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dybincka [34]
3 years ago
9

Y

Mathematics
1 answer:
Natalija [7]3 years ago
7 0

Answer:

30%

Step-by-step explanation:

change/orginal is the formula used for percentage change. the change is 9. the original is 30. 9/30 = 0.3. Multiply by 100 to get a percentage.

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{(-3, 7.5) , (-2, 10) , (-1, 12.5)} arithmetic or geomatic
marysya [2.9K]

Answer:

arithmetic

Step-by-step explanation:

The points fall on a straight line. They won't do that for a geometric sequence.

___

Normally the terms of either sort of sequence are numbered with counting numbers: 1, 2, 3, .... Your x-values are negative, so are obviously not term numbers of a sequence. The differences of x-values are 1, and the differences of y-values are 2.5, so we know the x- and y-values are linearly related. That relationship can be expressed in point-slope form by ...

y = 2.5(x +1) +12.5

which can be simplified to

y = 2.5x +15

__

The arithmetic sequence with first term 17.5 and common difference 2.5 would be described by this same equation.

4 0
3 years ago
Thirty-three students went out for junior high football. How many ways can the coach create a lineup of 11 players?
Irina18 [472]
The coach can line up 3 different ways.
5 0
3 years ago
Which matrix represents the system of equations shown below? 3x-5y=12 4x-2y=15
tatuchka [14]

Answer:

\left[\begin{array}{ccc}3&-5  &|12\\4&-2  &|15\\\end{array}\right]

Step-by-step explanation:

When making a matrix of two equations with the variables x and y, the result will be a matrix with three columns:

  • a column for the values of x in each equation
  • a column for the values of y in each equation
  • a column for the independent values of each equation

since our system of equations is:

3x-5y=12\\ 4x-2y=15

we can see that the value for x in the first equation is 3 and in the second equation is 4, thus the first column will have the numbers 3 and 4:

\left[\begin{array}{ccc}3&&\\4&&\\\end{array}\right]

Now for the values of y we hvae -5 in the first equation and -2 in the second equation, we update the matrix with another column with the values of -5 and -2:

\left[\begin{array}{ccc}3&-5&\\4&-2&\\\end{array}\right]

Finally, the last column is the independent values of each equation (or the results) in the first equation that number is 12 and in the second equation is 15, thus the matrix is:

\left[\begin{array}{ccc}3&-5&12\\4&-2&15\\\end{array}\right]

usually there is a line separating the columns for the values of x and y, and the independent values:

\left[\begin{array}{ccc}3&-5  &|12\\4&-2  &|15\\\end{array}\right]

this is the matrix of the system of equations

6 0
3 years ago
PLEASE HELPPPPP..........!!!
alisha [4.7K]
I can’t see it well...like it’s blurring
7 0
3 years ago
Winona wants to add the numbers 1 2 + 2 3 + 3 2 . She first added 1 2 and 3 2 , then added the result to 2 3 . What reason suppo
love history [14]

Answer:

Associative property

Step-by-step explanation:

Given

½ + ⅔ + 3/2

Required

What reason supports Winona's process?

This question could be better answered, if supported with options; however, since there's none, I'll provide my answer on a general rule.

Winona's process can be supported by associative property of algebra which implies that

a + b + c = (a + b) + c = a + (b + c) = (a + c) + b

So, when Winona added ½ to 3/2, it is represented by a + c

And when she added the result to ⅔, it is represented by (a + c) + b

Hence, we can conclude that Winona applied associative property

5 0
3 years ago
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