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2 years ago

Find the exact value of the given expression using a sum or difference formula.

1 answer:

5 0

sin (a - b) = sinacosb - sinbcosa
1) sin345° = sin (360 - 15) = sin360cos15 - sin15cos360= 0-sin15 *1=
sin345° = - sin15,

2) cos(11π) /12= - cos pi / 12 = cos ( - 4pi/12 +3pi/12)= cos (- pi/3 + pi/4) =
cos (-pi/3) cos pi/4) + sin (-pi/3) sin( pi/4) = sqrt6 /4 - sqrt2/ 4

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$5,000 at a simple annual interest rate of 6.5% for 5 years. What is the total amount of interest Ms. Lee must pay?

MaRussiya [10]

Answer:

$6625

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Simple Interest Rate Formula: A = P(1 + rt)

P is principle amount
r is rate
t is time (in years)

Step-by-step explanation:

Step 1: Define

Identify variables

P = 5000

r = 6.5% = 0.065

t = 5

Step 2: Find Interest

Substitute in variables [Simple Interest Rate Formula]: A = 5000(1 + 0.065 · 5)
(Parenthesis) Multiply: A = 5000(1 + 0.325)
(Parenthesis) Add: A = 5000(1.325)
Multiply: A = 6625

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2 years ago

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2 years ago

Read 2 more answers

Write an expression for the following

ycow [4]

Answers:
A) 14 -P
B) (D+F) ^ 8
C) (5x2) + 5
D) C + 6

Enjoy!

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1 year ago

Read 2 more answers

At what point should an open circle be drawn (-1,0) (0,0) (0,1) (1,0)

alisha [4.7K]

I think the answer would be (0,0).

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3 years ago

A community pool that is shaped like a regular pentagon needs a new cover for the winter months. The radius of the pool is 20.10

boyakko [2]

Answer:

$960.42\text{ ft}^2$

Step-by-step explanation:

Please find the attachment.

We have been given that a community pool that is shaped like a regular pentagon needs a new cover for the winter months.

To find the area of community pool we will use area of pentagon formula.

$\text{Area of pentagon}=\frac{1}{2}a*p$ , where, a represents the apothem or perpendicular distance from the center of the pentagon and p represents perimeter of pentagon.