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
goldenfox [79]
3 years ago
13

The average (arithmetic mean) of four numbers is 4a + 16. When a fifth number is added, the average becomes 5a + 20. The fifth n

umber is
A. a - 4
B. a + 4
C. 4a + 4
D. 4a + 16
E. 9a + 36
Mathematics
1 answer:
Jobisdone [24]3 years ago
6 0

Answer:

9a+36

Step-by-step explanation:

The average (arithmetic mean) of four numbers is 4a + 16. When a fifth number is added, the average becomes 5a + 20.

The average (arithmetic mean) of four numbers is 4a + 16.

Sum of 4 numbers = 4 times the average

Sum of 4 numbers =4(4a+16)= 16a+64

sum  of 5 numbers = 5 times the average of 5 numbers

Sum of 5 numbers =5(5a+20)=25a+100

fifth number = sum of 5 numbers minus the sum of 4 numbers

fifth \ number = 25a+100-(16a+64)

25a+100-16a-64

9a+36

You might be interested in
Classify the model as Exponential GROWTH or DECAY. <br> A=10(1.01)^3
Masteriza [31]

Answer:

GROWTH

Step-by-step explanation:

Given the Exponential function;

A=10*1.01^{3}

As we can see in the given function above:

the base number is 1.01 which is greater than 1 hence the quantity increases,

slowly at first and then very rapidly over its domain. The rate of growth becomes faster as time passes.

The growth "rate" (r) is determined as b = 1 + r.

In this situation, the rate growth is = 1.01 -1  = 0.01

Hope it will find you well.

5 0
3 years ago
What is the surface area?
finlep [7]

Answer:

c. 166

Step-by-step explanation:

area = l x w

surface area = area

8 0
2 years ago
You joined an online coupon club. You earned 100 bonus points just by signing up.
Mkey [24]

Answer:

y = 10x + 100

Step-by-step explanation:

The 100 bonus points are guaranteed, no matter if you use the site for 0 months or more. Thus, 100 is the constant, the y-intercept in a graph.

The 10 points you earn for each month is the rate of change, or slope.

The equation is:

y = 10x + 100

where x represents the number of months used, and y is the total points.

As a function, the equation is:

p(x) = 10x + 100

where x is the number of months, and p meaning points.

4 0
3 years ago
Read 2 more answers
What numbers 60, 90, 30, and 45 mean in each ratio statement?
zmey [24]

Answer:

Step-by-step explanation:

30 is half or 60

45 is half of 90

1:2 ratio

3 0
3 years ago
Find the value of x. Round your answer to the nearest tenth.
harkovskaia [24]

Answer:

3.106

Step-by-step explanation: hope this helps

3 0
2 years ago
Read 2 more answers
Other questions:
  • Simplify the difference.<br> (7w2 – 7w – 8) – (5w2 + 2w – 3)
    11·2 answers
  • Can someone please help me ?
    5·1 answer
  • Solve for x if 25^x+2=125^3x+4
    9·2 answers
  • Can someone solve this problem
    14·1 answer
  • Question 17: Please help. Which information about the coordinates of G and H will prove that GH⎯⎯⎯⎯⎯⎯⎯⎯⎯ is a midsegment of △DEF
    9·2 answers
  • 9x+6y2+15xy??<br> pleasedd!!
    12·1 answer
  • What is length of segment QR? (Show all work)
    14·1 answer
  • Can someone help me pleasee ??
    6·1 answer
  • I need help!!!!please someone tell me the answer!!!!
    15·1 answer
  • Linda already owns 10 hair bands, and additional hair bands are priced at 1 for a dollar.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!