3 years ago

4x+ 3y -2z=35, 2x-3y+z=-6, x+2y+3z=-5, solve for x,y and z

1 answer:

Mkey [24]3 years ago

3 0

1. X = \frac{35}{4}+\frac{\left( -3\right) \ Y}{4}+\frac{z}{2}$$

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AveGali [126]

The answer is b if you add 3 plus -5 that would have given you negative -2

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3 years ago

lutik1710 [3]

Option a: $(-0.5,-1.75)$ is the solution to the system of equations.

Explanation:

The equations are $y=-\frac{2}{5} x-2$ and $y=5 x+1$

Equating these two equations, we have,

$-\frac{2}{5} x-2=5 x+1$

Taking LCM and multiplying both sides by 5, we get,

$-2 x-10=25 x+5$

Simplifying , we get,

$\begin{aligned}-10-5 &=25 x+2 \\-15 &=27 x \\-\frac{15}{27} &=x \\-\frac{5}{9} &=x\end{aligned}$

Substituting the value of x in $y=5 x+1$ , we get,

$\begin{aligned}&y=5\left(-\frac{5}{9}\right)+1\\&y=-\frac{25}{9}+1\\&y=-\frac{16}{9}\end{aligned}$

Thus, the solution is $\left(-\frac{5}{9},-\frac{16}{9}\right)$

Changing the solution from fraction to decimal, we get, $(-0.556,-1.778)$

Thus, the solution is $(-0.5,-1.75)$

Hence, option a is the correct answer.

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3 years ago

Rina8888 [55]

$6x(x+4)=0 \\
6x=0 \ \lor \ x+4=0 \\
x=0 \ \lor \ x=-4 \\
\boxed{x=0 \hbox{ or } x=-4}$

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3 years ago

cluponka [151]

Answer:

Right, obtuse, and isosceles. (B, D, E)

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4 years ago

shtirl [24]

Hello! i’m in algebra 2 and passed algebra 1 with a 97%. any chance i might be able to help you? i don’t want money for it tho

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