Solve the sytems of equations by substitution
x=-4y
x+5y=2

Answers

Answer 1

Answer: Y=2, put -4y in for do to the second equation, and then it's technically 5-4 so then you have 1y=2 then you move the 1 to the other side by dividing 2 by 1.

Answer 2

Answer: x = -4y x + 5y = 2
-4y +5y = 2

*add -4y and 5y*
y = 2

x = -4(2)

*Multiply -4 and 2*
x = -8

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Which of the following statistical measures is least appropriate for describing the data set shown below? 1, 5, 5, 5, 6, 6.5, 7, 30

mean
mode
median

Answers

arrange data set in ascending order

1, 5, 5, 5, 5, 6, 6, 7, 30

mean = 7.78
mode = 5
median = 5

The least appropriate measure for describing the data set is MEAN. This is because it is affected by the outlier, 30.

Answer:

Short answer shorter, its A: mean

Step-by-step explanation:

There goes my hopes for Virtuoso rank....What are the zeros of the function y = x2 + 10x – 171, and why?

A) The zeros are x = –19 and x = 9 because in factored form, the function is y = (x – 19)(x + 9)

B) The zeros are x = –19 and x = 9 because in factored form, the function is y = (x + 19)(x – 9).

C) The zeros are x = 19 and x = –9 because in factored form, the function is y = (x – 19)(x + 9).

D) The zeros are x = 19 and x = –9 because in factored form, the function is y = (x + 19)(x – 9).

Answers

y = x^2 + 10x - 171
y = (x - 9)(x + 19)

x - 9= 0 x + 19 = 0
x = 9 x = -19

Answer B covers all requirements... the factored form is
y= (x + 19)(x - 9)
and the zeros are -19 and 9

Which function below represents the arithmetic sequence 3, 7, 11, 15...? a) f(n) = 4 + 3(n - 1)

b) f(n) = 4 + 3n

c) f(n) = 3 + 4n

d) f(n) = 3 + 4(n - 1)

Answers

d) f(n) = 3 + 4(n-1)

3 = 1st term
4 = common difference among the terms
n = term number you are looking for.

To check: 3, 7, 11, 15, ...

f(1) = 3 + 4(1-1) = 3 + 4(0) = 3 + 0 = 3
f(2) = 3 + 4(2-1) = 3 + 4(1) = 3 + 4 = 7
f(3) = 3 + 4(3-1) = 3 + 4(2) = 3 + 8 = 11
f(4) = 3 + 4(4-1) = 3 + 4(3) = 3 + 12 = 15

Answer:

its d

Step-by-step explanation:

An inscribed angle is an angle formed by two chords which share an endpoint and pass through the center.True or False

Answers

The correct answer is:

False.

Explanation:

An inscribed angle is an angle formed by two chords in a circle which have a common endpoint, which is the vertex of the angle.

This vertex does not have to be the center of the circle.

The chords that make up the sides of the angle do not have to go through the center of the circle.

Answer:

False

Step-by-step explanation:

The vertex doesn't have to be in the center of the circle.

Which graph below represents an inequality that begins with y ≤

Answers

To represent an inequality that begins with y ≤, we need to find a graph that shows all the points where y is less than or equal to a certain value.

Among the given options, the correct graph would be the one where the y-values are shaded below a boundary line.

Unfortunately, I can't see the options you're referring to, so I'm unable to point out the specific graph. However, when choosing the correct graph, look for the shading below a boundary line or a curve that represents the inequality y ≤ some value.

What two numbers multiply to get 31 and add to get 12