1.64$

And if we solve for a we got

$a=24.2 +1.64*2.6=28.46$

4 0

4 years ago

Help pls i need help on this last math area equation. and explain also.

BlackZzzverrR [31]

Answer:

Step-by-step explanation:c

5 0

3 years ago

Read 2 more answers

1. Real numbers that cannot represent as a quotient of two integers are ____ numbers.

Solnce55 [7]

1. Irrational
2. Additive inverse
3. Like terms
4. Absolute value
5. Inductive reasoning

7 0

3 years ago

A. 6x^3+18x b.6x^2+3 c.36x^2+18 d. 36x^2+3

zzz [600]

The answer: 6x^3+18x

The Explanation: You need to uses distributive property to 6x to x^2+3 which will be 6x^3+18x

6 0

3 years ago

In a village the number of houses and the number of flats are in the ratio 9:5 the number of flats and the number of bungalows T

Makovka662 [10]

Answer:

Total no. of houses = 140

Step-by-step explanation:

Let there are 9x flats and 5x bungalows.

Total bungalows = 50

It means,

5x = 50

x = 10

No of flats = 9x

= 9(10)

= 90

Total houses = no. of flats + no. of bungalows

= 50+90

= 140

So, there are 140 houses in the village.

5 0

3 years ago