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2 years ago

Help please with this iready. Before 11:35. I give thanks

Mathematics

1 answer:

Paladinen [302]2 years ago

7 0

Answer:

y=x+4

Step-by-step explanation:

i took the test. good luck!

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Write the slope-intercept form of the equation through (4, 2) perpendicular to y=4x-4

Snezhnost [94]

Answer:

y = -1/4x + 3

Step-by-step explanation:

y=mx+b is the slope-intercept form, which your equation y=4x-4 is already in.

To find the perpendicular line, you must take the negative reciprocal of the slope.

y = -1/4x + b

Your "b" will not be the same as the given equation, since the y-intercepts will not be the same. Therefore, you must solve for it using the point given.

Plug in (4, 2) [general: (x, y)] to the corresponding spots in y = -1/4x + b.

(2) = -1/4(4) + b

2 = -1 + b

b = 3

Now that you know m and b, you can plug all the values back into the form y = mx+b.

**Remember that y and x are never plugged back in! You need two variables to have a linear line

y = -1/4x + 3 is the answer.

5 0

3 years ago

The assistant manager of a surf shop estimates that 65% of customers will make a purchase. Part A: How many customers should a s

Ivan

Answer:

A) 2

B) 0.239

Step-by-step explanation:

Part A) Expected value of a binomial distribution is the number of trials times the probability of success.

X = np

Given X = 1 and p = 0.65:

1 = 0.65n

n = 1.54

Rounding up, a salesperson should expect 2 customers until he finds a customer that makes a purchase.

Part B) Use binomial probability.

P = nCr pʳ qⁿ⁻ʳ

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1−p).

Given n = 3, r = 1, p = 0.65, q = 0.35.

P = ₃C₁ 0.65¹ 0.35³⁻¹

P ≈ 0.239

Or, using binompdf function in a calculator:

binompdf(n, p, r)

= binompdf(3, 0.65, 1)

≈ 0.239

3 0

3 years ago

The number 13 is less than the number of hours Nathan's volleyball team trains in a week. Which of the following inequalities re

Elza [17]

Answer : A x > 13

The number 13 is less than the number of hours Nathan's volleyball team trains in a week.

Let the number of hours in a week is x

Question says 13 is less than the number of hours

So we can write it as 13 < x

We always put the variable in the left. When we switch the variable then we reverse the inequality sign.

13 < x can be written as x > 13

6 0

3 years ago

Read 2 more answers

find the lenght of the poster board is 2 feet and the width is 1 whats the serea of the board of the poster

rusak2 [61]

2 square feet is the answer

8 0

3 years ago

Find the vertex, the axis of symmetry, and the y-intercept of the graph.

UNO [17]

Given:

Given that the graph of the parabola.

We need to determine the vertex, the axis of symmetry and the y - intercept of the graph.

Vertex:

The vertex of the parabola is the point at which the parabola changes its direction.

From the graph, it is obvious that the parabola changes its direction at the point (-2,0)

Hence, the vertex of the graph is (-2,0)

Axis of symmetry:

The axis of symmetry is the line that divides the parabola exactly into two equal halves.

Hence, from the graph, it is obvious the line x = -2 divides the graph exactly into two equal halves.

Hence, the axis of symmetry is x = -2.

y - intercept:

The y - intercept of the parabola is the value of y when x = 0.

In other words, the y - intercept of the graph is the value of y when the line passes through the y - axis.

Thus, from the graph it is obvious that when x = 0, the value of y is -3.

Hence, the y - intercept of the graph is -3.

6 0

3 years ago