MATHEMATICS HIGH SCHOOL

Solve for x and y simultaneously 2 x + y =5 and 4 x + 3y =9​

Answers

Answer 1
Answer:

x=3

y=-1

I got my answer using  process of elimination.
Answer 2
Answer:

Answer:

x = 3, y = - 1

Step-by-step explanation:

2x + y = 5 → (1)

4x + 3y = 9 → (2)

Multiplying (1) by - 2 and adding to (2) will eliminate the x- term

- 4x - 2y = - 10 → (3)

Add (2) and (3) term by term to eliminate x

0 + y = - 1

y = - 1

Substitute y = - 1 into either of the 2 equations and solve for x

Substituting into (1)

2x - 1 = 5 ( add 1 to both sides )

2x = 6 ( divide both sides by 3 )

x = 3

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Ken drew a pair of intersecting rays and marked the angle between them.Which of these statements best compares the pair of intersecting rays with the angle?
-The rays and the angle have two endpoints each.
-The rays and the angle have their lines extending in opposite directions.
-The rays have a number of points lying on them and the angle has only one point lying on it.
-The rays extend infinitely and the angle is made by the rays which have a common endpoint.
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Answers

The best and most correct answer among the choices provided by your question is the fourth choice.

The rays extend infinitely and the angle is made by the rays which have a common endpoint.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

Answer:

-The rays extend infinitely and the angle is made by the rays which have a common endpoint.

Step-by-step explanation:

A ray starts from one point and extends in one direction forever.

An angle is the space between two intersecting lines at or close to the point where they meet. In this case two rays intersect each other at one point

Please help and NO LINKSTo conduct a survey about the type of phone service most people in Greenville prefer, 10 different blocks in the neighborhood are chosen. On these 10 blocks, 10 houses are selected at random, and then one resident of each of those houses is interviewed. This type of sampling method is

A.) simple random sampling.
B.) stratified sampling.
C.) systematic random sampling.
D.) cluster sampling.

Answers

Answer:

Please help and NO LINKS

Please help and NO LINKSTo conduct a survey about the type of phone service most people in Greenville prefer, 10 different blocks in the neighborhood are chosen. On these 10 blocks, 10 houses are selected at random, and then one resident of each of those houses is interviewed. This type of sampling method is(A)

Step-by-step explanation:

(Ihopethishelps)(BRAINLEISTPLEASE)❤☺️☻♨️

Answer:

Cluster sampling

Step-by-step explanation:

AI-generated answer

The sampling method described in the question is cluster sampling. In cluster sampling, the population is divided into clusters or groups, and then a random sample of clusters is selected. In this case, the blocks in the neighborhood are the clusters.

Here is a step-by-step explanation of why this is cluster sampling:

1. The first step is to divide the population into clusters. In this case, the population is the neighborhood, and the clusters are the different blocks within the neighborhood.

2. Next, a random sample of clusters is selected. The question states that 10 different blocks in the neighborhood are chosen. This means that the researchers randomly selected 10 blocks from the neighborhood.

3. Once the clusters are selected, a sample is taken from each cluster. The question states that on these 10 blocks, 10 houses are selected at random. This means that within each of the 10 selected blocks, 10 houses are chosen randomly.

4. Finally, the residents of each selected house are interviewed. This means that every resident of each of the selected houses is interviewed to gather information about the type of phone service they prefer.

Overall, this sampling method is cluster sampling because the population is divided into clusters (blocks), a random sample of clusters (10 blocks) is selected, and then a sample is taken from each selected cluster (10 houses on each block).

What is the answer to 3 × 1 × 5/3

Answers

(3)(1)(5)/3 = (3)(5)/3
                 = 15/3 
                 = 5

Therefore, the answer is five! I hope this helps!
ok the answer to 3*1*5/3 is 5 

Find the three cube roots of the complex number 8i. Give your answers in the form x + iy

Answers

8i is:
 z = 8(cos(90) + i sin(90)) ; now take the 1/3 power of it.

When we take this to a normal integer power of 3 we get:

z^3 = 8^3(cos(90*3) + i sin(90*3)) right? its the same for rational exponents as well.

z^(1/3) - 2(cos(90/3) + i sin(90/3))

90/3 = 30; the cos(30)=sqrt(3)/2 and the sin(30) = 1/22(sqrt(3)/2 + i 1/2) = sqrt(3) + 1i should be one of the cube roots.

(sqrt(3) + i)^2 = 2 +2sqrt(3) i
(sqrt(3)+i) (2 +2sqrt(3)i
2sqrt(3) + 6i +2i -2sqrt(3) = 8i

Can someone please help me ASAP?

I will give brainliest if it’s correct

Answers

Answer :

a {}^(m) . \: a {}^(n) = a {}^(m + n)

Explanation :

when we multiply two values in scientific notation with the same base,their powers get added .

a ruby throated hummingbird beats its wing 159 times in 3 seconds.how many times does the ruby throated humming beat its wings per second

Answers

159 divided by 3 will give you the answer of 53.
159 divided by 3 because you have to find out how many times the bird flaps his wings in a second so by dividing that you will get your answer here look 159 divided by 3 will equal 53 and that is the answer the work to show how you got the answer is just dividing 159 by 3 :)
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