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Maurinko [17]
3 years ago
10

What is 5(a-5b)(a+b)​

Mathematics
1 answer:
Vaselesa [24]3 years ago
5 0

Answer:

10a-20b

Step-by-step explanation:

5a-25b+5a+5b

10a-20b

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Various studies indicate that approximately 11% of the world's population is left handed. You think this number is actually high
Irina-Kira [14]

Answer:

a. H0 : p ≤ 0.11 Ha : p >0.11 ( one tailed test )

d. z= 1.3322

Step-by-step explanation:

We formulate our hypothesis as

a. H0 : p ≤ 0.11 Ha : p >0.11 ( one tailed test )

According to the given conditions

p`= 31/225= 0.1378

np`= 225 > 5

n q` = n (1-p`) = 225 ( 1- 31/225)= 193.995> 5

p = 0.4 x= 31 and n 225

c. Using the test statistic

z=  p`- p / √pq/n

d. Putting the values

z= 0.1378- 0.11/ √0.11*0.89/225

z= 0.1378- 0.11/ √0.0979/225

z= 0.1378- 0.11/ 0.02085

z= 1.3322

at 5% significance level the z- value is ± 1.645 for one tailed test

The calculated value falls in the critical region so we reject our null hypothesis H0 : p ≤ 0.11 and accept  Ha : p >0.11 and  conclude that the data indicates that the 11% of the world's population is left-handed.

The rejection region is attached.

The P- value is calculated by finding the corresponding value of the probability of z from the z - table and subtracting it from 1.

which appears to be 0.95 and subtracting from 1 gives 0.04998

8 0
3 years ago
HELP! WILL MARK BRAINLIEST IF CORRECT!
mariarad [96]
I think it’s 25???? i tried haha
8 0
3 years ago
Marty’s dog can run 3 miles in 20 minutes. What is the dog’s speed in miles per hour?
stich3 [128]
9mph because 20 minutes time 3 is one hour so multiply 3 by 3 to get 9
7 0
3 years ago
Read 2 more answers
for a recipe Peter uses 2 cups of sugar for every 3 cups of flour which table shows equivalent ratios for this table
Novosadov [1.4K]

Answer:  

4 to 6  


Step-by-step explanation:

if you do 2 times 2 which is 4 then you do 3 times which is 6 then you get your answer

4 0
3 years ago
NO LINKS PLEASE help
liubo4ka [24]

Answer:

Midpoint for A is (1,5) and for B it is (2.5,4.5)

Step-by-step explanation:

To get the midpoint you add the x coordinates and divide by 2 and then the y coordinates and divide by 2.

X = (3 + -1)/2    y = (8+ 2)/2

   =2/2 = 1             10/2=5

7 0
3 years ago
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