Ask question

Ask question

All categories

3 years ago

12

Kathleen bought 4 dresses that each cost the same amount and pair of jeans that cost $40. The items she bought cost a total of $

160 before tax was added. Write and solve an equation to find d the cost of each dress

1 answer:

stepan [7]3 years ago

3 0

Each dress would be $30 because, if you do 160-40 = 120 then 120 divided by 4 = 30. So that’s the answer 30

You might be interested in

Prove that sin(Π÷14)sin(3Π÷14)sin(5Π÷14)=2

Oxana [17]

Answer:

The correct prove will be:

$sin(\frac{\pi }{14})sin(\frac{3\pi }{14})sin(\frac{5\pi }{14})$ $= \frac{1}{8}$

Step-by-step explanation:

$sin(\frac{\pi }{14})sin(\frac{3\pi }{14})sin(\frac{5\pi }{14})$

Multiply and Divide by $2cos(\frac{\pi }{14})$

= $\frac{2sin(\frac{\pi }{14})cos(\frac{\pi }{14})sin(\frac{3\pi }{14})sin(\frac{5\pi }{14})}{2cos(\frac{\pi }{14})}$

⇒ Let $\frac{\pi }{14}$ = Ф and 7Ф = $\frac{\pi }{2}$

= sin2Ф sin3Ф sin5Ф ÷ 2cosФ

= 1/2(2sin2Фsin5Ф)sin3Ф ÷ 2cosФ

= (cos3Ф - cos7Ф) sin3Ф ÷ 4cosФ

= 1/2(2cos3Ф sin3Ф) ÷ 4cosФ ∵cos7Ф = 0

= sin6Ф ÷ 8cosФ

= sin(7Ф - Ф) ÷ 8cosФ

= (sin7ФcosФ - cos7ФsinФ) ÷ 8cosФ ∵sin7Ф = 1

= cosФ ÷ 8cosФ

= 1/8

Hence, The correct prove will be:

$sin(\frac{\pi }{14})sin(\frac{3\pi }{14})sin(\frac{5\pi }{14})$ $= \frac{1}{8}$

Keywords: prove, sinФ, cosФ

Learn more about trigonometric functions from brainly.com/question/7331447

#learnwithBrainly

4 0

3 years ago

Is y=7x-3 have a proportional relationship

Black_prince [1.1K]

Answer:

my name is mmmmmmm

Step-by-step explanation:

hehehehe

8 0

4 years ago

Helppppppp me?????????????

egoroff_w [7]

Answer:

last option bottom right

x can be equal or greater than -2

4 0

3 years ago

The scale of a map is 1/2 inch = 40 miles. If 2 cities are 1 1/2 inches apart on the map, how many miles apart are they from eac

damaskus [11]

Answer:

120 miles apart I believe

Step-by-step explanation:

hope this helps plz mark brainliest

8 0

3 years ago

Explain why it is important to know if a time is in the am or in pm when figuring out how much time has lapsed

Oksi-84 [34.3K]

Because time goes from am to pm

8 0

3 years ago