767 Answered Questions for the topic Pre Calculus

9h

#### The table below shows the temperature (in °F) t hours after midnight in Phoenix on March 15. The table shows values of this function recorded every two hours.

Estimate the value of T'(6). Give units in your answer.
What is the meaning of T'(6)?
t
0
2
4
6
8
10
12
14
T
73
73
70
68
73
80
86
89

2d

#### What would this function be?

Your function should have roots -2, -1, and 2 also must include the point (0,4).

4d

#### Minima or Maxima

Approximate (to two decimal places) any relative minima or maxima
f(x) = 3x2 - 2x - 5
f(x) = x3 - 3x2 - x + 1
f(x) = x(x-2)(x+3)

4d

#### functions domain and range

For each function below, state domain and range, name the intervals where function is increasing or decreasing, and describe end behavior.f(x) = 1/2 x2y = x2 + 3y = -3x2

5d

#### Find all intercepts of the function. f(x)= -3+ sqrt(23-x^2)

Find all intercepts of the function. f(x)= -3+ sqrt(23-x^2)If there is more than one answer, enter them in a list separated by commas. Enter exact answers: decimal approximations will be marked...
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8d

#### Precalc question

Use the cut-point method to find the solution set of the following inequality: (x + 4)(x – 5)(4x + 1) ≥ 0. What are the cut points?
-4, 5, 1/4
-4, 5, -1/4
-4, -5, -1/4
-4, -5, 1/4

8d

#### Precalc question

Write the equation of an ellipse with center (0, 0), vertices (3, 0) and (–3, 0) , and foci (2, 0) and (–2, 0).
x^2/5 + y^2/9 = 1
x^2/9 + y^2/4 = 1
x^2/4 + y^2/9 = 1
x^2/9 + y^2/5 = 1

8d

#### Precalc Question

Given the function f(x) = x3 + 2x2 – 5x – 6, use synthetic division to find the value of f (1).
8
−8
0
2

8d

#### Precalc question

Find the domain of this function: -5/x+1
{x | x ≠ −5}
{x | x ≠ 1}
{x | x ≠ −1}
all real numbers

8d

#### Precalc Question

Given the function f(x) = x3 + 2x2 – 5x – 6, use synthetic division to find the value of f (– 2).
4
−4
2
0

9d

#### Pre math question

Find the value of a for this series: 3 + 2 + 4/3 +8/9 + 16/27 + ...
2/3
3
3/2
1/3

9d

#### Precalculus question

Use this system to find the value of the determinant: 3x + y = 3 x - 2y = 8
–7
5
7
−5

9d

#### question of math

What are the roots of f(x) = x4 – 16?
2,2,2i,2i
–2, 2, –2i, 2i
–2,–2,2,2
2i, 2i, –2i, –2i

9d

#### pre math question

The perimeter of a triangle is 26 inches. then two equations can be written as
z = 2x and y = x + 2.
x = 2z and x = y + 2.
x = 2z and y = x + 2.

9d

#### calculus question

The perimeter of a triangle is 26 inches. If the longest side is twice as long as the shortest side, and the third side is 2 inches longer than the shortest side. Which algebraic equation would...
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9d

#### PreCalculus question

Use the Binomial Theorem to find the coefficient of the fifth term: (2x + 1)^7a. C(7,3)b. C(7,4)c. C(6,5)c. C(7,5)

9d

#### Precalculus question

Write f(x) = x3 + 25x in factored form. f(x) =a. (x+25i)(x+1)(x–1)b.(x+25)(x+i)(x–i)c. x(x+5i)(x–5i)d. x(x+5i)(x–5i)

9d

#### Precalculus Question

Find a polynomial function with real coefficients that has 1 and 4i as it roots.a. x3+x2+16x + 16b. x3–x2–16x – 16c. x3+x2+16x + 16d. x3–x2–16x + 16

10d

#### Find coterminal angles in both degrees and radians

What is the negative and positive coterminal of 3pi

13d

#### Precalc question

An isosceles triangle has sides of length x, x and y. In addition, assume the triangle has perimeter 12.(a) Find the rule for a function that computes the area of the triangle as a function of x....
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13d

#### Precalc question

An isosceles triangle has sides of length x, x and y. In addition, assume the triangle has perimeter 12.(a) Find the rule for a function that computes the area of the triangle as a function of x....
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13d

#### Precalc question

An isosceles triangle has sides of length x, x and y. In addition, assume the triangle has perimeter 12.(a) Find the rule for a function that computes the area of the triangle as a function of x....
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13d

#### Please help: calculus prob

The graph of the derivative, f '(x) is shown below. On what interval is the graph of f (x) concave up?Option:
Concave up on (-∞, -1)
Concave up on (-∞, -∞)
Concave up on (-1, ∞)
Concave up on (-6,...
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