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kolezko [41]
3 years ago
10

Ted needs an average of at least 70 on his three history tests. He has already scored 85 and 60 on two tests. What is the minimu

m grade Ted needs on his third test?
Mathematics
1 answer:
baherus [9]3 years ago
3 0
He must get a 65 as a minimum grade on his third test to get an average of 70.
Equation is
                       85 + 60 + x
                     ------------------- greater than or equal to 70
                              3
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Alex

Answer:

(x-8)(x+8)

Step-by-step explanation:

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2 years ago
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Determine the number of solutions the system of 1/3y-5=2x and y=3(2x+5)
lorasvet [3.4K]

Answer:

A. (4,1)

Step-by-step explanation:

2x -5y = 3

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Change the equation to isolate a variable so you can substitute it in the other one.

x = 1+3y so

2(1+3y) -5y = 3

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Back to the easy equation we isolated

x = 1+3(1)

x= 4

(4,1) is a point where x=4 and y=1

hendikeps2 and 22 more users found this answer helpful

THANKS

13

5.0

(9 votes)

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