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
Nikolay [14]
3 years ago
12

The average of 7 numbers is 45.If the last two numbers are 27 and 43 what is the average of the first five

Mathematics
1 answer:
Paul [167]3 years ago
4 0

Answer:

49

Step-by-step explanation:

The average is calculated as

average = \frac{sum}{count} Given the average of 7 numbers is 45 , then

\frac{sum}{7} = 45 ( multiply both sides by 7 )

sum of 7 numbers = 315

Subtract 27, 43 from the sum to obtain the sum of first 5 numbers

315 - (27 + 43) = 315 - 70 = 245 , then

average of first 5 numbers = \frac{245}{5} = 49

You might be interested in
The quadrilaterals JKLM and PQRS are similar.<br> Find the length x of SP.
Anna35 [415]
8.4 is your answer to this question
7 0
3 years ago
WILL MARK BRAINLIEST
NeTakaya

Answer:

3x-4 = x+10

x = 7

Follow through with the words and then simplify.

5 0
3 years ago
Read 2 more answers
A rectangular prism has a length of 5/2 ft, width of 9/6 ft, and height of 2/3 ft. what is its volume?
ivanzaharov [21]
The formula of the volume of the rectangular prism:

V = length × width × height

We have:
l=\dfrac{5}{2}ft\\\\w=\dfrac{9}{6}ft\\\\h=\dfrac{2}{3}ft\\\\V=l\cdot w\cdot h=\dfrac{5}{2}\cdot\dfrac{9}{6}\cdot\dfrac{2}{3}\\\\=\dfrac{5}{2}\cdot\dfrac{1}{1}\cdot\dfrac{1}{1}=\dfrac{5}{2}=2.5ft.^3
6 0
3 years ago
Find the probability that the mean annual preciptiation will be between 32 and 34 inches. variable is normally distributed
liq [111]
Supposing, for the sake of illustration, that the mean is 31.2 and the std. dev. is 1.9.

This probability can be calculated by finding z-scores and their corresponding areas under the std. normal curve.  
                                                                     34 in - 31.2 in
The area under this curve to the left of z = -------------------- = 1.47 (for 34 in)
                                                                           1.9
                                                                      32 in - 31.2 in
and that to the left of 32 in   is               z = ---------------------- = 0.421
                                                                             1.9

Know how to use a table of z-scores to find these two areas?  If not, let me know and I'll go over that with you.


My TI-83 calculator provided the following result:

normalcdf(32, 34, 31.2, 1.9) = 0.267  (answer to this sample problem)

5 0
3 years ago
Calculate 21+22+23+24...+81
Kryger [21]
The answer is 171 your welcome
8 0
3 years ago
Other questions:
  • What type of polynomial is P(x) = 7x3 + 2x2 – 3x4?
    7·1 answer
  • Which equation is being graphed here?
    12·1 answer
  • 5x - 12 = 13, solve using algebra.
    12·2 answers
  • On a coordinate plane, an exponential function approaches y = 0 in quadrant 2. It increases into quadrant 1 and goes through (1,
    9·2 answers
  • Simplify 5−4y+​(−6y​)+5.4.
    15·1 answer
  • Find the slope of the line that passes through the following points (2,5) (5,11)
    8·2 answers
  • If f(x + 2) = 2x + 3 then find f-'(4).​
    7·1 answer
  • For the function f(x) =
    11·1 answer
  • What is the solution to the inequality 2(x+9/4)&gt;3
    5·1 answer
  • A triangle has two angles with measures of 90 and 20 degrees joined by a side with a length of 12 centimeters.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!