MATHEMATICS HIGH SCHOOL

A quadrilateral hasno pairs of parallel
sides. What two
Shapes could it be?
(Not trapezium/trapezoid
kite, rhombus)

Answers

Answer 1
Answer:

Answer:

parallelism

Step-by-step explanation:

I'm just looking also the answer!

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Solve for x. 5x2 – 45 = 0

A.
{3}

B.
{3, –3}

C.
{9, –9}

D.
{9}

Answers

5x^2-45=0
factor 5 out
5(x^2-9)=0
diff 2 perfec squares
5(x-3)(x+3)=0
set zero
x-3=0
x=3

x+3=0
x=-3

x=-3 or 3

B
Hi there! 5x²-45=0, add 45 to both sides, 5x²-45+45=0+45=5x²=45. Divide both sides by 5, 5x²/5=45/5, 45/5=9. So, we have x²=9. we have to find the square root of 9. The square root of 9 is 3*3 because 3*3=9. We have two solutions, the first solution is x=3 and the other solution is x=-3. X=3 and x=-3 can be combined and we get {3,-3}. Therefore, your answer is B. {3,-3}

How many solutions does x^2 - 2x +1 = O have?

Answers

Answer:

1

Step-by-step explanation:

(X-1)(X-1) are your factors which only give you one solution of x=1

Find the vertex, focus, directrix, and focal width of the parabola: -1/40x^2=y

Answers

for
(x-h)^2=4p(y-k)
vertex is (h,k)
distance from vertex to directix=p=distance from vertex to focus
|4p|=focal width

remember, focus is on the side of the parabola where it opens and directix is at the back
when p is negative, it opens down
when p is positive, it opens up

look at equation
-1/40(x-0)^2=(y-0)
times -40 to both sides
(x-0)^2=-40(y-0)
(x-0)^2=4(-10)(y-0)
vertex=(0,0)
p=-10,it's negative so it opens down

focus is 10 units below vertex (y direction)
focus=(0,-10)

diretix is 10 above
directix is y=10

focal width=|4p|=|4(-10)|=|-40|=40




vertex=(0,0)
focus=(0,-10)
directix is y=10
focal width=40 units

How can you solve the literal equation y-3x=13

Answers

So to begin, you need to find x and y. If you have answer options, plug those in. If you don't, your toast. Just kidding :) 
So, your answer would be y3=13. I think you can handle the rest. 3 * what equals 13? 

What does a residual value of –0.8 mean in reference to the line of best fit?

Answers

Answer:

Residual value of -0.8 means the actual point is 0.8 units below the best fit line.

Step-by-step explanation:

The difference between the observed value of the dependent variable and the predicted value is called the residual.

Mathematically,

e = y -\hat{y}

where,

e = residual,

y = observed value,

ŷ = predicted value.

When the residual is negative, the data point is below the graph or best fit line.

Residual value of -0.8 means the actual point is 0.8 units below the best fit line. It also means that the actual value is 0.8 lesser than the predicted value.
The given point is 0.8 units below the line of best fit 

Can someone help me? ​

Answers

Answer:

i dont know this but use the app Socratic. You can download it on your phone. Take a picture of the problem, crop it then press enter. It will pull up a bunch of websites with the answer and teach you how to do the problem. HOPE THIS HELPS!!!! mark brainliest plz

Step-by-step explanation:
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