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3 years ago

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The cost of hiring a surfboard involves an up-front fee plus an hourly rate. Three hours of hire costs $50 and 7 hours costs $90

. Sketch a graph of costs, $C, for t hours of hire using the information given above.

1 answer:

siniylev [52]3 years ago

6 0

Answer:

...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Simplify <img src="https://tex.z-dn.net/?f=%5Csqrt%20-25" id="TexFormula1" title="\sqrt -25" alt="\sqrt -25" align="absmiddle" c

garik1379 [7]

Answer:

5<em>i</em>

Step-by-step explanation:

= $\sqrt{-1 * 25}$
= $\sqrt{-1}\sqrt{25}$
= $\sqrt{-1}$ * 5

Rule: $\sqrt{-1}$ = <em>i</em>

So you get <em>i </em>* 5<em> </em>=<em> </em>5<em>i</em>

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3 years ago

Select the polynomial that is a perfect square trinomial.

Alina [70]

Answer:

16x^2 -8x +1

Step-by-step explanation:

The square of a binomial expands as ...

(a +b)^2 = a^2 +2ab +b^2

So, you need to look for a trinomial with first and last terms that are perfect squares and a middle term that is double the product of the roots of those terms.

This pattern matches ...

16x^2 -8x +1 = (4x -1)^2

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3 years ago

Use the law of sines to find what Angle R is:

stich3 [128]

Answer:

Step-by-step explanation:

So, according to the law of Sines, we have

$\frac{Sin(A)}{a} = \frac{Sin(b)}{b}$

In our case, we have S and R, so...

$\frac{Sin(S)}{s} = \frac{Sin(R)}{r}$

And we want to isolate R...

$r = sin^{-1} (\frac{Sin(S) * r}{s} ) = sin^{-1} (\frac{Sin(52) * 32}{26} ) = 75.90$

the angle of R is then 75.90 degrees.

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4 years ago

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timofeeve [1]

Two hours step broooooooooooo

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3 years ago

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OverLord2011 [107]

Answer:

True

Step-by-step explanation:

Just compare the numbers to the dots.

I hope this helps!

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3 years ago

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