1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
galina1969 [7]
3 years ago
12

Evaluate 3z + 2[z-1) when z = 5

Mathematics
1 answer:
Gnesinka [82]3 years ago
7 0

Answer:

23

Step-by-step explanation:

3z + 2(z-1)

Let z=5

3*5 +2( 5-1)

15 +2(4)

15+8

23

You might be interested in
Construct the indicated confidence interval for the difference between the two population means. Assume that the two samples are
Kruka [31]

Answer:

Step-by-step explanation:

The formula for determining the confidence interval for the difference of two population means is expressed as

Confidence interval = (x1 - x2) ± z√(s²/n1 + s2²/n2)

Where

x1 = sample mean of type A paint

x2 = sample mean of type B paint

s1 = sample standard deviation type A paint

s2 = sample standard for type B paint

n1 = number of samples of type A paint

n2 = number of samples of type B paint

From the information given,

x1 = 75.7

s1 = 4.5

n1 = 11

x2 = 64.3

s2 = 5.1

n2 = 9

x1 - x2 = 75.7 - 64.3 = 11.4

√(s1²/n1 + s2²/n2) = √(4.5²/11 + 5.1²/9) = √4.709

Degree of freedom = (n1 - 1) + (n2 - 1)

df = (11 - 1) + (9 - 1) = 18

For the 98% confidence interval, the z score from the t distribution table is 2.552

Margin of error = 2.552√4.709 = 5.55

The upper boundary for the confidence interval is

11.4 + 5.55 = 16.95 hours

The lower boundary for the confidence interval is

11.4 - 5.55 = 5.85 hours

The correct option is

B. 5.85 hrs < μ1 - μ2 < 16.95 hrs

4 0
3 years ago
What does 5x+8squared-9x+2xsquared
umka21 [38]
The answer is -4x+64+2x^2
7 0
3 years ago
Read 2 more answers
A resercher is wondering whehter the drinking habits of adults in a certain region of the country are in the same proportion as
Andrews [41]

Answer:

Answer for the question :

A resercher is wondering whehter the drinking habits of adults in a certain region of the country are in the same proportion as the general population of adults. Suppose a recent study stated that the proportion of adults who reported drinking once a week or less in the last month was 0.26. The researcher's null hypothesis for this test is H0: P=0.26 and the alternative hypothesis is Ha; P> 0.26. The researcher collected datat from a random sample of 75 adults in the region of interest.

1- Verify that the normality assumption is satisfied. Describe each separately.

2- To cotinue the study into the drinking habits of adults, the researcher decides to collect datat from adults working in "blue collar" jobs to see whether their drinking habits are in the same proportion as the general public. The null hypothesis for this test is H0: P=0.26 and the alternative hypothesis is Ha: P>0.26. The researcher computer the test statistic to be 1.59. Draw a graph of z distribution, label the test statistic and shade the p-value associated with this test statistic."

is given in the attachment.

Step-by-step explanation:

3 0
3 years ago
What kind of number is 3 2/3?
makvit [3.9K]

Answer:

Step-by-step explanation:

it is irrational   explanation i no it is

7 0
3 years ago
Here is the histogram of a data distribution. All class widths are 1. What is the median of the distribution? A.5 B.4 C.6 D.7
erik [133]

Answer:

5

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Please help me Im in a huge rush
    13·1 answer
  • Question 3<br> BESED<br> what is the slope?<br> (-7,-4) (-14, 3)
    5·1 answer
  • Use the given data valuesâ (a sample of female arm circumferences inâ centimeters) to identify the corresponding z scores that a
    11·1 answer
  • Rectangular park 5/6 wide and 1 and 5/7 miles long what area is it HJELP DO IT SIMPLEST FORM
    8·1 answer
  • Areas of the circles ?
    11·1 answer
  • Answer the following questions CORRECTLY I will know if this is wrong. I WILL REPORT ANY INCORRECT ANSWERS!
    5·1 answer
  • ONLY ANSWER IF YOU KNOW THIS ILL GIVE CORRECT ANSWER BRAINLIEST
    12·1 answer
  • Your resturaunt bill is 42$ you want to leave a 15% tip, what should the tip be
    11·2 answers
  • Help please I’m confused?? I
    11·1 answer
  • IN Date OUT IN OUT Employee Time Card: 7:30 10/1 11:30 4:15 12:00 John Apple 10/2 8:15 11:00 5:15 11:45 10/3 11:15 3:55 7:00 12:
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!