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Liono4ka [1.6K]
3 years ago
10

Help me for all these

Mathematics
1 answer:
ad-work [718]3 years ago
5 0
1.) 3+2=?  ?=5 brothers             2.) 54+9=?  ?=63 students              3.) 15-9=?  ?=4

4.) 60-20=?  ?=40 children        5.) 50-15=?  ?=35 trees          6.) 14+4=?  ?=18 times


Don't know why you needed help with this but ok.
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What is the answer to this question and help in full steps
klio [65]
Cos(x)= adjacent/hypotenuse
cos(18)=x/25 (cross multiply)
25*cos(18)=x
x= 23.78 cm <--- this is rounded to the nearest hundredth. 
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3 years ago
Amplitude of y=-3sin5x
GaryK [48]

Answer:

Amplitude is 3

Step-by-step explanation:

in y=-3sin5x

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Murljashka [212]

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How would I solve this Rational Equation? <br><br>Solve for all values of x.
Nesterboy [21]

9514 1404 393

Answer:

  x = 4

Step-by-step explanation:

I like to put these in the form f(x) = 0. We can do that by subtracting the right side. Common factors can be cancelled from numerator and denominator, provided they are not zero.

  \dfrac{7}{x+3}+\dfrac{3}{x-3}-\dfrac{x}{x-3}=0\\\\ \dfrac{7(x-3)+(x+3)(3-x)}{(x+3)(x-3)}=0\\\\\dfrac{(x-3)(4-x)}{(x-3)(x+3)}=0\\\\ \dfrac{4-x}{x+3}=0\qquad x\ne3\\\\x=4 \qquad\text{equate the numerator to zero, add $x$}

_____

If you leave the numerator as (x-3)(4-x), then there are two values of x that make it zero. Because x=3 makes the equation "undefined", it cannot be considered to be a solution.

4 0
3 years ago
The volume of a cylinder is 647 cubic centimeters. If the radius of the cylinder is 4 cm, what is the height of the cylinder? (V
Amiraneli [1.4K]

Answer:

The height h = 12.87 cm.

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Volume = pi r^2 h

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h = 647 / 16pi

h = 12.87 cm.

4 0
3 years ago
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