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sergiy2304 [10]
3 years ago
10

Jean's scores on the first three of four 100-point tests were 82, 86, and 91. what score must she receive on the fourth test to

have an average of at least 87 points for all the tests
Mathematics
1 answer:
monitta3 years ago
5 0

The total for an average to be 87 would have be 87 x the number of tests or 87 x 4 = 348.

Let's see the total for her previous 3: 82 + 86 + 91 = 259

The 4th one needs to take her from 259 to 348.

348 - 259 = 89. she has 89 'to go" to get that 87 average.

She requires an 89 to achieve an 87 test average.

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0.5y/4/9=y+3/8
PIT_PIT [208]

Step-by-step explanation:

The question needs to be more specific. But assuming it is 0.5y/(4/9), I will solve it.

This would make it 4.5y/4 =y + 3/8

- Multiply 4 to both sides

4.5y = 4y + 12/8

- Subtract 4y to both sides

0.5y = 12/8

- Divide both sides by 0.5

y = 3

Now plug in to check.

0.5(3)/(4/9)=3+3/8

Both equals 3.375!

If this helped, please feel free to pick this answer as the brainliest! Thank you very much and have a wonderful day!

8 0
3 years ago
A rectangle is enlarged by a factor of 6.<br> What is the area of the enlarged rectangle.
guajiro [1.7K]

Answer:

A. 120 in.

Step-by-step explanation:

Just multiply the two numbers.

7 0
3 years ago
Pls help I'm bad at math v.v<br><br> Lines m and n are parallel.
Eva8 [605]

Answer:

The measure of angle 1 is 55.

Step-by-step explanation:

The top angle= 75 because of the vertical angle theorem

The right angle= 50 because of the alternate exterior angle theorem

75+50=125

There are 180 degrees in a triangle so the angle has to equal 55

5 0
3 years ago
Which graph represents the function of f(x) = 9x 2 -36/3x+6 Please help
UkoKoshka [18]
The function is:

             (9x^2 - 36)
f(x) = ---------------------
                3x + 6

You can simplify that function to a linear function for all x for which 3x + 6 ≠ 0

=> x ≠ - 2.

So, for x ≠ - 2, you can do:


             (9x^2 - 36)
f(x) = --------------------- =
               3x + 6

              9(x^2 - 4)
f(x) = ---------------------
                3(x + 2)

             3(x + 2)(x - 2)
f(x) = --------------------- = 3(x - 2) = 3x - 6
                 (x + 2)

So, the graph is a right line that intercepts the y-axis at - 6 and the x-axis at x = 2, excluding x = -2 as the function is not defined for x = -2. That is the second graph of the second picture.


6 0
3 years ago
10x - 9y + 5x - 4y - 5x + 4x
Vadim26 [7]

Answer:

16x-5y

Step-by-step explanation:

5 0
3 years ago
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