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3 years ago

Number 19 and number 20 please

Mathematics

1 answer:

aev [14]3 years ago

3 0

F(-1)=3(-1)-5=-3=5=-8

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Which of the following is the correct equation for this function?<br><br>

Rudiy27

Answer:

I'm pretty sure it's a

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Consider the following.x = t − 2 sin(t), y = 1 − 2 cos(t), 0 ≤ t ≤ 8πSet up an integral that represents the length of the curve.

sweet [91]

The length of the parametric curve (call it <em>C </em>) is given by

$\displaystyle\int_C\mathrm ds=\int_0^{8\pi}\sqrt{\left(\frac{\mathrm dx}{\mathrm dt}\right)^2+\left(\frac{\mathrm dy}{\mathrm dt}\right)^2}\,\mathrm dt$

We have

$x=t-2\sin t\implies\dfrac{\mathrm dx}{\mathrm dt}=1-2\cos t$

$y=1-2\cos t\implies\dfrac{\mathrm dy}{\mathrm dt}=2\sin t$

Now,

$\left(\frac{\mathrm dx}{\mathrm dt}\right)^2+\left(\frac{\mathrm dy}{\mathrm dt}\right)^2=5-4\cos t$

so that the arc length integral reduces to

$\displaystyle\int_0^{8\pi}\sqrt{5-4\cos t}\,\mathrm dt$

which has an approximate value of 53.4596.

8 0

2 years ago

Can someone please explain what I have to do

Pepsi [2]

Answer:

16.7 cm

Step-by-step explanation:

Area of a triangle = ½*base*height

Area of the shaded region = area of triangle = 100.2 cm³

base = w

height = 12 cm

Plug in the value into the equation:

½*w*12 = 100.2

6w = 100.2

w = 100.2/6

w = 16.7 cm

4 0

2 years ago

An after school music program has 15 out of 50 students participating. Write 1550 as a decimal and as a percent. Decimal- Percen

yarga [219]

Answer:

0.3

30%

Step-by-step explanation:

To write 15/50 as a percent, you have to multiply the fraction by 100

$\frac{15}{50}$ x 100

dividing 100 by 50 gives 2

15 x 2 = 30%

to convert 15/50 to a decimal, first simply the fraction.

Both the numerator and denominator can be divided by 5

3/10

the next step is to divide the numerator by the denominator

3/10 = 0.3

8 0

2 years ago

Please help question in the picture

anzhelika [568]

Answer:

Step-by-step explanation:

40 squared is 1600

30 squared is 900

1600+900=2500

$\sqrt{2500}$ =50

6 0

2 years ago