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
The area of a circle, in terms of π, is 196π m2.<br> Find the value of the radius.
AleksandrR [38]

Step-by-step explanation:

if area of circle = pi times radius^2,

area of circle divided by pi = radius^2

so, square root (area of circle divided by 2) = radius.

so, 196pi = m2

approx 616

616=m2

sqrt 616 =m

approx value of radius is 25 or 24.8

pls mark this as brainliestttt

5 0
2 years ago
Factor −5x2 + 10x.<br><br> −5x(x + 2)<br> 5(−x2 + 10x)<br> 5x(−x + 2)<br> x(5x + 10)
Hitman42 [59]

{ \red{ \bold{option \: (c)}}}

Step-by-step explanation:

{ \purple{ \tt{ { - 5x}^{2}  + 10x}}}

Take { \purple{ \tt{5x}}}as common. Then,

{ \purple{ \tt{5x( - x + 2)}}}

4 0
1 year ago
25/4=x/10 <br>please help thanks
Marta_Voda [28]

Answer:

125/2 or 62.5 or 62 1/2 (x=)

Step-by-step explanation:

25/4=x/10  multiply everything by 20

25*20/4=20x/10 simplify

25*5=2x simplify

125=2x divide on both sides

125/2 or 62.5 or 62 1/2=x

7 0
3 years ago
What is the equation of the line that passes through points (15,9) and (-2,9)
Vikki [24]

Answer:

y=9

Step-by-step explanation:

Slope: 9-9/-2-15=0

Therefore, y=0x+b

Plug values in: 9=0(-2)+b

0+b=9

b=9

Therefore, equation is y=9

7 0
3 years ago
Describe two different ways you could change the values in the table so that the answer to problem 6 is different.
ladessa [460]

Answer:

Um theres no question or picture. Or document.

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the value of the sample correlation coefficient. Based on this value, how would you describe the nature of the relatio
    8·1 answer
  • What is the image of
    14·1 answer
  • Chapter 3 solving equations
    14·1 answer
  • 7 break into 9 how many times​
    7·2 answers
  • The radioactive isotope 14C has a half-life of approximately 5715 years. A piece of ancient charcoal contains only 75% as much o
    12·1 answer
  • Steve increases his math average by nine points over a period of 15 weeks how many points did he per week did his average increa
    15·2 answers
  • Apply the distributive property to factor out the greatest common factor.<br>55+35​
    11·1 answer
  • hat is the rectilinear distance between​ (−3, −6) and​ (14, −2)? A. 3 B. 21 C. 25 D. 18.79 E. 7 F. 15
    14·1 answer
  • My smart friends couldn't even figure this out.
    12·2 answers
  • Marissa's hair was 10 inches long and then she cut w inches
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!