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2 years ago

Given f(x) = -2x– 9x + 7, what is the value of f(-3)?

Mathematics

2 answers:

RSB [31]2 years ago

6 0

Answer:

Step-by-step explanation:

Y =

y=−2x−9x+7

Y = −11x+7

_________________________

X =

Let's solve for x.

y=−2x−9x+7

−11x+7=y

−11x+7+−7=y+−7

−11x=y−7

-11x/11 = y-7/-11

X = -11x/11 = y-7/-11

Kamila [148]2 years ago

3 0

Answer:

f(- 3) = 40

Step-by-step explanation:

To evaluate f(- 3), substitute x = - 3 into f(x), that is

f(- 3) = - 2(- 3) - 9(- 3) + 7 = 6 + 27 + 7 = 40

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Step-by-step explanation:

From the question, we are informed that there were 600 performers in a dance recital and that the ratio of men to women is 4:6.

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3 years ago

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Maria and Nate graphed lines on a coordinate plane. Maria's line is represented by the equation y = -5/6x +8. Nate's line is per

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Answer:

c) 6x - 5y = 15

Step-by-step explanation:

Slope-intercept form of a linear equation: $y=mx+b$

(where m is the slope and b is the y-intercept)

Maria's line: $y=-\dfrac{5}{6}x+8$

Therefore, the slope of Maria's line is $-\frac{5}{6}$

If two lines are perpendicular to each other, the product of their slopes will be -1.

Therefore, the slope of Nate's line (m) is:

$\begin{aligned}\implies m \times -\dfrac{5}{6} &=-1\\m & =\dfrac{6}{5}\end{aligned}$

Therefore, the linear equation of Nate's line is:

$y=\dfrac{6}{5}x+b\quad\textsf{(where b is some constant)}$

Rearranging this to standard form:

$\implies y=\dfrac{6}{5}x+b$

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$\implies 6x-5y=-5b$

Therefore, <u>option c</u> could be an equation for Nate's line.

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