The value of y varies directly with the value of x. Which function represents the relationship between x and y if y=7/3 when x=21?

y = 1/9x

Step-by-step explanation:

Since it's a direct proportion, the formula to use will be:

y = kx

where,

y = 7/3

x = 21

k = unknown

y = kx

7/3 = 21k

k = 7/3 ÷ 21

k = 7/3 × 1/21

k = 1/9

The function will then be:

y = kx

y = 1/9x

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.