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3 years ago

Evaluate the polynomial 6x - y, for x = - 3 and y = 2.

Mathematics

2 answers:

Ivahew [28]3 years ago

5 0

Answer:

Do the order of operations after you plug everything in. If that doesn't help do a proof.

6x-y turns into 6(-3)-2. Do parenthesis () first, (-18)-2. You will get the finally answer of -20.

professor190 [17]3 years ago

3 0

Answer:

Step-by-step explanation:

6x - y

Put the values of x = -3 and y = 2 to the expression:

6(-3) - 2 = -18 - 2 = -20

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I’m confused on this answer anyone know it?

slamgirl [31]

Answer:

$y=\frac{26}{7},\:x=-\frac{15}{7}$

Step-by-step explanation:

$\begin{bmatrix}4x+5y=10\\ -2x+y=8\end{bmatrix}\\\\\begin{bmatrix}-2\cdot \frac{10-5y}{4}+y=8\end{bmatrix}\\\\$

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$\mathrm{For\:}x=\frac{10-5y}{4}\\\mathrm{Subsititute\:}y=\frac{26}{7}\\x=\frac{10-5\cdot \frac{26}{7}}{4}\\\\$

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