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3 years ago

How does finding the percent as a rate per 100 help you find the number of responses out of 200

Mathematics

1 answer:

gulaghasi [49]3 years ago

7 0

Because all I have to do is multiply by 2

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3 3/20 as a decimal number

denpristay [2]

3.15, I did this by calculating the decimal of the fraction then just adding the 3

3 0

4 years ago

A triangle has lengths of 12 cm, 14 cm, and 18 cm. What is the perimeter of the triangle in inches? ( 1 cm = 0.4 in.)

Misha Larkins [42]

Answer:

15.8 in

Step-by-step explanation:

12cm x .4 = 3 in

14 x .4 = 5.6

18 x .4 = 7.2

3 + 5.6 + 7.2 = 15.8 in

Hope that helps!

-Sabrina

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3 years ago

#37. What is the next step when solving the equation sin (2x) - sin (x) = 0

alina1380 [7]

sin(2x) - sin(x) = 0

Expand the first term using the double angle identity:

2 sin(x) cos(x) - sin(x) = 0

Factor out sin(x) :

sin(x) (2 cos(x) - 1) = 0

This leaves you with 2 cases that can be solved separately:

sin(x) = 0 or 2 cos(x) - 1 = 0

sin(x) = 0 or cos(x) = 1/2

[x = 2nπ or x = π + 2nπ] or [x = π/6 + 2nπ or x = 5π/6 + 2nπ]

(where n is any integer)

5 0

3 years ago

Use an array or an area model to illustrate how to solve this equation. Then, explain each part of the

valentina_108 [34]

Answer:

870

Step-by-step explanation:

Array model shown below along with description (at the bottom).

3 0

4 years ago

Write a formula that will help james find the price per milliliter for each brand

navik [9.2K]

Answer:

$z=\frac{x}{y}$

Step-by-step explanation:

The complete question is

James has to buy juice for his class party. there are several brands of juice at the store, and each container is a different size and price. write a formula that will help James find the price per milliliter for each brand.

x=price of juice

y=number of milliliters in carton

z=price per milliliter

we know that

The price per milliliter for each brand, is the same that the unit rate

To find out the unit rate , divide the price of juice by the number of milliliters in carton

$z=\frac{x}{y}$

7 0

3 years ago