Simplify. Your answer should contain only positive exponents −ab^2•(2a^0b^-4)^-4•2a^4b^-1

Please please help me out!!

Roman55 [17]

Answer:

And step-by-step explanation

7 0

4 years ago

Read 2 more answers

Use the identity a^3+b^3=(a+b)^3−3ab(a+b) to determine the sum of the cubes of two numbers if the sum of the two numbers is 4 an

Butoxors [25]

$a^3+b^3=(a+b)^3-3ab(a+b)\\\\a+b=4,\ ab=1\\\\\text{Substitute:}\\\\a^3+b^3=(4)^3-3(1)(4)=64-12=52$

5 0

3 years ago

Which of the sets of ordered pairs represents a function? (4 points) A = {(−4, 5), (1, −1), (2, −2), (2, 3)} B = {(2, 2), (3, −2

elena55 [62]

A function will not have any repeating x values....it can have repeating y values, just not the x ones

(-4,5),(-1,1),(2,-2),(2,3)
this is not a function because it has 2 sets of points that has x as 2...so it has repeating x values

(2,2),(3,-2),(9,3),(9,-3)
this is not a function because it has 2 sets of points that has an x value of 9...so it also has repeating x values

so both of these are not functions.....neither of them

6 0

3 years ago

What is the area of a 320 ft semicircle?

Sever21 [200]

Answer: they do not have enough info but I will try my best to answer if im wrong its not my fault so please add more info

Solution

2. I know that for a Semi-Circle Area = 320 . From this find out Area of the Semi-Circle.

Solution:

Here Area=320(Given)

Area=

πr2

2

r2=

Area⋅2

π

r2=

320⋅2

22

7

r=14.2701

Diameter(d)=2r

=2⋅14.2701

=28.5402

Circumference=πr

=

22

7

⋅14.2701

=44.849

Perimeter=πr+2r

=

22

7

⋅14.2701+2⋅14.2701

=44.849+28.5402

=89.6979

Step-by-step explanation:

Byee stay safe: Wear your mask, drink water and stan bts

also can I have brainliest

4 0

2 years ago

The alkalinity level of water specimens collected from the Han River in Seoul, Korea, has a mean of 50 milligrams per liter and

Sati [7]

Answer:

a) 94.06% probability that a water specimen collected from the river has an alkalinity level exceeding 45 milligrams per liter.

b) 94.06% probability that a water specimen collected from the river has an alkalinity level below 55 milligrams per liter.

c) 50.98% probability that a water specimen collected from the river has an alkalinity level between 48 and 52 milligrams per liter.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 50, \sigma = 3.2$