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scoundrel [369]
3 years ago
14

Simplify the expression 4(q+2)-6

Mathematics
1 answer:
Murrr4er [49]3 years ago
4 0
4q + 8 - 6= 4q + 2=2q + 1
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-6x+5y+2z=-11<br> -2x+y+4z=-9<br> 4x-5y+5z=-4
AlladinOne [14]

Answer:

[4, 3, -1]

Explanation:

When solving systems of equations in three variables, pick two equations to work with first, solve for both variables, plug them into one of the equations you first started on, then in the end, put them altogether:

{-6<em>x</em> + 5<em>y</em> + 2<em>z</em> = -11 ←

{-2<em>x</em> + <em>y</em> + 4<em>z</em> = -9 We can eliminate the<em> </em><em>y-</em><em>values</em><em> </em>obviously

{4<em>x</em> - 5<em>y</em> + 5<em>z</em> = -4 ←

{-6<em>x</em> + 5<em>y</em> + 2<em>z</em> = -11

{4<em>x</em> - 5<em>y</em> + 5<em>z</em> = -4

___________________

-2<em>x</em> + 7<em>z</em> = -15

- 7<em>z</em> -7<em>z</em>

______________

-2<em>x</em> = -15 - 7<em>z</em>

___ ________

-2 -2

<em>x</em> = 7½ + 3½<em>z</em>

-2[7½ + 3½<em>z</em>] + <em>y</em> + 4<em>z</em> = -9

-15 - 7<em>z</em> + <em>y</em> + 4<em>z</em> = -9

-15 - 3<em>z</em> + <em>y</em> = -9

+15 + 15

_______________

-3<em>z</em> + <em>y</em> = 6

+3<em>z</em> + 3<em>z</em>

<em>y</em> = 6 + 3<em>z</em> [Plug in -1 for <em>z</em><em> </em>to give you the y-value of 3; 3 = <em>y</em>; since you now have both <em>z</em><em> </em>and <em>y</em><em> </em>terms, plug in these terms back into all three equations above to get the x-value of 4.]; 4 = <em>x</em> ⤻

-6[7½ + 3½<em>z</em>] + 5[6 + 3<em>z</em>] + 2<em>z</em> = -11

-45 - 21<em>z</em> + 30 + 15<em>z</em> + 2<em>z</em> = -11

-15 - 4<em>z</em> = -11

+15 + 15

_____________

-4<em>z</em> = 4

___ __

-4 -4

<em>z</em> = -1 [Plug this into the equation for <em>y</em>]⤻

I am joyous to assist you anytime.

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Function 1 has a greater y-intercept than function 2

Step-by-step explanation:

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What is the greatest integer value of y for whic 5y - 20 &lt; 0 ?
Kruka [31]

Answer:

3

Step-by-step explanation:

Step 1: Isolate <em>y</em>

5y < 20

y < 4

When we figure out the inequality, we see that <em>y </em>has to be less than 4. Therefore, the highest integer value will have to be 3.

4 0
3 years ago
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