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svetoff [14.1K]
3 years ago
8

Sandra has taken 3 Test this Quarter. She has scored an 78%, 76%, and a 93%. Sandra wants to earn at least and 85% for the Quart

er. What score will she need to earn on her Final Test in order for her to Average at least an 85% for the Quarter? Then Explain what your answer means.
Mathematics
2 answers:
Lady bird [3.3K]3 years ago
8 0
I got 86% as the answer
algol [13]3 years ago
5 0

Answer:

I think at least a 86% hope this helps, hope i am right

Step-by-step explanation:

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2x+4y=12 y=0.25x-3 What is the solution to the system of equations?
ololo11 [35]
{ 2 x + 4 y = 12
   y = 0.25 x -3

Arrange equation variables of elimination :

{ 2 x + 4 y = 12
 -0.25 x  + y = - 3

Multiply  ( -0.25 x +y = - 3 )  by 8 :

8y - 2 x =  - 24 

{ 2 x + 4y = 12
  -2x + 8y  = -24
----------------------
        12 y = -12

y = - 12 / 12

y = - 1

For x :

2 x  + 4y = 12

2 x + 4 ( - 1 ) = 12

2 x - 4 = 12

2 x = 12 + 4

2 x =  16

x = 16 / 2

x = 8

x = 8 and y = - 1  =>  ( 8 , - 1 )

Answer b

hope this helps!


7 0
3 years ago
Rewrite 4 6/7 as an improper fraction.<br><br> sorry this is the correct question
goblinko [34]
The correct answer is, obviously, 34/7.
8 0
3 years ago
Read 2 more answers
What is the slope of the line with the equation of y= 3x that passes through the points (2, 6)?
SashulF [63]

Answer:

is there a picture?

Step-by-step explanation:

5 0
2 years ago
What is the scientific notation for 140000
vampirchik [111]
You move the decimal point forward until it reaches the one so it looks like this:

1.4 x 10⁵ 

the exponent, 5, just tells you how many spaces the decimal point moved.
6 0
3 years ago
What is the side length of a cube with volume 343 in squared?
Thepotemich [5.8K]
Hi there!

The formula for a square is V = s^3. Using this formula, we can plug in the volume and solve for s.

WORK:
343 = s^3
s = 7

ANSWER:
The side length of a cube with volume 343 is 7 inches.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
6 0
3 years ago
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