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3 years ago

PLEASE ANSWERRRRRR

Mathematics

2 answers:

viva [34]3 years ago

8 0

Answer:

A. y=-2x+5

Step-by-step explanation:

y=mx+b , m represents slope (-2), b represents y intercept (5)

Schach [20]3 years ago

7 0

Answer:

A. y= -2x + 5

Step-by-step explanation:

If you plug in slope of -2 and y-intercept of (0,5) into the slope intercept form of y=mx+b then it's a. (0,5) is on the y axis at 5. The slope means down 2 right 1.

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How many solutions are there for the equation y = x + 2?

defon

Answer:

Infinite solutions.

Step-by-step explanation:

If we let x = 1 then y = 3, or if x = 3 y = 5 and so on.

We can substitute any number of values of x and find the corresponding value of y so there are infinite solutions.

5 0

3 years ago

Area of a triangle with points at (-9,5), (6,10), and (2,-10)

Ann [662]

First we are going to draw the triangle using the given coordinates.
Next, we are going to use the distance formula to find the sides of our triangle.
Distance formula: $d= \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}$

Distance from point A to point B:
$d_{AB}= \sqrt{[6-(-9)]^2+(10-5)^2}$
$d_{AB}= \sqrt{(6+9)^2+(10-5)^2}$
$d_{AB}= \sqrt{(15)^2+(5)^2}$
$d_{AB}= \sqrt{225+25}$
$d_{AB}= \sqrt{250}$
$d_{AB}=15.81$

Distance from point A to point C:
$d_{AC}= \sqrt{[2-(-9)]^2+(-10-5)^2}$
$d_{AC}= \sqrt{(2+9)^2+(-10-5)^2}$
$d_{AC}= \sqrt{11^2+(-15)^2}$
$d_{AC}= \sqrt{121+225}$
$d_{AC}= \sqrt{346}$
$d_{AC}= 18.60$

Distance from point B from point C
$d_{BC}= \sqrt{(2-6)^2+(-10-10)^2}$
$d_{BC}= \sqrt{(-4)^2+(-20)^2}$
$d_{BC}= \sqrt{16+400}$
$d_{BC}= \sqrt{416}$
$d_{BC}=20.40$

Now, we are going to find the semi-perimeter of our triangle using the semi-perimeter formula:
$s= \frac{AB+AC+BC}{2}$
$s= \frac{15.81+18.60+20.40}{2}$
$s= \frac{54.81}{2}$
$s=27.41$

Finally, to find the area of our triangle, we are going to use Heron's formula:
$A= \sqrt{s(s-AB)(s-AC)(s-BC)}$
$A=\sqrt{27.41(27.41-15.81)(27.41-18.60)(27.41-20.40)}$
$A= \sqrt{27.41(11.6)(8.81)(7.01)}$
$A=140.13$

We can conclude that the perimeter of our triangle is 140.13 square units.

3 0

3 years ago

Which graph shows the solution to the system of linear inequalities?

Brilliant_brown [7]

Answer:

this is answer

Step-by-step explanation:

To graph a linear inequality in two variables (say, x and y ), first get y alone on one side. Then consider the related equation obtained by changing the inequality sign to an equality sign. The graph of this equation is a line. If the inequality is strict ( < or > ), graph a dashed line.

4 0

2 years ago

Solve for the variable: 2x - 28 = 16

svlad2 [7]

2x = 44
44/2 = x
X= 22

4 0

3 years ago

Read 2 more answers

38=x+10+9-3<br>I don't get this question

Lilit [14]

Answer:

so is that all it says, if its not thats not a question because its already answered