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2 years ago

Which is not a solution of sin 20 = 1? A = 90 B = 45 C = 225 D = - 135

Mathematics

1 answer:

koban [17]2 years ago

6 0

If you plug in 90 into theta, the expression becomes sin(180), which has a value of zero. Therefore 90 cannot be a solution to this equation. Hope this helps.

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If a/b=p/q, then (a+b)/b=

a_sh-v [17]

Answer:

Step-by-step explanation:

$\frac{a+b}{b}=\frac{a}{b}+\frac{b}{b}\\\\=\frac{a}{b}+1\\\\=\frac{p}{q}+1$

4 0

3 years ago

An inverted pyramid is being filled with water at a constant rate of 25 cubic centimeters per second. The pyramid, at the top, h

UNO [17]

Answer:

$\frac{225}{16} cm/s$

Step-by-step explanation:

We are given that

$\frac{dV}{dt}=25cm^3/s$

Side of base=4 cm

l=w=4 cm

Height,h=12 cm

We have to find the rate at which the water level rising when the water level is 4 cm.

Volume of pyramid= $\frac{1}{3}lwh=\frac{1}{3}l^2h$

$\frac{l}{h}=\frac{4}{12}=\frac{1}{3}$

$l=\frac{1}{3}h$

Substitute the value

$V=\frac{1}{27}h^3$

Differentiate w.r.t t

$\frac{dV}{dt}=\frac{3}{27}h^2\frac{dh}{dt}$

Substitute the values

$25=\frac{1}{9}(4^2)\frac{dh}{dt}$

$\frac{dh}{dt}=\frac{25\times 9}{16}=\frac{225}{16} cm/s$

5 0

3 years ago

Places located in high latitudes have

Inessa05 [86]

The correct answer among all of the given choices would be: D. The coldest climates on Earth.

I hope this is the answer you were looking for and that it helps!! :)

5 0

3 years ago

The regular price of a shirt is $24. The sale price is $18. The sale price is what percent of the regular price?

Brrunno [24]

$18=24x$

$\frac{18}{24}=\frac{24x}{24}$

$0.75=x$

The discount price is 75% of the original price :)

4 0

3 years ago

I am very confused send help

enyata [817]

Okay so let’s start with number one you have 2 out of the 3 sides and you have to solve for the third

Let’s call the side you are looking for side A than the side with 13 side B and the side with 29 side C

So
B=13
C=29
A= ?

You would use the equation

A^2 + B^2 = C^2

So

A^2 + (13)^2 = (29)^2

13^2 = 169
29^2 = 841

So

A^2 + 169 = 841

A^2 = 672

A= 4 times the square root of 42

Or if yu need a estimated answer

A= 25.9

8 0

3 years ago