The grades on an easy quizquiz Choose the correct answer below.

Mathematics

1 answer:

Zigmanuir [339]3 years ago

8 0

Answer:

Step-by-step explanation:

If it's an easy quiz, there would be a lot of students with high grades, therefore, the data set would be skewed left, the mode would be in the right side of the graph, then we would have the median and the mean would be the lower value. There would be just a few students with lower grades and this grades would pull the mean away from the median toward the left.

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Ann weighs 259 pounds but is only 5 feet 3 inches tall. Betty is 6 feet tall. How much would you expect Betty to weigh if they h

Tom [10]

Answer:

D. 296.00 LBS

Step-by-step explanation:

We convert both heights to inches.

1 ft = 12 in.

5 ft 3 in = 5 × 12 in. + 3 in. = 63 in.

6 ft = 6 × 12 in. = 72 in.

$\dfrac{63~in.}{259~lb} = \dfrac{72~in.}{x}$

$\dfrac{63x}{259} = 72~lb$

$x = \dfrac{259 \times 72~lb}{63}$

$x = 296~lb$

Answer: D. 296.00 LBS

7 0

2 years ago

Given the function y = x^4- 8x² + 16.

nevsk [136]

Answer:

Step-by-step explanation:

Recall that we use the first derivative to discover where a function is increasing or decreasing; it's increasing where the first derivative is + and decreasing where the first derivative is -.

The derivative of y = x^4 - 8x^2 + 16 is dy/dx = 4x^3 - 16x, or 4x(x^2 - 4).

This can be factored further: 4x(x - 2)(x + 2).

Set this equal to zero and solve for the three critical values:

{-2, 0, 2}.

Set up a total of four intervals: (-∞, -2), (-2, 0), (0, 2), (2, ∞).

Now choose a test point within each interval: {-3, -1, 1, 3}.

Evaluate the first derivative, dy/dx, at each of these four test points. Rule: if the first derivative is +, we know the function is increasing on that interval; if -, the function is decreasing.

At x = -3, dy/dx = 4x(x - 2)(x + 2) becomes (-)(-)(-), which is -, so we know that the function is decreasing on interval (∞, -2).

At x = -1, dy/dx is (-)(-)(+), which is +, so we know that the function is increasing on (-2, 0).

At x = 1, dy/dx is (+)(-)(+), which is -, so we know that the function is decreasing on (0, 2).

Finally: at x = 3, dy/dx is (+)(+)(+), so we know that the function is increasing on (2, ∞ ).

5 0

4 years ago

A number which precedes a variable and that can be expressed in the form a/b (where a and b are integers) is called a ___ coeffi

Vadim26 [7]

The answer is: Rational coefficient.

The explanation for this answer is shown below:

1. By definition, a rational number has the form $\frac{a}{b}$ where $a$ is the numerator and $b$ is the denominator. The numerator and the denominator are integers.