By what property are x+3(7-x) and x+21-3x equivalent

The given expressions x+3(7-x) and x+21-3x  are equivalent by using the distributive property

Step-by-step explanation:

Given expressions are x+3(7-x) and x+21-3x and also given that they are equivalent

To find for what property the given two expressions are equivalent :

x+3(7-x)=x+3(7)+3(-x)

=x+21-3x ( here we are using the distributive property a(x+y)=ax+ay )

Therefore the given expressions x+3(7-x) and x+21-3x  are equivalent by using the distributive property

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.