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
svp [43]
3 years ago
9

The librarian was checking the thicknesses of several books and found that the average thickness of a book was 1.8 centimeters.

She found this by averaging the thicknesses of five different books. Four of the thicknesses were 1.4 cm, 1.9 cm, 2.1 cm, and 2.4 cm. What was the thickness of the fifth book that she measured?
Mathematics
1 answer:
kvasek [131]3 years ago
4 0

Answer:

1.2 cm

Step-by-step explanation:

1.8 * 5 = 9

9 - (1.4 + 1.9 + 2.1 + 2.4) = 1.2

1.2 + 1.4 + 1.9 + 2.1 + 2.4 = 9

9/5 = 1.8

You might be interested in
the perimeter of a field has a perimeter of 270 feet and the length is 35 feet longer than the width. Write and graph the system
Stells [14]

Answer:

So I don't know the equation but I know the answer.

Length: 170 ft.

Width: 100 ft.

Step-by-step explanation:

The perimeter (The length all around) is 270. You do the perimeter divided by two and add 35, because we know they are almost equal except for one side is 35 ft. longer, That is your length. You the take the perimeter minus the length to get the width.

Equationish: P÷2= x+35= y -> P-y=w

Or: 270÷2= 135+35=170 -> 270-170= 100ft.

8 0
3 years ago
Melissa has 350 in her savings account. she decides that she will put the same amount of money each month into her account.Her g
Ray Of Light [21]
C = 350+xm 
mc=350+x 
m = (350+x)/c
7 0
3 years ago
Find the area of the shaded region. Round your answer to the nearest WHOLE number. (not
kicyunya [14]

Answer:

14×14=196 196 = answer correct

8 0
2 years ago
A test for marijuana usage was tried on 200200 subjects who did not use marijuana. the test result was wrong 77 times.
Alexxandr [17]
400,246 ( 200,200-77=200,123 divide by .5= 400,246
5 0
3 years ago
2) A government agency produced a study in which they randomly chose 100 students just beginning college to determine what perce
just olya [345]
The answer is B. some of the sample data are missing.

This is because out of the 100 students originally sampled by the government agency, only 88 results were taken. 

Additionally, we cannot fully take A. as the answer because a non-response error happens when sampling units are not interviewed maybe because they were unavailable or unwilling. So B. is the safer answer.
7 0
3 years ago
Other questions:
  • How much money should be deposited today in an account that earns 6% compounded semiannually so that it will accumulate to $14,0
    10·1 answer
  • Need help with 7 and 8 (explanation how I got the answers)
    6·1 answer
  • How do find the answer for the percent of a number
    9·1 answer
  • What is the value of -d<br><br> When d= -2<br><br><br> A 4<br><br> B -4<br><br> C -2<br><br> D 2
    12·1 answer
  • In trapezoid $WXYZ$, $\overline{XY} \parallel \overline{WZ}$, $\angle WXZ = 105^\circ$, $\angle W = 43^\circ$, and $\angle Y = 1
    8·1 answer
  • omar tariq has a credit card that uses the unpaid balance method to compute the finance charge. His monthly periodic rate is 2.4
    11·1 answer
  • It is estimated that 88% of senior citizens suffer from sleep disorders and 7% suffer from anxiety. Moreover, 5% of senior citiz
    11·1 answer
  • If you good with 7th grade math pls help
    14·1 answer
  • Write an equation for the scenario.
    11·1 answer
  • What is the value of this expression? 48−{(18+12)÷6}×2
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!