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3 years ago

7

What is the scientific notation of 1/3

1 answer:

In-s [12.5K]3 years ago

7 0

3.3333333333 × 10-1

:)

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Find the distance between V(4,4) and X(5,8).<br> Round to the nearest tenth, if necessary.

Margarita [4]

Answer:

$(x_{2} - x_{1})^{2} + (y_{2} - y_{1})^{2} = c^{2}$

$V(x_{1}, y_{1}) = V(4, 4)\\X(x_{2}, y_{2}) = V(5, 8)\\$

$(5-4)^{2} + (8-4)^{2} = c^{2}\\1^{2} + 4^{2} = c^{2}\\$

$1+16=c^{2}\\17= c^{2}\\c = \sqrt{17}$

Step-by-step explanation:

Start by plotting your points.

If the line is diagonal, then realize you can make a triangle with the line connecting the two points being the hypotenuse.

Use Pythagorean Theroem to solve.

3 0

3 years ago

I have no idea how to do this stuff.

kenny6666 [7]

Answer: $y=2x^{2}-5x+7$

Step-by-step explanation:

The quadratic equation in its standard form is:

$y=ax^{2}+bx+c$

Now, we are given 5 points of the parabola (if you graph a quadratic equation you will have a parabola), however we only need to choose three points to find the coeficients $a$ , $b$ and $c$ in the quadratic equation.

So, let's choose the first three points:

(-1,14):

$14=a(-1)^{2}+b(-1)+c$

$14=a-b+c$ (1)

(0,7):

$7=a(0)^{2}+b(0)+c$

$7=c$ (2)

(1,4):

$y=2x^{2}-5x+7$

$4=a(1)^{2}+b(1)+c$

$4=a+b+c$ (3)

Substituting (2) in (1) and (3):

$14=a-b+7$ (4)

$4=a+b+7$ (5)

At this point we have a system with two equations.

Adding (4) to (5):

$18=2a+14$ (6)

Isolating $a$ :

$a=2$ (7)

Substituitng (7) in (3):

$4=2+b+7$ (8)

Isolating $b$ :

$b=-5$ (9)

Now we have the three coeficients and we can write the quadratic equation:

$y=2x^{2}-5x+7$

8 0

4 years ago

A dog weighs 44 pounds. The dog needs to lose 7 pounds to reach its ideal weight. Mikala wrote the equation x+7=44 to represent

ser-zykov [4K]

I don't think either is right
I think it should be
44-7=x
So 44 - 7 = 37
X =37

7 0

4 years ago

You are saving for a pair of shoes. After saving for 5 weeks you have $42.50 saved. If you save the amount each week how much wi

antiseptic1488 [7]

you take the amount you have and divide it with 14 week (I think)

8 0

3 years ago

Need to be done asap!!! I will give u brainliest if ur right

alisha [4.7K]

The answer is the first one, A

3 0

4 years ago