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3 years ago

I have no clue how to do this. plz help

Mathematics

1 answer:

Phoenix [80]3 years ago

3 0

+2 under the radical (h) means the graph moves two units to the left, while +4 outside the graph (k) means the graph moves up two units. Don’t forget for h, a positive number means move left, negative means right.

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Find the variation constant and an equation of variation where y varies inversely as x and y=5 when x = 15.

bezimeni [28]

y = k/x, where k is the variation constant.

We need to find k.

5 = k/15...This equation leads to the correct value of k (our variation constant).

5(15) = (k/15)(15)

75 = k

Done!

4 0

3 years ago

are any two regular polygons similar. The area of the smaller figure is about 390 cm^2. choose the best estimate of the area of

galben [10]

Answer:

The best estimate of the area of the larger figure is $693\ cm^{2}$

Step-by-step explanation:

step 1

<em>Find the scale factor</em>

we know that

If two figures are similar, then the ratio of its corresponding sides is equal to the scale factor

Let

z----> the scale factor

x-----> the corresponding side of the larger figure

y-----> the corresponding side of the smaller figure

$z=\frac{x}{y}$

we have

$x=12\ cm$

$y=9\ cm$

substitute

$z=\frac{12}{9}=\frac{4}{3}$ -----> the scale factor

step 2

<em>Find the area of the larger figure</em>

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z----> the scale factor

x-----> the area of the larger figure

y-----> the area of the smaller figure

$z^{2}=\frac{x}{y}$

we have

$z=\frac{4}{3}$

$y=390\ cm^{2}$

substitute and solve for x

$(\frac{4}{3})^{2}=\frac{x}{390}$

$(\frac{16}{9})=\frac{x}{390}$

$x=390*16/9=693.33\ cm^{2}$

4 0

3 years ago

Write 1.2 x 10-4 in decimal form.

katrin [286]

The number (in scientific notation) is:

$1.2\times10^{-4}$

The power of "-4" tells us to move the decimal point 4 places to the left.

So, moving it, the number becomes:

$1.2\times10^{-4}=0.00012$

3 0

1 year ago

Which expressions are equivalent to (6273)−4?

goblinko [34]

Answer:

the third one and the one

Step-by-step explanation:

5 0

3 years ago

This is urgent!! I will give brainliest!! I will also rate your answer 5 stars!!

Ad libitum [116K]

Answer:

1. C. mean = 30, median = 29, mode = 24, range = 15

2. B. 6.5

7 0

3 years ago