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Gre4nikov [31]
2 years ago
11

G) (12d + 3) +-14d what's the answer​

Mathematics
1 answer:
Lena [83]2 years ago
6 0

Answer: -2d+3

Step-by-step explanation:

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Solve the system using elimination.
KIM [24]
We can't eliminate as is so we have to change something up there in the equations to get either the x values the same number but opposite signs, or the y values the same number but opposite signs.  I chose to change the y values to the same number but different signs. In the first equation y is -3y and in the second one, y is -8y. The LCM of both of those numbers is 24, so we will multiply the first equation by an 8 (8*3=24) and the second equation by 3 (3*8=24) but since they are both negative right now, one of those multiplications has to involve a negative because - * - = +. Set it up like this:
8(-10x - 3y = -18)
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Multiply both of those all the way through to get new equations:
-80x - 24y = -144
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Now the y's cancel each other out leaving only the x's:
-59x = -177 and x = 3.  Now plug that 3 into either one of the original equations to find the y value.  Either equation will work; you'll get the same answer using either one. Promise. -7(3) - 8y = 11 gives a y value of -4.  so your solution is (3, -4) or B above.
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The answer is 7.3. Hope that helps.

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3. For the equation-4y = &amp;r, what is the constant of variation? (1 point)<br> ООО<br> 02
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Answer:

3).

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y \alpha x \\ y = kx \\ where \: k \: is \: the \: constant \: of \: proportionality \\ when \: y = 24 \: and \: x = 8 \\ substitute \: in \: y = kx \\ 24 = 8k \\ k =  \frac{24}{8}  \\ k = 3 \\ value \: of \: constant = 3

If it was by 10, k = 3 by 10

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general \: equation \: of \: line  \\ y = mx + c \\ but \: m =  \frac{2}{3}  \: and \: c = 9 \\ substitute \: for \: m \: and \: c \: in \: y = mx + c \\ y =  \frac{2}{3} x + 9 \\ alternatively \\ 3y = 2x + 27

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3 years ago
On average, Gil reads 57 pages in a book each week.<br> How many pages des Gil read in 12 weeks?
Triss [41]

Answer:

684

Step-by-step explanation:

57 times 12

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