You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Algebra 2 m/c questions...check work
- Thread starter Samara
- Start date
Hello, Samara!
In the first set, your first two solutions are absolutely correct . . . Nice work!
\(\displaystyle \begin{array}{cccc}\text{Multiply [1] by 4:} & 20x + 24y & = & -36 \\ \text{Multiply [2] by 3:} & -3x - 24y & = & -15 \\ \\ \text{Add:} & 17x &=& -51 \end{array}\)
\(\displaystyle \text{Therefore: }\;\boxed{x \:=\:-3}\)
In the first set, your first two solutions are absolutely correct . . . Nice work!
6. Which x-value satisfies the system below?
. . . . . \(\displaystyle \begin{array}{cccc}5x + 6y & = & -9 & [1]\\ -x - 8y &=& -5 & [2] \end{array}\)
\(\displaystyle a)\;\;3\qquad b)\;\;-3\qquad c)\;\;1\qquad d)\;\;-1\)
\(\displaystyle \begin{array}{cccc}\text{Multiply [1] by 4:} & 20x + 24y & = & -36 \\ \text{Multiply [2] by 3:} & -3x - 24y & = & -15 \\ \\ \text{Add:} & 17x &=& -51 \end{array}\)
\(\displaystyle \text{Therefore: }\;\boxed{x \:=\:-3}\)
Thank you very much! I think I remember doing this now...where did the multiply by 4 and 3 come from?...On the second page, the first few I did not understand (well, I think number 1 is two real roots, but I am unsure)
I think that 2 is C, I just used Quadjm on my calculator
I don't think I quite understand number 3, however
I think that 2 is C, I just used Quadjm on my calculator
I don't think I quite understand number 3, however