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3 years ago

I need help with this it is confusing

Mathematics

1 answer:

Gnoma [55]3 years ago

6 0

Answer:

Step-by-step explanation:

First let's assume that this is a linear relationship. Find the slope, if there is a unique slope. As we move from the point (-2, -2) to the point (2, 8), x increases by 4 and y increases by 10, so that the slope is m = rise / run, or

m = 10 / 4, or 2.5. Using the point (2, 8), determine the y-intercept:

8 = 2.5(2) + b, or 8 = 5 + b, so that b = 3.

Then y = 2.5x + 3. Now test whether another point, such as (6, 18), satisfies this equation:

18 = 2.5(6) + 3, or

18 = 15 + 3 This is true.

So we can conclude that this is a linear relationship, y = 2.5x + 3 (Answer A)

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A rectangle has a width of 10cm. The rectangle length is 4 times its width

Nana76 [90]

Answer:

P = 100 centimeters (assuming you are asking for the perimeter)

Step-by-step explanation:

P = 2 (L + W) OR P = 2L + 2W where P equals the perimeter, L equals the length, and W equals the width.

Since the rectangle's length is 4 times its width and given we know the width is 10 centimeters, then the length is 40 centimeters. Now we can substitute these values in our formula, okay?

P = 2 (L + W)

P = 2 (40 + 10)

P = 80 + 20

P = 100 centimeters

8 0

3 years ago

This is my last question please help !

chubhunter [2.5K]

Answer:

try the third option

Step-by-step explanation:

At least I'm trying

8 0

2 years ago

Please help me . . . . . .

NNADVOKAT [17]

Answer:

Step-by-step explanation:

The figure is a parallelogram. That means the y value of g is the same as the y value of H

G( ? , b)

The x value of G is a little harder. You have to be careful what you do to c.

A is at - c which means you need to add c to get to (0,0)

In addition, you go out d units to get to F. So the x value of G = c + d

the complete answer is G(c + d,b)

3 0

2 years ago

What is the gradient of the line (-4, 10) to (-2, 6)

Andre45 [30]

Answer:

（2,-4）

Step-by-step explanation:

-4＋2＝-2

10＋-4＝10-4＝6

6 0

2 years ago

A survey reveals that the sales of smartphones is increasing considerably. The average annual sales of smartphones, in million u

padilas [110]

Answer:

C. When the survey was initially conducted average sales of smartphones was 1.7 millions units.

Step-by-step explanation:

We have been given that the average annual sales of smartphones, in million units, n years after the survey is conducted is modeled by function $p(n)=1.7\cdot b^n$ , where the parameter b is an unknown positive base.

We are asked to find the true statement about our given function.

A. If b= 1.45, the annual growth rate of the sales of smartphones is 145%.

Since we know that b equals (1+r) for growth function, where r is in decimal form.

If b=1.45, it means that the annual growth rate will be 45% as 0.45 is decimal form of 45%, therefore, statement A is not true.

B. If b= 1.02, annual sales of smartphones will double in 2 years.

If b=1.02, it means that the annual growth rate will be 2% as 0.02 is decimal form of 2%, therefore, statement B is not true.

C. When the survey was initially conducted average sales of smartphones was 1.7 millions units.

Since we know that an exponential function is in form $y=a*b^x$ , where a in initial value of function. We can see from our given function that a equals 1.7, therefore option C is a true statement.

D. The average sales of smartphones increases by 1.7 millions units every year.

Since our function is not a linear function, instead it is an exponential function, so rate of change can not be constant.

Therefore, option D is not true regarding our given function.

7 0

3 years ago