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gladu [14]
3 years ago
5

I really need help on this plz help me....​

Mathematics
1 answer:
Daniel [21]3 years ago
4 0

Answer:

The correct answer is -12

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A line goes through the points (8,9) and (-2,4).
Softa [21]
Part A:

Slope of line is given by vertical distance ÷ horizontal distance

Let (8, 9) be (x₁, y₂) and (-2, 4) be (x₂, y₂)
The vertical distance is y₂ - y₁ = 4 - 9 = -5
The horizontal distance is x₂ - x₁ = -2 - 8 = -10

slope of the line = -5 ÷ -10 = 0.5
---------------------------------------------------------------------------------------------------------------

Part B

The point-slope form is given by
(y - y₁) = m (x - x₁)

We have the gradient, m = 0.5
(x₁, y₁) = (8, 9) ⇒ You can also use the other coordinate (-2, 4)
Substitute these value into the form, we have

(y - 9) = 0.5 (x - 8)
----------------------------------------------------------------------------------------------------------------

Part C

The slope-intercept form is given by the equation
y = mx + c

Where m is the slope gradient and c is the point where the line intercepts the y-axis. We don't have the value of c at the moment but we can find out by simplifying the equation in part B

y - 9 = 0.5 (x - 8) ⇒ Multiplying out the bracket
y - 9 = 0.5x - 4
y = 0.5x - 4 + 9
y = 0.5x + 5 ⇒ This the slope-intercept form

7 0
3 years ago
Read 2 more answers
25y=15y+75 solve for y
MAXImum [283]

Answer:

y=7.5

Step-by-step explanation:

25y -15y =75

10y=75

y=7.5

plz mark brainliest

6 0
3 years ago
Read 2 more answers
A car valued at $15,000 depreciates 13% per year. What is the
Vinil7 [7]

Answer:

Value = $15,000 * (.87) ^ Years

After 4 years, .87 ^ 4 = 0.57289761

Value = $15,000 * 0.57289761 =

8,593.46

Step-by-step explanation:

3 0
4 years ago
Suppose we are interested in bidding on a piece of land and we know one other bidder isinterested. The seller announced that the
Tasya [4]

Answer:

a. 0.4 = 40% probability that your bid will be accepted

b. 0.8 = 80% probability that your bid will be accepted.

c. $15,000.

d. Bidding $15,000 guarantees you a profit of $1,000, while trying to bid less than $15,000, you can end up without a profit, thus, you should not consider bidding less than the amount in part (c).

Step-by-step explanation:

Uniform probability distribution:

An uniform distribution has two bounds, a and b.

The probability of finding a value of at lower than x is:

P(X < x) = \frac{x - a}{b - a}

Assume that the competitor’s bid x is a random variable that is uniformly distributed between $10,000 and $15,000.

This means that a = 10, b = 15, considering the measures in thousands of dollars.

a. Suppose you bid $12,000. What is the probability that your bid will be accepted?

Probability that the other bidder's bid is less than 12000(X < 12). So

P(X < 12) = \frac{12 - 10}{15 - 10} = \frac{2}{5} = 0.4

0.4 = 40% probability that your bid will be accepted.

b. Suppose you bid $14,000. What is the probability that your bid will be accepted?

Probability that the other bidder's bid is less than 14000(X < 14). So

P(X < 14) = \frac{14 - 10}{15 - 10} = \frac{4}{5} = 0.8

0.8 = 80% probability that your bid will be accepted.

c. What amount should you bid to maximize the probability that you get the property?

The upper bound of the uniform distribution, that is, $15,000.

d. Suppose you know someone who is willing to pay you $16,000 for the property. Would you consider bidding less than the amount in part (c)? Why or why not?

Bidding $15,000 guarantees you a profit of $1,000, while trying to bid less than $15,000, you can end up without a profit, thus, you should not consider bidding less than the amount in part (c).

5 0
4 years ago
(0, -3), (1, 0)<br> Find the slope
castortr0y [4]

Answer:

3 or 3/1 plssss mark brainliest

Step-by-step explanation:

4 0
3 years ago
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