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3 years ago

Help is needed plz. I'll give 15 points !

Mathematics

2 answers:

erastovalidia [21]3 years ago

7 0

x ≠ 1 and x ≠ 3 are the two restrictions

Step-by-step explanation:

Step 1: In the given expression, the denominators are x - 1 and x - 3. If the denominators become zero, the answer cannot be defined.

A number divided by zero cannot be defined, so the denominators cannot be zero.

⇒ x - 1 = 0

∴ x = 1

⇒ x - 3 = 0

∴ x = 3

So these are the two restrictions, x ≠ 1 and x ≠ 3

german3 years ago

4 0

.............X≠3 and X≠1..............

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What is the area of a sector with a central angle of 255 and a radius of 18.4 m?

Igoryamba

Answer:

The answer is 753.01 m².

Step-by-step explanation:

Given that the formula of sector is θ/360×π×r² where r represents radius of circle. Then, you have to substitute the values into the formula :

$area = \frac{θ}{360} \times \pi \times {r}^{2}$

Let θ = 255°

Let π = 3.14,

Let r = 18.4m,

$area = \frac{255}{360} \times 3.14 \times {18.4}^{2}$

$area = 753.01 {m}^{2} \: (near.hundredth)$

5 0

3 years ago

The sum of the measures of the interior angles of a polygon with n sides is

defon

ANSWER

$(n - 2) \times 180 \degree$

EXPLANATION

The sum of the interior angles of a triangle is 180°

We can rewrite this as:

$1 \times 180 \degree = (3 - 2) \times 180 \degree = 180 \degree$

The sum of interior angles of a quadrilateral is 360°

We can also rewrite this as:

$2 \times 180 \degree = (4- 2) \times 180 \degree = 360 \degree$ In general an n-sided polygon has

the sum of the interior angles given by the formula:

$(n - 2) \times 180$

8 0

3 years ago

Verify this cofunction identity by using the difference identity for cosine. Show your work! cos⁡(π/2-θ)=sinθ

taurus [48]

Cos(A-B) = cosAcosB + sinAsinB

cos(π/2 - θ) = cos(π/2)cosθ + sin(π/2)sinθ

π/2 = 90°
cos(π/2) = cos90° = 0. sin(π/2) = sin90° = 1

cos(π/2 - θ) = cos(π/2)cosθ + sin(π/2)sinθ

= 0*cosθ + 1*sinθ = sinθ

Therefore cos(π/2 - θ) = sinθ

QED

8 0

3 years ago

1+2=21, 2+3=36,3+4=43,4+5=?

Anni [7]

1+2=21, 2+3=36, 3+4=43, 4+5=52.

4 0

3 years ago

Read 2 more answers

Graph the function y= 3/2x^3. Plot five points on the graph of the function: one point with x = 0, two points with negative x-va

Nat2105 [25]

Answer:

(a square +7a+12) ÷(a+3)

5 0

2 years ago