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2 years ago

Evaluate the expression when a = -6 and c=7. C-8a

Mathematics

1 answer:

daser333 [38]2 years ago

3 0

Answer:

Step-by-step explanation:

Given the following question:

$c-8a$
$c=7$
$a=-6$

Substitute and solve by using PEMDAS:

$c-8a$
$7-8(-6)$
$8\times-6=-48$
$7--48$
$7--48=55$
$=55$

Your answer is "55."

Hope this helps.

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According to a report, 67.5% of murders are committed with a firearm. (a) If 200 murders are randomly selected, how many wou

kolezko [41]

Answer: The answer is 135 murders.

Step-by-step explanation: The report tells us that statistically 67.5% of murders are committed using a firearm. It follows therefore that in a sample of 200 randomly selected murders, one would expect that 67.5% of those would be by a firearm. $\frac{67.5}{100}$ * 200 = 135.

It would certainly be higher that the expected value based on previous data collected but it would not be unusual because one sample may have a higher than "normal" amount of murders by firearm. Statistics aren't going to be exact for every sample.

8 0

3 years ago

Plz help it due in a hour <br> And show workings

Lesechka [4]

Answer:
(8,6)

Explanation:
The middle of the 2 x coordinates, 8 and -2 is 3. The middle of the 2 y coordinates, -6 and 6 is 0. Hence (8,6)

3 0

3 years ago

what is the difference in height between an albatross flying at 100 m above the surface of the ocean and a shark swims 30 m belo

WITCHER [35]

Answer:

130 meters

Step-by-step explanation:

We have to let the "surface of the ocea" be at 0 height.

So,

anything above surface has POSITIVE height

and anything below surface has NEGATIVE height

The albatross is 100 m above, so we can say its height is:

+100 meters

The shark is 30 m below, so we can say its height is:

-30 meters

The difference in height is thus:

100 - (-30) = 100 + 30 = 130 meters

3 0

3 years ago

I'm having a bit of a problem with this piecewise function I will upload a photo

kipiarov [429]

Given the piecewise function:

$f(x)=\begin{cases}-0.5x-4,x\le-2 \\ 5,-24\end{cases}$

So, for the given function, we will graph it as follows:

1) graph the line (-0.5x-4) as x less than or equal to -2

To graph the line, we need two points

We will substitute with two values less than -2 and calculate the corresponding values of f(x)

When x = -4, f(x) = -0.5 * -4 - 4 = -2

When x = -6, f(x) = -0.5 * -6 - 4 = -1

So, the line will pass through the points ( -4, -2) and ( -6, -1)

The line will start from the point ( -2, -3)

The dot at x = -2 will be closed.

2) Graph the line (y = 5) as x between -2 and 4

The line will be horizontal at this interval

the dot at x = -2 will be open

The dot at x = 4 will be closed

3) Graph the line ( -x + 5 ) as x greater than 4

As in (1), substitute with 2 values of x greater than 4

When x = 5, f(x) = -5 + 5 = 0

When x = 6, f(x) = -6 + 5 = -1

So, the line will pass through the points ( 5, 0 ) and ( 6, -1 )

The graph of the function will be as shown in the following picture:

8 0

1 year ago

-5 + blank = -7 1/3

lakkis [162]

- 5 + -2 1/3 = -7 1/3
Have a great day

5 0

3 years ago