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3 years ago

6

Can someone help me?

1 answer:

12345 [234]3 years ago

4 0

$A= ab \frac{sin \theta}{2}$
where A is area
a is side a lets say its 8cm
b is side b lets say its 7 cm
theta is 28

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For each right triangle below, find the missing side (Pythagorean’s Theorem) and the missing angle (Angle Sum theorem.)

valkas [14]

Answer:

a=21.2

n=√29

Step-by-step explanation:

$90+68.2+a=180$

$a+158.2=180$

$a=21.2$

$2^2+5^2=n^2$

$4+25=n^2$

$n^2=29$

$n=\sqrt{29}$

3 0

3 years ago

The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y

Cerrena [4.2K]

We have been given that the inverse variation $y=\frac{3\times 10^8}{x}$ shows the relationship between wavelength in meters, x, and frequency, y. We are asked to find the wavelength for radio waves with frequency $3\times 10^9$ .

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$3\times 10^9=\frac{3\times 10^8}{x}$

$x=\frac{3\times 10^8}{3\times 10^9}$

We can see that both numerator and denominator has 3, so we can cancel it out.

$x=\frac{1\times 10^8}{1\times 10^9}$

Using quotient rule of exponents $\frac{a^m}{a^n}=a^{m-n}$ , we will get:

$x=1\times 10^{8-9}$

$x=1\times 10^{-1}$

Therefore, the wavelength for radio waves would be $1\times 10^{-1}$ meters and option B is the correct choice.

3 0

3 years ago

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How many angles between 0° and 360° have a tangent of<br> of 2/3?

slega [8]

Answer:

2

Step-by-step explanation:

The tangent is positive in quadrants I and III. There are two angles with that tangent value:

33.96° and 213.69°

5 0

2 years ago

Solve the compound inequality 6b < 42 or 4b + 12 > 8. (1 point)

Nitella [24]

6b<42
b<7
4b+12>8
4b>-4
b>-1
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8 0

3 years ago

What is the width of a rectangle with a length of 18 cm and an area of 72 cm²

Pachacha [2.7K]

area = L x W

area = 72

L=18

72= 18 x w

w=72/18 = 4

width is 4 cm

5 0

3 years ago

Read 2 more answers