MATHEMATICS MIDDLE SCHOOL

What is the surface area of the composite solid?(Picture 1)

A. 119 m2
B. 146 m2
C. 162 m2
D. 174 m2
What is the surface area of the composite solid? (Picture - 1

Answers

Answer 1
Answer:

Hence surface area of figure is  option d-174 m^(2)

What is surface area ?

The surface area of an object is the entire area filled by its surfaces. Varying 3D shapes have different surface areas in geometry, which may readily be determined using the formulas we'll learn in this lesson. The surface area is divided into two groups  lateral and total.

How to solve ?

the figure contains 3 , 3-d figures

one cube-3 m each,

1 cuboid-legth-9 m,height-3m-breadth-2 m,

1 cuboid- length-5 m, breadth-2m,height-2 m

hence surface area of 3 figures=

cube=6x^(2)=24m^(2)

cuboid=2(lb+bh+hl)=2(10+4+10)=48m^(2)

cuboid=2(lb+bh+hl)=2(18+6+27)=102m^(2)

add all we get =174 m^(2)

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Answer 2
Answer:

Answer:

Correct answer is C. 162 m2

Step-by-step explanation:

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Answers

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it would be 9.87 good luck

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Answers

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An estimate for -93 is.

Answers

Answer:

-90

Step-by-step explanation:

Three is a zero of the equation x^3−4x^2−3x+18=0. Which factored form is equivalent to the equation?

Answers

Answer:

x_1=-2,\ x_2=x_3=3\n \n(x+2)(x-3)^2=0

Step-by-step explanation:

Consider the equation

x^3-4x^2-3x+18=0

The zeros of the equation can be the divisors of 18:

\pm 1,\ \pm2,\ \pm3,\ \pm 6,\ \pm 9,\ \pm 18

Check them:

1^3-4\cdot 1^2-3\cdot 1+18=1-4-3+18=10\neq 0\n \n(-1)^3-4\cdot (-1)^2-3\cdot (-1)+18=-1-4+3+18=16\neq 0\n \n2^3-4\cdot 2^2-3\cdot 2+18=8-16-6+18=4\neq 0\n \n(-2)^3-4\cdot (-2)^2-3\cdot (-2)+18=-8-16+6+18=0

So, x=-2 is zero. Now

x^3-4x^2-3x+18\n \n=x^3+2x^2-6x^2-12x+9x+18\n \n=x^2(x+2)-6x(x+2)+9(x+2)\n \n=(x+2)(x^2-6x+9)\n \n=(x+2)(x-3)^2

Thus, x=3 is the second root (of multiplicity 2)

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Answers

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Answers

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