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11111nata11111 [884]
3 years ago
15

I need some help anyone? pls

Mathematics
1 answer:
weqwewe [10]3 years ago
4 0
You have now two polynomials one for length and one for the widht fo the rectangle.

a) The perimeter is the sum of the 4 sides, that is 2 * (length + width) = 2 * (5x^2 + 1 +x^2 + 4) = 2 * (6x^2 + 5) = 12x^2 + 10.

b) The area is length * width = (5x^2 + 1)*(x^2 + 4)

Apply distributive property to multiply:

5x^4 + 20x^2 + x^2 + 4 = 5x^4 + 21x^2 + 4
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Read 2 more answers
X2<br>2<br>ab<br>ab to<br>b<br>The diagian<br>K<br>n shows<br>rectangle. The shade<br>Find x.<br>​
Norma-Jean [14]

Answer:

x = 28 cm

Step-by-step explanation:

Given:

Area of link shaded regions = 84 cm²

Required:

The value of x (diameter of the semicircle/length of the rectangle)

Solution:

Diameter of the semicircle = 2r = x

Length of rectangle (L) = 2r = x

Radius of semicircle (r) = ½x

Width of rectangle (W) = radius of semicircle = ½x

Use 3.14 as π

Area of the link shaded regions = area of rectangle - area of semicircle

Thus:

Area of the link shaded regions = (L*W) - (½*πr²)

Plug in the values

84 = (x*½x) - (½*3.14*(½x)²)

84 = x²/2 - (1.57*x²/4)

84 = x²(½ - 1.57/4)

84 = x²(0.5 - 0.3925)

84 = x²(0.1075)

Divide both sides by 0.1075

84/0.1075 = x²

781.4 = x²

√781.4 = x

27.9535329 = x

x = 28 cm

5 0
3 years ago
Pls help w this :) 25+ points...
Anna11 [10]

Answer:

i think its A

Step-by-step explanation:

6 0
4 years ago
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