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4 years ago

Plssssss help meee with this questionnnn I have been stuck on it for foreverrrr

Mathematics

1 answer:

Juliette [100K]4 years ago

7 0

The rate of change is the slope.

That equation is (practically) in the form of y=mx+b because T(d) is very similar to y.

T(d) = 39.27d+36.77

y = mx+b

In this case, d would equal x. T(d) would equal y. 36.77 would equal b.

m is the slope, or the rate of change.

The rate of change is the variable, d, or the answer choice, a: the number of drinks purchased.

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If x = -7, evaluate the following expression: (x − 2)(x+14) ——————- x(x + 8)

azamat

Answer:

Step-by-step explanation:

$\text{Given that}~ x = -7\\\\\dfrac{(x-2)(x+14)}{x(x+8)}\\\\\\=\dfrac{(-7-2)(-7+14)}{-7(-7+8)}\\\\\\=\dfrac{(-9)(7)}{-7(1)}\\\\\\=\dfrac{-63}{-7}\\\\\\=9$

3 0

2 years ago

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Misha Larkins [42]

Answer:

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Step-by-step explanation:

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3 years ago

How to figure out 168=-8x

S_A_V [24]

168=-8x
-8 -x
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Division, 168 divided by -8

4 0

3 years ago

Question: when you subtract like terms how do you know what number to subtract from the other?

lorasvet [3.4K]

Answer: You would add them together, not subtract.

Step-by-step explanation: When you’re combining like terms, you always “add“ them together. For that example, you would add 3x and 10x together along with 4 and -9 together. That would look like (3x + 10x) + [4 + (-9)], which simplifies to 13x - 5 = 180.

7 0

3 years ago

Dave walked to his friend's house at a rate of 4 mph and returned back biking at a rate of 10 mph. If it took him 18 minutes lon

Nadusha1986 [10]

Answer:

The total distance of the round trip was 4 miles

Step-by-step explanation:

1. Let's check all the information given to answer the question correctly:

Speed of Dave walking to his friend's house = 4 mph

Speed of Dave biking from his friend's house = 10 mph

Time walking is 18 minutes longer than time biking

2. What was the total distance of the round trip?

Time walking = x

Time biking = x - 18

For solving x, we will use the following equation:

4x = 10 * (x - 18)

4x = 10x - 180

-6x = - 180

x = -180/-6 (Dividing by - 6)

x = 30

Dave walked 30 minutes and biked 12 minutes, now we can calculate the total distance, this way:

30 minutes = 0.5 hours and 12 minutes = 0.2 hours

Total distance = 4 * 0.5 + 10 * 0.2

Total distance = 2 + 2

Total distance = 4 miles

5 0

3 years ago