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2 years ago

Can somebody help me

Mathematics

1 answer:

iogann1982 [59]2 years ago

7 0

Answer:

a) yes

b) yes

c) yes

d) no

e) no

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Let x cm be the width of a rectangle whose length is 16 cm longer than its width.

nika2105 [10]

We know that Length = x + 16 and Width = x.

Since the perimeter of the rectangle is 2 lengths + 2 widths,

Perimeter = 2(2x + 16) = 4x + 32.

6 0

3 years ago

Write an expression to represent:<br><br> One minus the product of four and a number x.

Airida [17]

Answer:

1 - 4x

1 - (4x)

4 0

3 years ago

Find an equation of the plane. The plane through the points (0, 9, 9), (9, 0, 9), and (9, 9, 0) Incorrect: Your answer is incorr

Andrei [34K]

Answer:

The equation of the plane is represented by $\frac{1}{18}\cdot x + \frac{1}{18}\cdot y + \frac{1}{18}\cdot z = 1$ .

Step-by-step explanation:

Algebraically speaking, a plane can be represented by following vectorial product:

$(a,b, c)\,\bullet\,(x,y,z) = 1$ (1)

Where:

$a$ , $b$ , $c$ - Plane coeffcients.

$x$ , $y$ , $z$ - Coordinates.

We need three distinct points to determine all coefficients. If we know that $(x_{1},y_{1},z_{1}) = (0,9,9)$ , $(x_{2},y_{2}, z_{2}) = (9,0,9)$ and $(x_{3},y_{3},z_{3}) = (9,9,0)$ , the system of equations to be solved is:

$9\cdot b + 9\cdot c = 1$ (1)

$9\cdot a + 9\cdot c = 1$ (2)

$9\cdot a + 9\cdot b = 1$ (3)

The solution of this system is $a = \frac{1}{18}$ , $b = \frac{1}{18}$ , $c = \frac{1}{18}$ .

Hence, the equation of the plane is represented by $\frac{1}{18}\cdot x + \frac{1}{18}\cdot y + \frac{1}{18}\cdot z = 1$ .

7 0

3 years ago

What is the volume of a sugar cube that measure 1cm on each side? what is the cross-sectional area of the cube? the total surfac

Nesterboy [21]

These are important and common formulas; better learn them!

The volume of a cube of side length x is x^3.
The cross-sectional area is x^2.
The total surface area is A = 6x^2.

8 0

3 years ago

PLEASE HELP WILL GIVE BRAINLIEST

devlian [24]

Answer:

(2, -1)

Step-by-step explanation:

x = 2, y = −1

7 0

2 years ago