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3 years ago

PLEASE HELP ME OUT ONLY IF YOU KNOW THE ANSWER!! THANKS SO MUCH!!

Mathematics

1 answer:

Alexxx [7]3 years ago

8 0

Answer:

T(-4) = -(-4)-2 = 2

Step-by-step explanation:

If you have -4 as the x value, all you have to do is substitute -4 in for x in the equation you are given, so it would be -(-4)-2. Now, you have a negative outside of your parenthesis -4, so that will have to be distributed to the -4, and it becomes positive 4. That will then make the equation 4-2, which then makes 2 your overall answer.

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Which of the following is equivalent to | − 12 + 3 | ?

melisa1 [442]

Answer:

Step-by-step explanation:

The answer to | − 12 + 3 | is 9 because if you add -12 + 3, you get -9. However, since it is the <em>absolute value</em>, we would make it the same number but positive.

Hope this helped! :)

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3 years ago

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How many points determine a unique line?

Nesterboy [21]

B. 2 Points determine a unique line

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3 years ago

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the chumas family is driving from north carolina to california on vacation. They drive 330 in 5.5 hours How many hours would it

spin [16.1K]

An easy way is to work out their speed. Speed = distance/time.

First part: Speed = 330/5.5 = 60 mph

Finally, the second part: time = distance / speed

So time = 720/60 = 12 hours

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3 years ago

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HELPPPP<br><br> If y=4, 3y+6=7(2y-3)

Step2247 [10]

Answer:

i think your question is missing something??

Step-by-step explanation:

3(4) + 6 = 7 (2(4)-3)

12 + 6 = 7 (8-3)

18 = 7 (5)

18 = 35?

8 0

3 years ago

Sandra normally takes 2 hours to drive from her house to her grandparents' house driving her usual speed. However, on one partic

Rudiy27

Answer:

Her usual driving speed is 38 miles per hour.

Step-by-step explanation:

We know that:

$s = \frac{d}{t}$

In which s is the speed, in miles per hour, d is the distance, in miles, and t is the time, in hours.

We have that:

At speed s, she takes two hours to drive. So

$s = \frac{d}{2}$

$d = 2s$

However, on one particular trip, after 40% of the drive, she had to reduce her speed by 30 miles per hour, driving at this slower speed for the rest of the trip. This particular trip took her 228 minutes.

228 minutes is 3.8 hours. So

$0.4s + 0.6(s - 30) = \frac{d}{3.8}$

$3.8(0.4s + 0.6s - 18) = d$

$3.8s - 68.4 = 2s$

$1.8s = 68.4$

$s = 38$

Her usual driving speed is 38 miles per hour.

3 0

3 years ago