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4 years ago

I have been on this problem for about half an hour. 0.4(8-0.2w)=-4 w=?

Mathematics

1 answer:

Leya [2.2K]4 years ago

8 0

0.(8-0.2w)=-4

W=90

hope this helps! :)

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Easy algebra answer asap!!

kykrilka [37]

Step-by-step explanation:

f(-1) =4.5

use this desmos, desmos is the best graphing calculator

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3 years ago

Does the following infinite series converge or diverge? 1/3+2/9+4/27+8/81+...

PilotLPTM [1.2K]

Note that A and D are ludicrous choices, so you can throw them away outright. (Any divergent series cannot have a sum, and any convergent series must have a sum.)

The sum is certainly convergent because it can be written as a geometric sum with common ratio between terms that is less than 1 in absolute value.

$S=\dfrac13+\dfrac29+\dfrac4{27}+\dfrac8{81}+\cdots$
$S=\dfrac13\left(1+\dfrac23+\dfrac{2^2}{3^2}+\dfrac{2^3}{3^3}+\cdots\right)$

We can then find the exact value of the sum:

$\dfrac23S=\dfrac13\left(\dfrac23+\dfrac{2^2}{3^2}+\dfrac{2^3}{3^3}+\dfrac{2^4}{3^4}+\cdots\right)$

$\impliesS-\dfrac23S=\dfrac13$
$\implies\dfrac13S=\dfrac13$
$\implies S=1$

So the answer is B.

8 0

3 years ago

If there is $2.40 per 4 ounces, what is the constant of proportionality?

maks197457 [2]

Answer:

Constant of Proportionality is 0.6 or $0.60 per oz

Step-by-step explanation:

Divide $2.40 (cost) by 4 ounces (the number of the item) > 2.40 ÷ 4. Also known as Y/X.

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3 years ago

a square has a surface area of 24 square meters. what is the area of each face? What is the length of each edge?

Lisa [10]

Do you mean a cube has a surface area?
If so we identify by how many faces a cube has which is 6. That would mean to find the surface area we add each squares area to get 24. So we divide 24 and 6 to get the area of each face.

24 / 6 = 4 m^2

We know that a square has equal side lengths thus finding that A = a^2. We find the square root of 4 to get the length of each square.

sqrt 4 = 2 m

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4 years ago

Draw a line representing the "rise" and a line representing the "run" of the line. State the slope of the line in simplest form.

koban [17]

Answer:

Rise is a vertical line from 0 to 4

Run is a horizontal line from 0 to 4

Slope of a line is called the gradient.

Additional information:

Gradient =rise/run

= 4/4

= 1

Y=mx +c

Y=1x +4

Y= x+4

But the slope show a negative correlation, so gradient will be negative & it's y = - x + 4.

BTW the rise and run could also be from 4 on the y-axis and down to the 4 on the x-axis.

So, there is two possible triangles you could make.

As a result, the rise is a straight line going up or down ( vertical ) and the run is a straight line going across from left to right (horizontal).

7 0

3 years ago