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vladimir2022 [97]
3 years ago
6

help with number 2 please i have no idea how to do this. it would be very helpful if you can show the steps

Mathematics
1 answer:
zloy xaker [14]3 years ago
4 0
So in this case, we have to replace the known value.
y=3
y=-2x+3

3=-2x+3

Then we leave our unknown value alone.
\frac{3-3}{2}= x

In this case, our x value would be 0.

We check it...
3=-2(0)+3
3=0+3
3=3

So y=3 x=0

For the second one we have...
y=3x+2
y=-3x-4

For this we substitute the y in any of the equation...
3x+2=-3x-4

We move the unknown values to one side and the ones without unlown values to the other side...
3x+3x=-4-2

Then we solve
6x=-6

Then we leave the unknown value alone.
x=\frac{-6}{6}

Then solve for x.
x= -1

Then for our y value we return to one of the original equations and substitute the x value.
y=3x+2
y=3(-1)+2
y=-3+2
y=-1

y=-3x-4
y=-3(-1)-4
y=3-4
y=-1

So in this case we got that x= -1 and y= -1
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The midpoint of K is M(-3, -1). One endpoint is J(-12, -11). What are the coordinates of endpoint K?
Over [174]

Answer: 2 times sqrt(181) (approximately 26.9)

Step-by-step explanation:

First, we can plot these points on a graph. Then, we’ll use the Distance Formula to calculate the distance between the two points, which is sqrt(181).


Since the problem tells us that one of our coordinates is the midpoint of K, we know that the length of the segment we just calculated is 1/2 of K. We can multiply our answer to get that K is 2 times sqrt(181).

7 0
1 year ago
Read 2 more answers
7th grade math help me pleaseeee
Eduardwww [97]

Answer:

4x + 5y = 20

Step-by-step explanation:

4x + 5y = 20

5y = -4x + 20      (Subtract 4x to isolate 5y. Put the 4x in front of the 20)

y = -\frac{4}{5}x + 4         (Divide all by 5 to isolate y)

And then it's done and in slope-intercept form

-1< -\frac{4}{5} < 0        or -\frac{4}{5} is greater than -1 but less than 0

I hope this helped :)

3 0
3 years ago
at a restaurant the ratio of kids meal, how manys sold to adult meals sold was 9:2. if there were 81 kids meals sold, how many a
DedPeter [7]
9/2 = 81/a....9 kids meals to 2 adult meals = 81 kids meals to a adult meals
cross multiply
9a = 2(81)
9a = 162
a = 162/9
a = 18...so there were 18 adult meals
ratio is : 81/18 
6 0
3 years ago
What’s the answer???
77julia77 [94]

Answer:

"16.67"

Step-by-step explanation:

250÷15=16.67

5 0
3 years ago
Square EFGH is drawn on a coordinate plane. Diagonal FH is on the line y − 3 = negative one third(x + 9). What is the slope of t
Mashcka [7]

Option D: 3 is the slope of the diagonal GE

Explanation:

Given that EFGH is a square drawn on a coordinate plane.

Diagonal FH is on the line y-3=-\frac{1}{3} (x+9)

We need to determine the slope of the diagonal GE.

Since, EFGH is a square and FH and GE are diagonals of the square.

The diagonals FH and GE are perpendicular to each other.

Thus, the slope of GE can be determined using the formula,

m_1\cdot m_2=-1

where m_1 is the slope of FH and m_2 is the slope of GE

From the line y-3=-\frac{1}{3} (x+9) , the slope is given by

m_1=-\frac{1}{3}

Let us substitute the slope m_1=-\frac{1}{3} in the formula, we get,

-\frac{1}{3} \cdot m_2=-1

Multiplying both sides by -\frac{1}{3} , we have,

m_2=3

Thus, the slope of the diagonal GE is 3

Therefore, Option D is the correct answer.

6 0
3 years ago
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