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4 years ago

Whick one of these isnt like the other? 25,16,49,63,81

Mathematics

2 answers:

ryzh [129]4 years ago

8 0

16 is different because it's the only even number.

Minchanka [31]4 years ago

5 0

16 isnt like the others because all of the other numbers are high and 16 is low.

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Which expression is equivalent to √4j^4/9k^8?

solmaris [256]

$\frac{ 2j^{2} }{ 3^{4} }$
SQRT each individual bit: 4 and $j^{4}$ and 9 and $k^{8}$

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4 years ago

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How do I find the slope of the line containing the two points (9,0) and (-5,6)

deff fn [24]

Slope Formula: $\frac{y_2-y_1}{x_2-x_1}$

So using the slope formula, plug in the two points and solve for it as such:

$\frac{0-6}{9-(-5)}=-\frac{6}{14}\div \frac{2}{2}=-\frac{3}{7}$

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4 years ago

A train leaves little rock Arkansas, travels north at 85 kilometers per hour. another train leaves same time and travels south a

iragen [17]

Hi,

Let us denote first train with T₁, its distance d₁, its speed v₁ = 85 km/h.

Similarly, second train would be with T₂, its distance d₂, its speed v₂ = 80 km/h. Also, let d be total distance, d = 495 km.

Given being the fact that train T₁ travels north, and train T₂ travels south, their path is on a straight vertical line. Please create a simple drawing, you will see the vertical line immediately.

Then, we need to find the time t, when d₁ + d₂ = d = 495 km (1)

Each speed v₁, and v₂ is constant, therefore we apply very well known formula:

d₁ = v₁·t, and d₂ = v₂·t (2).

From (1) and (2) we have:

v₁·t + v₂·t = d, or (v₁ + v₂)t = d ⇒ t = d/(v₁ + v₂) = 495/(80 + 85) = 495/165 = 3 hours.

So, it takes 3 hours to have those 2 trains 495 km apart.

Green eyes.

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3 years ago

(HELP IM DOING HOMEWORK THAT IS DUE IN A COUPLE OF MINUTES)

Sidana [21]

Answer:

D I think

Step-by-step explanation:

I'm not 100% sure

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3 years ago

The value of y varies directly with x. If x = 3, then y = 21. What is the value of x when y = 105?

Vikentia [17]

Answer: 15

<u>Step-by-step explanation:</u>

varies directly means: $\frac{y}{x} = k$

Plug in the given values of x and y to solve for k: $\frac{21}{3} = k$ → 7 = k

Next, plug in the k-value of 7 and the given y value of 105 to solve for x:

$\frac{105}{x} = 7$

$\frac{105}{x}(\frac{x}{7}) = 7(\frac{x}{7})$

$\frac{105}{7} = x$

15 = x

6 0

3 years ago