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2 years ago

Evaluate the expression when a=4 and x=-4. -9a + x

Mathematics

1 answer:

svetlana [45]2 years ago

3 0

Answer:

- 40

Step-by-step explanation:

When a = 4, and x = -4:

Evaluating algebraic expressions simply involve substituting the given values for a and x into the expression, -9a + x.

Hence, -9a + x = -9(4) + (-4) = -36 - 4 = -40

Therefore, the correct answer is -40.

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Find the equation of the perpendicular bisector of a line segment whose end points are (-3,9) and (-1,5)

timofeeve [1]

First find the equation of y.

$y=mx+n=\frac{\Delta y}{\Delta x}x+n$

Find the slope m.

$m=\frac{5-9}{-1-3}=\frac{-4}{-4}=1$ .

Pick one point, I'll pick (-3, 9). Insert coordinates in equation then compute n.

$9=1(-3)+n\implies n=12$ .

The equation of a line y is:

$y=x+12$ .

The perpendicular line $y_{\perp}$ is same like the normal line except its slope m becomes:

$k=-\frac{1}{m}=-1$ .

The equation of a perpendicular bisector is thus:

$y_{\perp}=-x+12$ .

Hope this helps.

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3 years ago

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sweet-ann [11.9K]

Answer:

0.0174533

Step-by-step explanation:

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2 years ago

Log x + log (2x-1) = log 6

Brilliant_brown [7]

Answer:

x = 2

Step-by-step explanation:

logx + log(2x - 1) = log 6

Apply log rules,

x(2x - 1) = 6

2x^2 - 1x = 6

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2 years ago

Solve for x: -1/3(4x+2)=1/3(x+11) A. -13/3 B. -3 C. -13/5 D. -9/5

Nataly_w [17]

X=-13/5

Simplify both sides of the equation, isolate the variable, and then you get your answer.

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3 years ago

8-(-5) = What is the answer

shtirl [24]

Answer:

Step-by-step explanation:

8--5 = 8 + 5 = 13

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2 years ago

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