use the slope formula to determine the slope of the line that passes through the points (-5,-3) and (9,-10)

Mathematics

1 answer:

kifflom [539]3 years ago

5 0

$\frac{-10-(-3)}{9-(-5)}\\ \\\frac{-7}{14}\\ \\= \frac{-1}{2}\\ \\$

Slope: -1/2

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In how many ways can we seat 6 people around a round table if Fred and Gwen insist on sitting opposite each other? (Two seatings

photoshop1234 [79]

Make a picture of the problem.

Fred and Gwen are seated opposite each other, and we name the 4 remaining seats 1, 2, 3, 4, starting from the right of Fred.

There are 4 options for seat 1,

then 3 for the seat 2, after one is seated in the 1.st seat

2 options for the seat 3,

and 1 for the seat 4.

That is, the 4 friends can sit in 4*3*2*1=24 different ways.

Answer: 24

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3 years ago

Find the coefficient of x^4 in the expansion of (1 + 2x + 3x^3)^10?

Lesechka [4]

$(1+2x+3x^3)^{10}$

The only possible configurations of terms that contribute to generating the $x^4$ term in the expansion are given by the multinomial theorem to be

$\left(\dbinom{10}{6,4,0}(1)^6(2x)^4(3x^3)^0+\dbinom{10}{8,1,1}(1)^8(2x)^1(3x^3)^1\right)x^4$

where

$\dbinom{10}{k_1,\ldots,k_m}=\dfrac{10!}{k_1!\cdots k_m!}$

Simplifying a bit gives a coefficient of

$\dbinom{10}{6,4,0}(2)^4+\dbinom{10}{8,1,1}(2)(3)$
$16\dbinom{10}{6,4,0}+6\dbinom{10}{8,1,1}$
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3 years ago

A function, F(x), is shown below.

Maksim231197 [3]

Answer:

range of f(x) = [-4, -2) ∪ [2, 8)

a+b+c+d = -4

Step-by-step explanation:

The graph is attached. The range is the vertical extent of the function. It is defined at f(0) = -4 and f(2) = 2.

The limits f(2-) and f(4-) are -2 and 8, respectively, so the graph has open circles there. These are the ends of the two half-open intervals that make up the range of the function.

The portion of the graph in the domain [4, 7) is included in the range [2, 8), so no special treatment is needed for that piece of the function.