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2 years ago

BRAINLYIST AND 20 PTS!!! What is the surface area of this design? 360in 280in 76in 392in

Mathematics

2 answers:

Ganezh [65]2 years ago

5 0

Answer:

392

Step-by-step explanation:

person above me is right

guapka [62]2 years ago

3 0

Answer:

392 I got that correct as well

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Find the value of x. 95° (7x - 4)^ (3x + 23) (9x - 6) ASAP PLEASE

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Answer:

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Step-by-step explanation:

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2 years ago

Which statements must be true? Select each correct answer.

Verdich [7]

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3 years ago

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Factor The Polynomial X2+X-6

pickupchik [31]

Answer:

C) (x-2)(x+3)

Step-by-step explanation:

x^2+x-6=(x-2)(x+3)

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3 years ago

A manufacturer wants to make open tin boxes from pieces of tin with dimensions 8 in. by 15 in. by cutting equal squares from the

Stells [14]

Answer:

$\frac{5}{3}$ in

Step-by-step explanation:

Let x be the side of square.

Length of box=8-2x

Width of box=15-2x

Height of box=x

Volume of box= $L\times B\times H$

Substitute the values then we get

Volume of box=V(x)= $(8-2x)(15-2x)x=(15x-2x^2)(8-2x)$

$V(x)=120x-30x^2-16x^2+4x^3$

$V(x)=4x^3-46x^2+120x$

Differentiate w.r.t x

$V'(x)=12x^2-92x+120$

$V'(x)=0$

$12x^2-92x+120=0$

$3x^2-23x+30=0$

$3x^2-18x-5x+30=0$

$3x(x-6)-5(x-6)=0$

$(x-6)(3x-5)=0$

$x-6=0\implies x=6$

$3x-5=0\implies x=\frac{5}{3}$

Again differentiate w.r.t x

$V''(x)=24x-92$

Substitute x=6

$V''(6)=24(6)-92=52>0$

Substitute x=5/3

$V''(5/3)=24(5/3)-92=-52$

Hence, the volume is maximum at x= $\frac{5}{3}$

Therefore, the side of the square , $x=\frac{5}{3}$ in cutout that gives the box the largest possible volume.

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2 years ago

Mayerlin read 28 pages in of an hour. At what rate, in pages per hour, did she read?

strojnjashka [21]

Answer:

28 pages per hour

Step-by-step explanation:

It says "Mayerlin read 28 pages in of an hour"

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1 year ago