3 years ago

WILL MARK BRAINLIEST

Mathematics

1 answer:

Korolek [52]3 years ago

4 0

Answer: B. 4

Step-by-step explanation:

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What is another way to write 30*1200

levacccp [35]

I would honestly put, "1200*30" lol

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3 years ago

|b|+b^3;b=-2 evaluate the expression

saveliy_v [14]

Answer:

-6

Step-by-step explanation:

$| - 2| = 2 \\ {( - 2)}^{3} = ( - 2)( - 2)( - 2) = ( - 8) \\ \\ | - 2 | + {( - 2)}^{3 } = 2 - 8 = - 6$

5 0

4 years ago

From a square piece of cardboard paper of area size 9 m2 , squares of the same size are cut off from each corner of the paper. T

levacccp [35]

Answer:

Max vol = 2 cubic metres

Step-by-step explanation:

Given that from a square piece of cardboard paper of area size 9 m2 , squares of the same size are cut off from each corner of the paper.

Side of the square = 3m

If squares are to be cut from the corners of the cardboard we have the dimensions of the box as

3-2x, 3-2x and x.

Hence x can never be greater than or equal to 1.5

V(x) = Volume = $V(x) = x(3-2x)^2\\= 9x+4x^3-12x^2$

We use derivative test to find the maxima

$V'(x) = 9+12x^2-24x\\V"(x) = 24x-24\\$

Equate I derivative to 0

$9+12x^2-24x=0\\x=1/2,3/2$

If x= 3/2 box will have 0 volume

So this is ignored

V"(1/2) <0

So maximum when x =1/2

Maximum volume

= $9(1/2)+4(1/2)^3-12(1/2)^2\\=2$ cubic metres

6 0

3 years ago

Brainly wont let me use question, screenshot below.

Trava [24]

I think it’s 82 because 78+4=82

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3 years ago

iris has 120 songs on her playlist each week she downloads 4 new songs. write an expression to show the total number of songs on

Leni [432]

Answer:

4 W = n of songs on her playlist

$n \leqslant 120$

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3 years ago