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Ksivusya [100]
3 years ago
6

If sin(x)=0.28 what is cos(90-x)

Mathematics
2 answers:
Sidana [21]3 years ago
6 0
I think it’s 0.28
I hope that helped
postnew [5]3 years ago
4 0
It is 0.28 because x and 90-x are complementary, so their angles add up to 90°.
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Describe how multiplying all the linear dimensions of a cone by one
Anton [14]

Answer:\frac{1}{64}^{th}

Step-by-step explanation:

Given

Suppose V is the original volume of cone having r as radius and h as height

If we multiply all the linear dimensions of ac one by \frac{1}{4}^{th}

the r'=\frac{r}{4}

h'=\frac{h}{4}

Therefore new volume is

V'=\frac{1}{3}\pi r'^2h'

V'=\frac{1}{3}\pi (\frac{r}{4})^2(\frac{h}{4})

V'=\frac{1}{64}\times \frac{1}{3}\pi r^2h

V'=\frac{V}{64}

So new volume becomes \frac{1}{64}^{th} of the original one

6 0
3 years ago
The general form of the equation of a circle is x2+y2−4x−8y−5=0.
ludmilkaskok [199]
The general equation of a circle is (x-a)^{2} + ( y-b)^{2} =  r^{2} where a and b are the x and y components of the center respectively. 

In order to get into this format, we have to use a method that I'm drawing a blank on the same, my apologies about that.

Anyway, what you want is to first isolate the variable on side so now you have: x^{2} - 4x +  y^{2} - 8y = 5 (you'll see why I rearranged this soon)

Now you have to make it into an equation that can be simplified into the format stated earlier.

So, You have to take the x & y terms (-4x & -8y in this case) divide them each by two, and then square them.

The result of this step is the equation: x^{2} -4x + 4 +  y^{2} - 8y + 16 = 5 + 4 + 16 
Notice the new components that have been added (4 & 16) and how the have been added to both sides. That is an important step.

Now we simplify and get: (x-2)^{2} +  (y-4)^{2}  = 25

So the coordinate of the center is: (2,4) and the radius is 5
6 0
3 years ago
You buy 3 dinners that are $6.85 each. Before tax and tip, the total is $25.42. Is this total correct? Explain
lana [24]

Answer:

no

Step-by-step explanation:

the total would be $19.55 before tax and tip

6 0
3 years ago
At Smith’s Bike Rentals, it cost $27 to rent a bike for 6 hours. How many dollars does it cost per hour of bike use
lilavasa [31]

Answer:

$4.50 per hour

Step-by-step explanation:

Step 1: 27 divided by 6 is 4.50

Step 2: Double check your work by multiplying 4.50 times 6 to make sure you get 27

8 0
3 years ago
Read 2 more answers
Can you please give the answer with the step by step as well.
gogolik [260]

Answer:

easy :) answer is 12x-8y

Step-by-step explanation:

all you do is combine like terms

1. the 10x + 2x which is 12x

2. (this part gets tricky) you have a NEGITIVE 5 minus 3 so if you are subtracting by a negitive number you add (5+3=8) and keep the negitive (-8y)

4 0
4 years ago
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