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3 years ago

What is the slope of a line perpendicular to line A?

Mathematics

1 answer:

butalik [34]3 years ago

4 0

Answer:

what is the slope of Line A?

Step-by-step explanation:

once you have the slope of line a, you need to make the slope negative, and turn the number into its reciprocal, so if the slope of line a was 2/3, the perpendicular slope would be -3/2, you flip the fraction and make it a negative. if its a whole number you just put a one on top, so if the slope is 3, the perpendicular is -1/3

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lice walks along a road which can be modeled by the equation y=4x, where (0,0) represents her starting point. When she reaches a

olya-2409 [2.1K]

Answer:

(5,20)

Step-by-step explanation:

6 0

3 years ago

Of the following options, what could be a possible first step in solving the equation 8x + 3 = 2x − 15?

miskamm [114]

B.<span>Adding 15 to both sides of the equation.

A. Adding 8x to both sides wouldn't cancel anything out.
B. Adding 15 to both sides will cancel out 15 making it easier to solve for x.
C.Adding 3 to both sides will not cancel anything out.
D. Adding 2x to both sides won't cancel anything out. </span>

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2 years ago

How many ways can we pick three distinct integers from {1, 2, ..., 15} such that their sum is divisible by 3?

gogolik [260]

Answer:

Clearly from 1 to 15 we can only have the sum 6,9,12 and 15 to be divisible by 3.

Now meaning we have 4! ( 4 factorial) which implies 4x3x2x1= 24 .

We have 24 ways to pick distinct integers that are divisible by 3.

Step-by-step explanation:

The first thing you need to do is to look for numbers that are divisible by 3. Then you take its factorial

5 0

3 years ago

Pls help with all of this idk how to do

garik1379 [7]

4 times 1 = 4 so the top one would be 4/12, but i can't help with the rest because i don't understand what they are asking for

5 0

2 years ago

What are the exact solutions of x2 − 5x − 1 = 0 using x equals negative b plus or minus the square root of the quantity b square

geniusboy [140]

Answer:

$x=2.5+\frac{\sqrt{29}}{2}\\\\x=2.5-\frac{\sqrt{29}}{2}$

Step-by-step explanation:

So the question here is asking you to use the quadratic formula which is expressed as: $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\$

A quadratic can generally be expressed as: $y=ax^2+bx+c$

So using the equation you gave: $0=x^2-5x-1$

We can identify the following values: a=1, b=-5, c=-1

Btw the equation explicitly write "1" as the coefficient of x, but since it's not provided it's implied that it's 1.

So plugging in the known values, we get the following equation:

$x=\frac{5\pm\sqrt{(-5)^2-4(1)(-1)}}{2(1)}\\\\x=\frac{5\pm\sqrt{25+4}}{2}\\\\x=\frac{5\pm\sqrt{29}}{2}\\\\x=2.5+\frac{\sqrt{29}}{2}\\\\x=2.5-\frac{\sqrt{29}}{2}$

The last step just consists of taking the + and - solution, and since it asks for exact solutions you leave the 29 under the radical, and you don't approximate. There is no further simplification that can be done here.

5 0

1 year ago