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Leto [7]
3 years ago
10

PLEASE HELP WITH PRE CALC

Mathematics
1 answer:
Oksanka [162]3 years ago
5 0

Answer:

-3/2

Step-by-step explanation:

The average rate of change is synonymous to the slope.

So, to find the average rate of change from the interval x=-2 to x=2, first find the y-values at x=-2 and x=2.

At x=-2, we can see that y is 4. Thus, we have (-2,4).

At x=2, we can see that y is -2. Thus, we have (2,-2).

Now, use the slope formula. The formula for slope is:

m=\frac{y_2-y_1}{x_2-x_1}

Let (-2,4) be x₁ and y₁ and let (2,-2) be x₂ and y₂. Therefore:

m=\frac{-2-4}{2--2}

Simplify:

m=\frac{-6}{4}

Reduce:

m=-3/2

So, our average rate of change from the interval x=-2 to x=2 is -3/2.

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CAN ANYONE HELP ANSWER THIS
bija089 [108]

9514 1404 393

Answer:

  58

Step-by-step explanation:

The marked points on the graph show that the number of hot cocoas sold decreases by 6 when the temperature goes up by 6 degrees. That is, the line has a slope of -1. The y-intercept is 100, so the equation of the line can be written as ...

  y = mx +b . . . . . line with slope m and y-intercept b

  y = -x +100

Then for x = 42, the expected value of y is ...

  y = -42 +100 = 58

Mei Mei can expect to sell 58 hot cocoas on a day when the high is 42°F.

5 0
2 years ago
Devaughn's age is two times Sydney's age. The sum of their ages is 18. What is Sydney's age?
emmainna [20.7K]

Answer:

Sydney's Age is 6

Step-by-step explanation:

6 x 2 = 12

12 + 6 = 18

8 0
2 years ago
Read 2 more answers
Evaluate the expressions 12(8-5)
saveliy_v [14]

Answer:

36

Step-by-step explanation:

First you would solve what's in the parenthesis because the Order of Pemdas.

Second you would multiply the answer of what's in the parenthesis which is 3 to 12.

Third you would get the answer which is 36!

8 0
3 years ago
Read 2 more answers
70 students choose to attend one of three after school activities: football, tennis or running. There are 30 boys. 13 students c
sweet [91]

Answer:

13/35

Step-by-step explanation:

13 students choose football.

31 students choose tennis.

this leaves 26 students that chose running.

probability of choosing running is 26/70 = 13/35

4 0
3 years ago
Whats the area and perimeter to the shape below?
Anarel [89]

Answer:

Step-by-step explanation:

a) Area of white square = side *side = 8 * 8 = 64 sq.mm

Area of 4 white square = 4 * 64 = 256 sq.mm

 compound shape

length = 3 cm = 30 mm

Width = 2 cm = 20 mm

Area of compound shape = length *width = 30 * 20 = 600 sq.mm

Area of the shaded part of the compound shape =

                        Area of compound shape - Area of 4 white square

= 600 - 256

= 344 sq.mm

b) Perimeter of compound shape = 2*(length + width)

     = 2*(30 +20)

      = 2* 50

      = 100 mm

6 0
3 years ago
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