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lorasvet [3.4K]
3 years ago
5

Jeff's math grade is based on two quizzes, two tests, and one project. The table shows Jeff’s scores on these items, as well as

each item’s weight in determining his final grade. To determine his final grade, Jeff’s teacher multiplies each score by its weight, adds the products together, and then divides the sum by 10. What is Jeff’s final grade?
Mathematics
2 answers:
vazorg [7]3 years ago
6 0

Answer:

Step-by-step explanation:

If you can post the table then I'lI be happy to help

galina1969 [7]3 years ago
5 0

Answer:

Step-by-step explanation:

quiz 1

quiz 2

test 1

test 2

project

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If f(x) = x2 − 81 and g(x) = x+9/x-9, find g(x) · f(x).
dexar [7]

Answer:

f(x) = x² - 81 = ( x+ 9)(x - 9) Difference of two squares

g(x) = x+9/x-9

g(x) . f(x) = x + 9/ x - 9 × (x+9)(x - 9)

= ( x + 9)(x +9)

= ( x + 9)²

= x² + 18x + 81

Hope this helps.

3 0
3 years ago
Elimination_4x_2y=14<br> _10x+7y=_24
Gnesinka [82]

Answer:

The answer is x=-\frac{50}{8}  and y=\frac{11}{2}.

Step-by-step explanation:

Given:

-4x-2y=14

-10x+7y=-24

Now, to solve it by elimination:

-4x-2y=14   ......(1)

-10x+7y=-24 ......(2)

So, we multiply the equation (1) by 7 we get:

-28x-14y=98

And, we multiply the equation (2) by 2 we get:

-20x+14y=-48

Now, adding both the new equations:

-28x-14y+(-20x+14y)=98+(-48)

-28x-14y-20x+14y=98-48

-28x-20x-14y+14y=50

-8x=50

<em>Dividing both the sides by -8 we get:</em>

x=-\frac{50}{8}

Now, putting the value of x in equation (1):

-4x-2y=14

-4(-\frac{50}{8})-2y=14

\frac{200}{8} -2y=14

25-2y=14

<em>Subtracting both sides by 25 we get:</em>

-2y=-11

<em>Dividing both sides by -2 we get:</em>

y=\frac{11}{2}

Therefore, the answer is x=-\frac{50}{8}  and y=\frac{11}{2}.

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-20+8x

Step-by-step explanation:

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Answer:

<h3>10 all write hahahahahahahaha</h3>
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julsineya [31]

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