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3 years ago

How many one-third packages can the worker make from 20 pounds of cookies?

Mathematics

1 answer:

andreev551 [17]3 years ago

5 0

Answer: 60

Step-by-step explanation:

1/3 means 3 packages per 1 pound

3 x 20 + 60

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Please answer asap!!

jonny [76]

-3x(-7) = -3(-2)(-7) ⇒ -42

-42 would be the answer.

4 0

3 years ago

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How many pounds are equivalent to 40 oz

Tanzania [10]

Answer:

Step-by-step explanation:

40 ounces equal 2.5 pounds (40oz = 2.5lbs). Converting 40 oz to lb is easy.

4 0

3 years ago

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The only solution to x^2+bx+c=0 is x=5 find a and b

miss Akunina [59]

Answer:

b=-10

c=25

Step-by-step explanation:

if the only solution is 5 so

x^2+bx+c=(x-5)²=x²-10x+25

b=-10

c=25

5 0

3 years ago

For what values of x is the graph of y equals negative 3 divided by the quantity 4 plus x concave downward?

Elena-2011 [213]

We are given our function as

$y=\frac{-3}{x+4}$

For finding concavity , firstly we will find second derivative

$y'=\frac{d}{dx}\left(\frac{-3}{x+4}\right)$

$=-3\frac{d}{dx}\left(\frac{1}{x+4}\right)$

$=-3\left(-\frac{1}{\left(x+4\right)^2}\right)\cdot \:1$

$y'=\frac{3}{\left(x+4\right)^2}$

now, we can find derivative again

$y''=\frac{d}{dx}\left(\frac{3}{\left(x+4\right)^2}\right)$

$=3\frac{d}{dx}\left(\left(x+4\right)^{-2}\right)$

$y''=3\left(-\frac{2}{\left(x+4\right)^3}\right)\cdot \:1$

$y''=-\frac{6}{\left(x+4\right)^3}$

now, we can know second derivative is undefined when denominator =0

so, we set denominator =0

and then we can solve for x

$x+4=0$

$x=-4$

now, we can draw a number line and locate x=-4

and then we can find sign of second derivative on each intervals

so,

Concave downward interval:

$(-4,\infty)$

6 0

3 years ago

Find the missing length!!!!!

sineoko [7]

Answer:

2x^2+4x

HOPE THIS HELPS

-Todo <3

Step-by-step explanation:

9x^2+2x

2x^2+4x

(if you would like an explanation let me know :D)

3 0

3 years ago