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slega [8]
2 years ago
15

Which step will get you closest to the solution of this equation? 5⋅(x−2)=7

Mathematics
1 answer:
Paul [167]2 years ago
4 0
When you divide both sides by 5
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Consider the following hypothesis test:H0: 20Ha: < 20A sample of 60 provided a sample mean of 19.6. The population standard d
elixir [45]

Answer:

a: z = -1.936

b: 0.0265

d: z < -1.645

Reject H0 if z < -1.645

Step-by-step explanation:

We are given:

H0:  µ = 20

HA:  µ < 20

n = 60, sample mean: 19.6, σ = 1.6

Since the alternate hypothesis has a < sign in it, it is a left tailed test.  The < or > sign in the alternate hypothesis points towards the rejection region.

For a:  We need to calculate the test statistic for our situation.  This is done with a z-score formula for samples.  

For b:  we need to use the z-score table to look up the p-value for the score we calculate in part a.  The p-value is 0.0265.  This means that there is only about a 2.65% chance that the sample values were a result of random chance.

For d:  Since the significance level is 0.05, and this is a one tailed test, we have a critical value of z < - 1.645.  This means that if the z-score we calculate in part a is less than -1.645, we will reject the null hypothesis

See attached photo for all the calculations!

4 0
3 years ago
you bought an antique porcelain doll for $15 at an estate sale. you get it appraised and you are told that the doll is woth $150
Zinaida [17]
You would do 150/15=10 since this is a percent change it to a decimal(.10) to check do 150x.10=15 and 15/.10=150
5 0
3 years ago
Read 2 more answers
PLEASE HELP!! i'm writing a test and i have no idea how to do this. (I'm giving 30 points)
Vesna [10]

Answer:

12/y

Step-by-step explanation:

if you see in the picture the first three numbers 3,6 and 9 you add 3 in each number like 3+3=6 then 6=3 = 9 and 9 + 3 = 12 and so on. ( 45 also comes in this pattern )

have a wonderful day

8 0
2 years ago
Two-step equations - integers
Andrews [41]
Question 1. -3 + v5 = 0
Work : -3 + 5v = 0
5v = 3 ( divide )
answer v = 3/5

Question 2. 1 - 7B = -20
work : -7b = -20 - 1
-7b = -21 ( divide )
answer b = 3

question 3 : -k - 5 = 0
work : -k = 5
answer : k = - 5

Question 4 : -1 + 8a = 129
work : 8a = 129 + 1
8a = 130 (divide )
answer a = 65/4

3 0
2 years ago
Read 2 more answers
On a local sports team, 20% of 50 players are left-handed. How many left-handed players are on the team?
never [62]

Answer:

Step-by-step explanation:

50*20%=10

10 players are left-handed.

8 0
3 years ago
Read 2 more answers
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