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
Naddik [55]
3 years ago
12

Cory's average score after 8 tests is 91%. If he gets a 78% on his 9th test what will his new average be?

Mathematics
1 answer:
Luda [366]3 years ago
3 0
You should be able to multiply 91 by 8 to get the sum of the first 8 tests, then add the score on the 9th test. Then to get the average of the sum of the 9 tests you need to divide it by 9.
((91*8)+78)/9=89.555555555555.... So, 90%
You might be interested in
an investment will pay $100 at the end of each of the next 3 years, $200 at the end of year 4, $300 at the end of year 5, and $5
lana [24]

Answer:

NPV = $923.98

FV = $1466.23

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
HELP ASAP WILL GIVE BRAINLIEST IF CORRECT
Anna35 [415]
The expression that can be used is 3.14 (6x4+6^2)

The surface area is 188.4
5 0
3 years ago
Read 2 more answers
PLEASEE HELP ANYONE
Diano4ka-milaya [45]
There are two blue marbles so you have a 2/8 probability of drawing a blue marble on each draw since the marble is replaced after the first draw. 2/8 can be simplified to be 1/4 and then converted to be 0.25 per draw. 0.25 plus 0.25 equals 0.5. Since we are dealing with percentages multiply 0.5 x 100 which equals 50. Now take 50 and divided by the total number of marbles in the bag which is 8. 50 divided by 8 equals 6.25. So it would be about 6%.
8 0
3 years ago
What is the length of the hypotenuse of a right triangle if each of the two legs is 4 units? square root of 8 units 4 units squa
ycow [4]
By the Pythagoras theorem, in a right triangle with the sides being a and b,

 a² + b² = Hypotenuse²

Hypotenuse² = 4² + 4²

Hypotenuse² = 16 + 16 = 2*16

Hypotenuse = √2 * √16

Thus, hypotenuse = 4√2


7 0
3 years ago
Read 2 more answers
What is the approximate perimeter?
vladimir1956 [14]
300^2 + 500^2 = c^2
9000 + 250000=c^2
340000=c^2
sqrt (340000) = c
c = 583
300 + 500 + 583 = 1383
1380 is the perimeter
8 0
2 years ago
Other questions:
  • Aliza needs to run at a rate faster than 8.8 feet per second in order to exceed her fastest time in a race. After running for 15
    12·1 answer
  • Indicate which of the following situations inferential statistics: a. An annual stockholders' report details the assets of the c
    15·1 answer
  • One side of a right triangle is 2 cm shorter than the hypotenuse and 7 cm longer than the third side. find the lengths of the si
    8·1 answer
  • Multiply.<br> (5x + 3z) (7x-z)<br> Simplify your answer.
    9·1 answer
  • Which value of k makes the equation k\2 =10
    7·1 answer
  • What will it look like
    5·1 answer
  • Jagger has two different sized plastic cups for lemonade. Cup a holds 1/16 gallon. Cup B holds 1/8 gallon. He has 3/4 gallon of
    11·2 answers
  • Select the expression that is equivalent to (x-3)^2
    6·1 answer
  • The grass is the number of gallons of white paint that were mixed with gallons of blue paint and various different ratios the nu
    13·2 answers
  • There are 5 questions listed below. Each question includes:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!