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# Recently Posted Questions in Mathematics

Which ordered pair is a solution of the equation 2x − y = 9 (-4,1) (-2,5) (5,1) (6,-3)

In order to confirm if which ordered pair is a solution of the given equation above, we can just simply plug in the values.
So based on my solution, the correct answer would be the third option: (5,1)
So let us try to plug in the values.
2(5) - 1 = 9
10 -1 = 9
9 = 9

What is the range of the function f(x) = 3x2 + 6x – 9

I have a solution here however with a slight change in the equation:

f(x)=3x^2-6x+1

My solution is:

The domain is all real numbers--there are no restrictions like a square root or variable in the denominator

this is a U shape parabola and you want to find the bottom point, it is at the vertex

x=-b/2a =- (-6) /2 (3) =1
f(1) =3(1)^2 -6(1) +1 =3-6+1 =-2
the minimum is (1, -2)
so the range is all real numbers >= -2

By examining my solution, you could just answer the problem on your own! I hope it helps!

Find the multiplicative inverse of 6 + 2i.

The solution to the problem is as follows:

First thing to do is get rid of the i. Multiplying by 6 - 2i will do this

( 6 + 2i)(6 - 2i) = 6^2 - (2i)^2 = 36 - 4(-1) = 36 + 4 = 40

Dividing by 40 gets you 1

(6 + 2i) (6-2i)/40 = 1

The answer is (6 - 2i)/40 = (3 - i)/20

I hope my answer has come to your help. God bless and have a nice day ahead!

The following data values represent a population. What is the variance of the values? 8, 10, 14, 12 A.22 B.11 C.5 D.10

Variance is calculated by taking the differences between each number in the set and the mean, squaring the differences (to make them positive) and dividing the sum of the squares by the number of values in the set. We do as follows:

Mean = 8+10+14+12 / 4 = 11

Variance = (8-11)^2 +
(10-11)^2 + (12-11)^2 + (14-11)^2 / 4
Variance = 5 <-------OPTION C

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Solve the equation for y 2x+6y=13

So here is how we are going to solve for y for the given equation above:
2x+6y=13
Next, transfer 2x to the right side and it will look like this:
6y=13-2x
Now, divide both sides by 6, and it will look like this:
y=13-2x
--------
6
So, this is the final answer for y.

Which one is bigger 60% of 90 or 1/2 pa 100?

60% of 90 = 90 * 0.60 = 54
1/2 of 100 = 100/2 = 50

So, as 54 > 50, 60% of 90 > 1/2 of 100

Hope this helps!

Which of the binomial is a factor of this trinomial x2-7x-44?

I hope this helps you

x^2-7x-44

x -11

x +4

(x-11)(x+4)

Which is the better buy, 6 bagels for \$3.29 or 8 bagels for \$4.15?

Well, we'd want to calculate the price of 1 bagel first.

To see which is better: divide \$3.29 by 6 and then divide \$4.15 by 8 and see which has the lowest answer.

The first option rounds off to \$0.55 for one bagel. The second option rounds off to \$0.52 for one bagel.

The second option is the best.

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Which is greater one mile or one kilometer?

One mile is greater than one kilometer.

There relation are: 1 M = 1.6 Km

Hope this helps!

Which is a factor of 18?

Factors of 18: 1 2 3 6 9 18

hope this helps you

What is one fifth of twelve thousands?

Two thousand four hundred

What is another way to write 250,000 ml?

Another way to write it would be 250 liters.

hope this helps you

What is 20 time 4 equal?

20 x 4 = 80

hope this helps you

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What is 1.892 to the nearest tenth?

We need to look at the number after the tenth, called the 'hundredth'. If the hundredth is 5 or above, we must change the hundredth to 0 and make the tenth one higher.

In this case, the hundredth is 9 and is above 5, so it becomes 0 and the tenth moves higher to become 9.

The number will now be 1.9

What is 1 1/2 plus 2/3?

It would be 1 7/6 which can be simplified to 2 1/6

hope this helps you

What is -42 minus 10 equals -52?

What fraction is equal to 7/10?

14/20 is a equal fraction

What do you add to 4 and 2/9 to make 7?

2 and 7/9 is the answer

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What do you add to 3 and 4/7 to make 6?

2 and 3/7 is the answer

The y-coordinate of the y-intercept is the _____ term in the equation of the line.

For the answer to the missing term in the question above, the question is as simple as its answer. The right answer is constant.
I hope my answer helped you. Feel free to ask more questions. Have a nice day!

The soccer team voted on what they wanted to eat. there are 20 members on the team. six members voted for pizza, 10 voted for chicken, and the rest voted for hot dogs. which ratio represents the number of votes for hot dogs to chicken

Since there are 20 members in the soccer team. Then six members voted to eat pizza and 10 member voted to eat chicken and the rest is hotdog

Member voted for hotdog = 20 – 10 – 6 = 4

Ratio for hotdog to chicken is 10 : 4 or 5:2

The price of a cup of coffee was \$2.65 yesterday. today, the price fell to \$2.50 . find the percentage decrease. round your answer to the nearest tenth of a percent.

We must find the difference between prices. \$2.65 - \$2.50 = \$0.15. Now we need to calculate what percent \$0.15 is of \$2.65. It is 5.7%! The price decreased, so it is a 5.7% decrease!

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