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3 years ago

[khan academy] hello, please help me with this if youre able to, thanks uwu

Mathematics

2 answers:

Ostrovityanka [42]3 years ago

6 0

Answer:

11 units

Step-by-step explanation:

To calculate CD use the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = C(- 4, 6) and (x₂, y₂ ) = D(- 4, - 5)

CD = $\sqrt{(-4+4)^2+(-5-6)^2}$

= $\sqrt{0^2+(-11)^2}$

= $\sqrt{0+121}$ = $\sqrt{121}$ = 11

Brilliant_brown [7]3 years ago

6 0

Answer: 10

Step-by-step explanation:

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How old am I if 500 reduced by 2 times my age is 388

Nimfa-mama [501]

Remember you can do anything to an equation as long as you do it to both sides
a=age

500 reduced by 2 times a is equal to 388

500-2a=388
minus 500 both sides
-2a=-112
divide both sides by -2
a=56

you are 56

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2 years ago

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3 years ago

What is the length of the segment with end points -3,4 and 5,4

Luda [366]

Answer:

Step-by-step explanation:

The distance or the length between two points can be computed using the formula:

$d = \sqrt{(X_2-X_1)^2+(Y_2-Y_1)^2}$

X₁ = x-coordinate of first point

X₂ = x-coordinate of the second point

Y₁ = y-coordinate of first point

Y₂ = y-coordinate of the second point

When we right down the coordinates of a point, we always start with the X and then the Y.

(X,Y)

You have the following coordinates or points

Point 1: (-3,4)

Point 2: (5,4)

Based on that we have the following given:

X₁ = -3

X₂ = 5

Y₁ = 4

Y₂ = 4

Now we just fill in the formula:

$d=\sqrt{(X_2-X_1)^2+(Y_2-Y_1)^2}\\\\ =\sqrt{(5-(-3))^2+(4-4)^2}\\\\ =\sqrt{8^2 + 0^2}\\\\ =\sqrt{8^2} \\\\=8$

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3 years ago