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3 years ago

Which of the following BEST describes a pyramid?

Mathematics

1 answer:

Jet001 [13]3 years ago

3 0

Answer:

Step-by-step explanation:

Pyramids must have bases and a point off the base

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Please anyone help me answer this question am giving the brainliest

DochEvi [55]

Answer:

(-3/2x+1) + (3/x-1)

Step-by-step explanation:

Dont put the answer in parenthesis, I just did that to seprate it so it was easier to read. If you need it to be put in word form for it to be easier for you to understand, its "negative three divided by two x plus one, plus 3 divided by x minus 1"

First, rewrite the expression as 3x+6/2x^2+x-2x-1

Then, factor the expression, 3x+6/x*(2x+1)-(2x+1) (*=multiply)

Then, write a new fraction for each factor in the denominator, then write a new fraction, 3x+6/(2x+1)*(x-1) to (A)/2x+1 + B/x-1)

Then write terms in the numerators, for now we will use A and B.

Now we set the sum of the fractions equal to the original fraction.

3x+6/(2x+1)*(x-1) = A)/2x+1 + B/x-1).

Then reorder and group the terms, giving you 3x+6=(A+2B)x+(-A+B).

Now equate the coefficiants, {6= -A+B, 3= A+2B

Then substitute back, (A, B)=(-3, 3)

Now finally, just rewrite the fraction. (-3/2x+1) + (3/x-1)

Hope this helps! Sorry its kind of long.

6 0

2 years ago

What is the meaning of the slope of mr taylor's line? pls help! a lot of points

Sedaia [141]

Answer:

The slope is the percentage of test score per number of days absent

Step-by-step explanation:

we know that

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have

y -----> is the percentage of test score

x ----> is the number of days absent

That means -----> The slope is the percentage of test score per number of days absent

In this problem the slope is negative

If the percentage test score increases----> the number of days decreases

If the percentage test score decreases----> the number of days increases

7 0

3 years ago

PLEASE NEED ANSWER FAST

ahrayia [7]

c or d for sure hope this helps

5 0

2 years ago

Factor the following equation 2n2 -n -45

Genrish500 [490]

Answer:

( n − 5 ) ( 2 n + 9 )

Step-by-step explanation:

Factor by grouping

7 0

3 years ago

If 16g if a radioactive substance are present initially and 5yr later only 8g remain how much substance will be present after 5y

Romashka [77]

4.59 g will be the amount of substance that will be present after 5 year.

Given: 16g of radioactive substance

8g left after 8 year

Concept: In a chemical reaction, the half-life of a species is the time it takes for the concentration of that substance to drop to half its original value. In a first-order reaction, the half-life of the reactant is ln(2)/λ, where λ (also referred to as k) is the reaction rate constant.

The half-life is given as 5 years, so the amount remaining after 9 years will be found by using the steps done below:

Remaining amount of radioactive substance = initial × (1/2)^(t/(half-life))

Remaining substance = (16 g)×(1/2)^(9/5) ≈ 4.59 g

After 9 years i.e., after 8 years have passed

About 4.59 g of the substance remains.

For more information about radioactivity, visit brainly.com/question/2320811

#SPJ4

4 0

2 years ago