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2 years ago

Evaluate the expression when a=3 and b=-6. -a +6b

Mathematics

2 answers:

Tcecarenko [31]2 years ago

5 0

Answer:

Step-by-step explanation:

-a + 6b = -3 + 6 * (-6) = -3 - 36 = -39

Fynjy0 [20]2 years ago

4 0

Substitute the values in:

-a + 6b

-(3) + 6(-6)

-3 + (-36)

= -39

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Ms. Scarborough solved x^2+6x-7 by completing the square in the table below. Identify the missing steps.

dybincka [34]

Answer 1: Move the -7 over to the right side of the problem.
Answer 2: $x^2 + 6x + 9 = 7+9$
Answer 3: $(x+3)^2 = 16$
Answer 4: Use the square root for both sides of the equation.
Answer 5: x = -3 <span>± 4 = 1, -7 --> x = 1, -7</span>

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2 years ago

Find the equation of a line that satisfies the given conditions; x-intercept = 2, and y-intercept = -8

Jlenok [28]

X-intercept = (2 , 0)
y-intercept = (0 , -8)
Slope of the line:
m = (-8 - 0) / (0 - 2)
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3 years ago

In radian measure, the angles of a 45-45-90 triangle are:

jeka94

Answer:

The answer is the option A $\frac{\pi}{4},\frac{\pi}{4},\frac{\pi}{2}$

Step-by-step explanation:

we know that

The measure of $\pi$ radians is equal to $180\°$

so by proportion

Find the measure in radians of $45\°$

$\frac{\pi}{180}\frac{radians}{degrees}=\frac{x}{45}\frac{radians}{degrees}\\ \\x=(45/180)*\pi \\ \\x=\frac{\pi}{4}$

Find the measure in radians of $90\°$

$\frac{\pi}{180}\frac{radians}{degrees}=\frac{x}{90}\frac{radians}{degrees}\\ \\x=(90/180)*\pi \\ \\x=\frac{\pi}{2}$

therefore

In radian measure the angles are

$\frac{\pi}{4},\frac{\pi}{4},\frac{\pi}{2}$

8 0

2 years ago

Read 2 more answers

A 25 foot ladder is leaning against a house. It makes a 75 degree angle with the ground. How far is the base of the ladder from

Oduvanchick [21]

Look at the picture.

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25 \cos 75^\circ = x \\
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The base of the ladder is 6.47 feet from the house.

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3 years ago

X-1.6=2.4+0.8x solve for x. <br><br>What did I do wrong?

trapecia [35]

$\bf x-1.6=2.4+0.8x\implies \stackrel{\textit{subtracting 2.4}}{x-4=0.8x}\implies \stackrel{\textit{subtracting x}}{-4=0.8x-x} \\\\\\ -4=-0.2x\implies \cfrac{-4}{-0.2}=x\implies 20=x$

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3 years ago