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3 years ago

Question 7 a desk is on sale for 35% off. the sale price is $559 . what is the regular price?

Mathematics

1 answer:

marshall27 [118]3 years ago

8 0

559 x 0.65 = 363.35 $

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Curves: ) x2 + y2 + 3x + 5y - 18 = 0 at (1, 2);

Sergeeva-Olga [200]

Answer:

Hey, Something To help Check Out Symbolab its an online calc it has EVERYTHING thats how i do my math hope this helps

Step-by-step explanation:

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3 years ago

What is the length of the curve with parametric equations x = t - cos(t), y = 1 - sin(t) from t = 0 to t = π? (5 points)

zzz [600]

Answer:

B) 4√2

General Formulas and Concepts:

Calculus

Differentiation

Derivatives
Derivative Notation

Basic Power Rule:

f(x) = cxⁿ
f’(x) = c·nxⁿ⁻¹

Parametric Differentiation

Integration

Integrals
Definite Integrals
Integration Constant C

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: $\displaystyle AL = \int\limits^{\pi}_0 {\sqrt{2[sin(x) + 1]} \, dx = 4\sqrt{2}$

Topic: AP Calculus BC (Calculus I + II)

Unit: Parametric Integration

Book: College Calculus 10e

4 0

3 years ago

Can someone help with explain how to do these, with formulas or techniques?

Otrada [13]

I hope this helps you

6 0

3 years ago

Melissa had 56 pens and 37 pencils thanks. How many pencils did Melissa have?

lorasvet [3.4K]

Just by adding both of these, pens and also pencils, these actually both signify the same word, "pencils".

We do . . . .

$\boxed{56+37=3}$

(93) should be your correct answer!

7 0

3 years ago

Will Mark Brilliant!

pochemuha

Answer:

87.8

Step-by-step explanation:

I assume you know how to do this so I didn't show any steps. Have a nice night. :)

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3 years ago