Why does the fraction 20/25 not belong with 1/20, 2/3 and 5/4?

1 answer:

7 0

I’m not 100% sure but I think it’s because 20/25 can still be simplified further, while the other 3 can’t.

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BlackZzzverrR [31]

A) The first one equals to 5

Step by step:
Change all denominators to 28, what you do to the bottom you do to the top.

After adding simplify.

8 0

2 years ago

denis-greek [22]

Answer:

∠BPZ and ∠APZ

Step-by-step explanation:

These two angles share a common side and their non common side lies on a straight line.

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3 years ago

vaieri [72.5K]

Y - 3 = -2(x+5)
y - 3 = -2x - 10
+3. +3
y = -2x - 7

3 0

3 years ago

zzz [600]

Answer:

B) 4√2

General Formulas and Concepts:

Calculus

Differentiation

Basic Power Rule:

Parametric Differentiation

Integration

Arc Length Formula [Parametric]: $\displaystyle AL = \int\limits^b_a {\sqrt{[x'(t)]^2 + [y(t)]^2}} \, dx$

Step-by-step explanation:

Step 1: Define

Identify

$\displaystyle \left \{ {{x = t - cos(t)} \atop {y = 1 - sin(t)}} \right.$

Interval [0, π]

Step 2: Find Arc Length

[Parametrics] Differentiate [Basic Power Rule, Trig Differentiation]: $\displaystyle \left \{ {{x' = 1 + sin(t)} \atop {y' = -cos(t)}} \right.$
Substitute in variables [Arc Length Formula - Parametric]: $\displaystyle AL = \int\limits^{\pi}_0 {\sqrt{[1 + sin(t)]^2 + [-cos(t)]^2}} \, dx$
[Integrand] Simplify: $\displaystyle AL = \int\limits^{\pi}_0 {\sqrt{2[sin(x) + 1]} \, dx$
[Integral] Evaluate: $\displaystyle AL = \int\limits^{\pi}_0 {\sqrt{2[sin(x) + 1]} \, dx = 4\sqrt{2}$