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
sukhopar [10]
4 years ago
15

PLEASE HELP ME WITH THIS PROBLEM IVE BEEN ON IT FOR 3 DAYS NOW!

Mathematics
1 answer:
Len [333]4 years ago
3 0
85 x 3 = 255
 first 2 test grades were 81 and 86:
81 + 86 = 167

Need to find the 3rd to have exact average 85:
255 - 167 = 88

So her 3rd test needs to make 88 to make average of 85

Double check: 81 + 86 + 88 =  255 = 85 + 85 + 85
You might be interested in
Beth wants to buy a radio for $36. She<br> gives the cashier $40. What is her<br> change?
kow [346]
Her change is $4
40-36=4
5 0
3 years ago
Read 2 more answers
What is 888 +999 + 777 +6662<br> O A. 3,003<br> B. 3,030<br> O c. 3,300<br> OD. 3,330<br> E. 3,333
svet-max [94.6K]
None, it’s greater than all of those answers
6 0
3 years ago
-2x+5=31 solve for equation
Yuri [45]

Answer:

Step-by-step explanation:

-2x=31-5

-2x= 26

x=-13

3 0
3 years ago
A circle has center at (7, 0). What is the equation of the line that is tangent to the circle at (2, 0)?
IgorC [24]
First find equation
center is (h,k) then
(x-h)^2+(y-k)^2=r^2
given
(7,0) is center
(x-7)^2+y^2=r^2
also given (2,0)
(2-7)^2+0^2=r^2
(-5)^2=r^2
25=r^2

(x-7)^2+y^2=25 is equation

take derivitive of both sides, implicit differntiaton
2(x-7)+2y dy/dx=0
2(x-7)=-2y dy/dx
(7-x)/y=dy/dx
at (2,0)
(7-2)/0
undefined
that means the line is x=something
(2,0)
the equation is x=2
7 0
4 years ago
A rectangular sheet of metal measures 8 inches by 11 inches. The metal is worth $3.00 per square inch. How much is the sheet of
krek1111 [17]

Answer:

$264.00

Step-by-step explanation:

8x11x3

5 0
3 years ago
Other questions:
  • 12 x Q greater than 12 less than 24
    13·1 answer
  • A student winds a strip of paper eight times round a cylinderical pencil of diameter 7mm. Use the value 22/7 for the to find the
    5·1 answer
  • Show work and explain with formulas if possible.
    13·2 answers
  • 8. Write an equation for the line that is parallel to the given line and that passes through the given point.
    14·2 answers
  • What are the first 3 multiples of 13
    13·2 answers
  • Please help me answer these two! I’m terrible at maths <br> Sorry about the screen it’s on my laptop
    15·1 answer
  • What has ears but can not hear?
    7·2 answers
  • 2x-4y=-20 write it in y=ax+b form
    13·1 answer
  • What is the slope of this line?
    13·1 answer
  • Thirty-three college freshmen were randomly selected for an on-campus survey at their university. The participants' mean GPA was
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!