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kobusy [5.1K]
3 years ago
8

Simplify the expression –4(x – 7) + 3(x + 9). Show All Your Work

Mathematics
2 answers:
dolphi86 [110]3 years ago
6 0
-4 times x is=-4x
-4 times -7 is=28
3 times x is = 3x
3 times 9 is = 27 
-4x+28+3x+27
it needs to be simplified so ur answer is 
-1x+55 
I think
asambeis [7]3 years ago
5 0
First distribute the -4 and 3, then combine like terms

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Step-by-step explanation:

If graphing is the task, you should rewrite the equation in a y = ax + b form. All straight lines can be described in this form, only the a and b determine which line it is.

Your equation 5x-y=7 has the 5x on the left side, so lets move it to the right. It will get a negative sign (this is the same as subtracting 5x like you did in your picture)

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Now the equation is in its "normal" form. It's like the y = ax + b with a and b chosen as a=5 and b=-7.

The normal form is handy because you can immediately see the slope is 5 and the intersection with the y-axis is at y=-7.

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