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3 years ago

HELP ASAP PLEASE!!!

Mathematics

2 answers:

Varvara68 [4.7K]3 years ago

7 0

Answer:

Step-by-step explanation:

The answer is B. If you use this site called Desmos Graphing Calculator. Type out all the possible answers, and use the process of elimination.

Mariana [72]3 years ago

7 0

Answer:B

Step-by-step explanation:

When you add to x, it goes up

subtract from x and it goes down

in this case, you wanna add to x, and add 3

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A box has a volume of 192 cubic inches, a length that is twice as long as its width, and a height that is 2 inches greater than

ruslelena [56]

Answer:

Therefore the dimension of the cuboid is 8 inches×4 inches ×6 inches.

Step-by-step explanation:

Cuboid : A cuboid is a three dimension shape. The length ,breadth and height of a cuboid are not same.

A cuboid has 6 faces.
A cuboid contains 8 vertices.
A cuboid contains 12 edges .
The total surface area of a cuboid is

= 2(length×breadth+breadth×height+length×height) square units

The dimension of a cuboid is written as length×breadth×height.

The volume is( length×breadth×height) cubic units

Given that the volume of the box is 192 cubic inches.

Let x inches be the width of the cuboid.

Since the length is twice as long as its width.

Then length = 2x inches

Again height is 2 inches longer than width.

Then height = (x+2) inches.

Therefore the volume of the cuboid is

$=[x\times 2x\times (x+2)]$ cubic inches

$=[2x^2(x+2)]$ cubic inches

$=(2x^3+4x^2)$ cubic inches

According to the problem,

$2x^3+4x^2=192$

$\Rightarrow 2x^3+4x^2-192=0$

$\Rightarrow 2(x^3+2x^2-96)=0$

$\Rightarrow (x^3+2x^2-96)=0$

$\Rightarrow x^3-4x^2+6x^2-24x+24x-96=0$

$\Rightarrow x^2(x-4) +6x(x-4)+24(x-4)=0$

$\Rightarrow (x-4)(x^2+6x+24)=0$

Therefore x=4

Since the all zeros of x²+6x+24 =0 is negative.

Therefore breadth = 4 inches

length=(2×4) inches=8 inches

and height = (4+2)inches = 6 inches.

Therefore the dimension of the cuboid is 8 inches×4 inches ×6 inches.

8 0

3 years ago

Consider triangle ABC where AB=X+5, BC=X-2, area is 30cm squared. Find X by solving X^2+3X-70=0, and find the perimeter.

klasskru [66]

Answer:

What the hell AC is not given so you can't find the Perimeter

Step-by-step explanation:

x^2+3x-70=0

(x-7)(x+10)=0

x-7=0

x+10=0

x=-10

AB=x+5

AB=12

AB=-5

BC=x-2

BC=5

BC=-12

Area of ABC = 30cm2

Perimeter of ABC = AB+BC+AC

8 0

3 years ago

-32=2(x2 + 10x) what are the steps to solve this

Marysya12 [62]

Answer:

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Step-by-step explanation:

idkreeeeeeeeee

4 0

3 years ago

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100 stickers are evenly divided between 16 children how many stickers will be left over at the end

puteri [66]

Answer:

Step-by-step explanation:

First, we can know our multiplication charts and know that 16 x 6 = 96

96 is the closest we can get to 100 while still having a remainder, which is 4

4 is the remainder, and is the amount left over.

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3 years ago

Jamal wants to my new snow pants that cost $48. If Jamal save six dollars a week for five weeks and five dollars a week for thr

Vinvika [58]

Answer:

Step-by-step explanation:

$6 x 5 weeks = $30

$5 x 3 weeks = $15

$30+$15 = $45

He will not have enough for new snow pants. He would need $3 more.

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3 years ago