Find sin(7pie/4) using exact values

Answers

Answer 1

Answer: $sin( ( 7\pi )/(4) )=-sin(2 \pi - ( 7\pi )/(4) )=-sin ( \pi )/(4) =- (1)/( √(2) )$

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An Apple iPad sells for $699.00 on eBay. The markup is 30% on cost. What is the total cost of the iPadsold on eBay?
11 2 3 4-3 -2 -N-1-2The equation of this line isy = -x - 1. Which of thefollowing shows a way thatwe could change theequation to make theline steeper?NA. y = -x + 5B. y = -4x - 1C. y = -x - 3
Eliminate the y in the following system of equations. What is the result when you add the two equations?x+y=23x-4y=27A.7x=29B.x=-23C.7x=35D.4x=29
About what percentage of the data lies within 2 standard deviations of the mean in a normal distribution?
40 Jenny is buying gifts for her family. So far she has spent $45,95, and she has one more gift to buy. She started with a total of $60 to spend on all of her gifts Write an inequality that shows how much she can spend on the final gift

Brainly awnser fast pls!!Simplify the following expression by combining like terms.
3x + 2x - 5

Answers

Answer:

5x-5

Step-by-step explanation:

Answer:

5−5

HOPE THIS HELPS :)

What is the arithmetic mean of the following numbers?
9, 10, 6, 5, 6

Answers

Answer: 7.2

Step-by-step explanation: Mean= (sum of observations/number of observations)

=(5+6+6+9+10)/5

=(36)/5

=7.2

Given the function f(x) = -4x² + 7x, find f(5).

Answers

Answer:

f(5) = -65

Step-by-step explanation:

f(x) = -4x² + 7x f(5)

f(5) = -4(5)² + 7(5)

f(5) = -4(25) + 35

f(5) = -100 + 35

f(5) = -65

a section in a stained glass window is shaped like a trapezoid. the top base is 4 centimeters and the bottom base is 2.5 centimeters long. if the area of the section of glass is 3.9 square centimeters. how tall is the section

Answers

Hello, so the equation for the area of a trapezoid is A = (a+b)*(h/2)

In which, a is one of the bases, b is the other base, and h is the height. A is the Area. If you wanna solve for height, rearrange the equation to what h equals.

First divide (a+b) from both sides
A/(a+b) = h/2

Now multiply 2 on both sides

2(A/(a+b)) = h

Now you have it rearranged equal to just h. Plug in the values now.

2(3.9/(4+2.5)) = h

2(3.9/(6.5)) = h

2(.6) = h

1.2 = h

The section is 1.2 centimeters tall.your welcome

Suppose that there are two types of tickets to a show: advance and same-day. The combined cost of one advance ticket and one same-day ticket is $35
. For one performance,
40
advance tickets and
30
same-day tickets were sold. The total amount paid for the tickets was
$1250
. What was the price of each kind of ticket?

Answers

$Advance=x$

$Same.day=y$

$x+y=35$ so $x=35-y$

$40x+30y=1250$

$40(35-y)+30y=1250$

$-10y=-150$

$y=15$

$x+15=35$

$x=20$

Cost for Advance ticket: $20
Cost for Same-day ticket: $15

Let's set up variables and equations for things that we know from the question, with a standing for advance tickets, and s standing for same day tickets.

$40a + 30s = 1250$
$a + s = 35$

Let's solve it through substitution. Isolate either variable, a or s. I'll choose to isolate a. Subtract s from both sides.

$a = -s + 35$

Plug the new knowledge into the first equation, since we now know the value of a

$40(-s +35) + 30s = 1250$ .

Distribute the 40 to the -s and 35

$-40s + 1400 + 30s = 1250$

Combine the negative and positive s

$-10s + 1400 = 1250$

Subtract 1400 from both sides.

$-10s = -150$

Divide both sides by -10

$s = 15$

The total price of an advanced ticket and same-day ticket is 35, and we know the value of a same-day ticket, so the price of an advance ticket must be 20.

The final answers are:
advanced ticket = 20
same day ticket = 15

Martha is covering kitchen shelves with shelving paper. She has 6 shelves that are each 1 3 4 feet long. She buys 13 1 4 feet of shelving paper of the correct width. Which equation can be used to determine how much paper she will have left over?

Answers

its 1314 divided by 6.

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