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3 years ago

PLSSS HELP IF YOU TURLY KNOW THISS

Mathematics

2 answers:

almond37 [142]3 years ago

8 0

Answer:

$\frac{ - 1 + 4x}{5} = 3 \\ - 1 + 4x = 3 \times 5 \\ - 1 + 4x = 15 \\ 4x = 15 + 1 \\ 4x = 16 \\ x = \frac{16}{4} \\ \boxed{ x = 4}$

<u>x = 4</u> is the right answer.

nirvana33 [79]3 years ago

5 0

Answer:

$\frac{ - 1 + 4x}{5} = 3 \\ - 1 + 4x = 3 \times 5 \\ - 1 + 4x = 15 \\ 4x = 15 + 1 = 16 \\ x = \frac{16}{4} = 4 \\ thank \: you$

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Eva8 [605]

Answer:

See explanation

Step-by-step explanation:

Solution:-

- We will use the basic formulas for calculating the volumes of two solid bodies.

- The volume of a cylinder ( V_l ) is represented by:

$V_c = \pi *r^2*h$

- Similarly, the volume of cone ( V_c ) is represented by:

$V_c = \frac{1}{3}*\pi *r^2 * h$

Where,

r : The radius of cylinder / radius of circular base of the cone

h : The height of the cylinder / cone

- We will investigate the correlation between the volume of each of the two bodies wit the radius ( r ). We will assume that the height of cylinder/cone as a constant.

- We will represent a proportionality of Volume ( V ) with respect to ( r ):

$V = C*r^2$

Where,

C: The constant of proportionality

- Hence the proportional relation is expressed as:

V∝ r^2

- The volume ( V ) is proportional to the square of the radius. Now we will see the effect of multiplying the radius ( r ) with a positive number ( a ) on the volume of either of the two bodies:

$V = C*(a*r)^2\\\\V = C*a^2*r^2$

- Hence, we see a general rule frm above relation that multiplying the result by square of the multiple ( a^2 ) will give us the equivalent result as multiplying a multiple ( a ) with radius ( r ).

- Hence, the relations for each of the two bodies becomes:

$V = (\frac{1}{3} \pi *r^2*h)*a^2$