Find the degree of the angles whose sine is -1/2 (that's a fraction)

Miriam and Salina are twins and their sister Rohana is 2 years older than them. The total of their ages is 32years .Find their a

Fudgin [204]

Answer:

644

Step-by-step explanation:

8 0

3 years ago

To write 11x^2+17x-10 in factored form, Diego first listed pairs of factors of -10.

Liono4ka [1.6K]

(11x+10)(x+-1)
(X+1)(11x+-10)

4 0

3 years ago

There are 30 boys in a sporting club. 20 of them play hockey and 15 play volleyball. Each boys plays at least one of the two gam

SVETLANKA909090 [29]

Answer:

5 boys play all the two games

25 boys play only one game

Step-by-step explanation:

Sets

There are two sets defined in the question: one for the boys who play hockey (H) and the other for the boys who play volleyball (V).

All the boys play at least one of the two games, so no elements are outside both sets.

There are 30 boys in total. 20 of them play hockey and 15 play volleyball. Since the sum of both numbers is greater than the total of boys, the difference corresponds to the boys who play both games.

Thus 20 + 15 - 30 = 5 boys play both games

Given that 5 boys are shared by both sets, from the 20 playing hockey, 15 play ONLY hockey. From the 15 boys playing volleyball, 10 play ONLY volleyball.

Thus 15 + 10 = 25 boys play only one game.

The Venn diagram is shown in the image.

7 0

3 years ago

It is clear that a large survey is an appropriate method for a study of marriage patterns among college students. What will the

Ulleksa [173]

Answer:

Here the sample is the college students, and the researcher want's to do a survey to obtain information about marriage patterns.

Then, the ideal sample will be constituted of students of both genders, of different ideologies, of different social classes, of different religions, etc.

Then the thing that the researcher needs to do is:

Define the size of the sample

Assign to each student a unique number.

using a random number generator, generate enough different numbers to fill the sample.

Each of these numbers corresponds to a unique student, so now you have a complete sample of random selected students.

This sample can not be biased in any way.

7 0

3 years ago

Complete the square x^2+18x+_

kipiarov [429]

Answer:

x^2 + 18x + 81 complete's the square.

Step-by-step explanation:

y = [x^2 + 18x + (18/2)^2 ] - (18/2)^2

y = [x^2 + 18x + 81] - 81

y = (x + 9)^2 - 81 This is just to make the completion of the square accurate.

You can't just add something to an expression. You have to balance it out.

3 0

3 years ago

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