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3 years ago

-6 - 13 I don’t get it can someone explain?

Mathematics

2 answers:

zavuch27 [327]3 years ago

5 0

Subtracting a negative number is basically just addition. Think of it as 6+13, which would be 19.

marishachu [46]3 years ago

3 0

Answer:

-19

Step-by-step explanation:

So, you can also write this equation as:

-6 + -13 = -19

For example:

You owe your friend $6.

You borrow 13 more dollars from him.

Now you owe him $19.

You have $-19 because you are in debt.

Hope I helped :)

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3 years ago

Could i have some really really quick help?

nata0808 [166]

Answer:

1125 m

Step-by-step explanation:

Given equation:

$h=-5t^2+150t$

where:

h = height (in metres)
t = time (in seconds)

<u>Method 1</u>

Rewrite the equation in vertex form by completing the square:

$h=-5t^2+150t$

$\implies h=-5t^2+150t-1125+1125$

$\implies h=-5(t^2-30t+225)+1125$

$\implies h=-5(t-15)^2+1125$

The vertex (15, 1125) is the turning point of the parabola (minimum or maximum point). As the leading coefficient of the given equation is negative, the parabola opens downward, and so vertex is the maximum point. Therefore, the maximum height is the y-value of the vertex: 1125 metres.

<u>Method 2</u>

Differentiate the function:

$\implies \dfrac{dh}{dt}=-10t+150$