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mojhsa [17]
3 years ago
5

Please answer NEED ANSWERS please

Mathematics
1 answer:
Tresset [83]3 years ago
8 0

hello!
so to calculate the circumference of a circle, multiply the diameter of the circle with π (pi). the circumference can also be calculated by multiplying 2×radius with pi (π=3.14)
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How to solve this equation and check it. a - 2.5 = 4.5?
Bezzdna [24]

Answer:

Step-by-step explanation:

a - 2.5 = 4.5

     2.5 = 2.5

a = 7.0 or 7

7.0 - 2.5 = 4.5

4.5 = 4.5

5 0
4 years ago
What is the general equation of a sine function with an amplitude of 6, a period of StartFraction pi Over 4 EndFraction, and a h
Katen [24]

Answer:

C: y = 6 \sin (8(x-\frac{\pi}{2} ))

Step-by-step explanation:

Amplitude is changed by multiplying the entire trig function by a number, by default the amplitude is 1, so multiplying by 6 is necessary; eliminate A and B

Horizontal shift is going through the x axis, so it must be subtracted from the x value. This is only seen in choice C of the remaining answers.

Calculating the period isn't necessary because we already found the right answer but in case you need it in the future; the period is by default 2pi, to get to pi/4, it had to be 8 times smaller, so multiplying x and translations on x by 8 will get you the correct period.

3 0
3 years ago
Read 2 more answers
2abc - 3ab = -30? if a =2, b = -3 and c= 4
velikii [3]

Is your question true or false?

2abc - 3ab = -30? if a =2, b = -3 and c= 4

plug in

2(2)(-3)(4) - 3(2)(-3) = -30

Simplify

-48 + 18 = -30

-30 = -30

Both sides are equal so

It's true.


6 0
3 years ago
how many cubic yds of dirt must be removed to make ahole that is 10 yards deep 12 yards long and 5 feet wide
vfiekz [6]

600 cubic yds of dirt needs to be removed

3 0
4 years ago
Find the surface area of the cylinder in terms of x.
Alekssandra [29.7K]
Surface area in units of PI = 2 x r x h +2 x r^2

first picture:

r = 7, h = 18

2 x 7 x 18 + 2 x 7^2

252 + 98

350 PI cm^2

2nd picture:  

2 x 9 x 20  +2 x 9^2

360 + 162

522 PI in^2


7 0
3 years ago
Read 2 more answers
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