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hoa [83]
3 years ago
6

X=?? will give brainliest

Mathematics
1 answer:
jeyben [28]3 years ago
3 0

Answer:

I think its a right angled triangle

and so x= 90°

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Katena32 [7]
The answer for y is positive
5 0
3 years ago
Pls help. Find the surface area of the solid. Round to the nearest tenth if necessary
Paladinen [302]

Answer:

850 m²

Step-by-step explanation:

There are 3 different pairs of rectangles—the side rectangles, the rectangles on the top and bottom, and the other side rectangles.

10x11=110

110x2=220

15x10=150

150x2=300

15x11=165

165x2=330

330+300+220=850 m².

8 0
3 years ago
An open box is to be made from a square piece of cardboard measuring 15 inches on a side by cutting a square from each corner an
vodomira [7]

Answer:

Dimensions are;

2.5 inches height

Base: 10 inches by 10 inches

Max volume; 250 Sq.in

Step-by-step explanation:

Let each side of the square that's cut-off from each corner be represented by x.

This means that the base of the box will be of dimension of the side 15−2x while the height of the box will be x.

Thus;

Volume of box is:

V = (15 − 2x)(15 − 2x)x

V = (15 − 2x)²x

V = (4x² - 60x + 225)x

V = 4x³ - 60x² + 225x

Let's differentiate with respect to x to get;

dV/dx = 12x² - 120x + 225

Maximum value of x is at dV/dx = 0

12x² - 120x + 225 = 0

Using quadratic formula, we arrive at;

x = 2.5 or 7.5

Now, let's find the second derivative of the volume;

d²V/dx² = 24x - 120

Putting x = 2.5 gives;

d²V/dx² = 24(2.5) - 120

d²V/dx² = -60

Thus, V is maximum at x = 2.5, since d²V/dx² is negative

At x = 7.5;

d²V/dx² = 24(7.5) - 120

d²V/dx² = 60

Thus, V is minimum at x = 7.5, since d²V/dx² is negative

Thus,we will use x = 2.5

Maximum volume; V = (15 − 2(2.5))(15 − 2(2.5))(2.5)

V = 10 × 10 × 2.5

V = 250 Sq.inches

Dimensions are;

(15 − 2x) = 15 - 2(2.5) = 10 inches

(15 − 2x) = 15 - 2(2.5) = 10 inches

x = 2.5 inches

6 0
3 years ago
2.192 closer. To 0 ,1,2,3
slega [8]
Closer to 2. If you round it, because the number after the 2 is less than 5 you round it down so it's closer to 2
6 0
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Convert to a fraction in simplest terms: .45
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Answer:

9/20

Step-by-step explanation:

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3 years ago
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