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2 years ago

-10÷_100(20+501) that is my home work

Mathematics

1 answer:

KIM [24]2 years ago

5 0

Answer:

-52.1

Step-by-step explanation:

-10/100 = -0.1

-0.1 x 20 = -2

-0.1 x 501 = -50.1

+ -2

____

-52.1

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amid [387]

Answer:

Step-by-step explanation:

Lets find the rate of selling:

Let v= the rate of selling, b = number of bottles of water, and t = time:

b over t gives us the $v=\frac{b}{t}=\frac{3}{20}=\frac{6}{40}=0.15$ rate of selling:

3 hours is 60min * 3 = 180 mins, and since v=b/t, vt=b:

(0.15) * 180 = 27 bottles of water

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2 years ago

What is the value of sec theta given the diagram below?

marishachu [46]

Answer:

$\sec \theta=-\sqrt{5}$

Step-by-step explanation:

The hypotenuse is $h^2=6^2+3^2$

$h^2=36+9$

$h^2=45$

$h=\sqrt{45}$

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The terminal side of $\theta$ is in the second quadrant.

In this quadrant; the secant ratio is negative.

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$\sec \theta=-\sqrt{5}$

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3 years ago

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2 years ago

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Mario has 7 cups of milk. A one batch recipe for pancakes calls for 2/3 cup milk. To see how many batches he could make Mario fi

Inessa [10]

Mario's mistake is made when doing reciprocal.

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3 years ago

A) x = -2<br> B) y =2<br> C) y= -2

LenKa [72]

Answer:

Step-by-step explanation:

This is a positive parabola so it opens upwards. The equation for the directrix of this parabola is y = k - p. k is the second number in the vertex of the parabola which is (0, 0), but we need to solve for p.

The form that the parabola is currently in is

$y=a(x-h)^2+k$ so that means that $a=\frac{1}{8}$ . We can use that to solve for p in the formula

$p=\frac{1}{4a}$ so

$p=\frac{1}{4(\frac{1}{8}) }$ which simplifies to

$p=\frac{1}{\frac{1}{2} }$ which gives us that

p = 2. Now to find the directrix:

y = k - p becomes

y = 0 - 2 so

y = -2, choice A.

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3 years ago