3 years ago

True or False: A number is divisible by 6 if the last digit is even or the sum of all digits is divisible by 3.

Mathematics

2 answers:

telo118 [61]3 years ago

4 0

Not all even numbers are divisible by 6

Alisiya [41]3 years ago

4 0

A number is divisible by 6, if the last digit is even and the sum of the digits is divisible by 3

Hope this will help...

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A cube with side length 4 centimeters is 25% full of sand. What is the volume of sand

earnstyle [38]

First, find the volume of the whole cube
Volume of cube = 4 x 4 x 4 = 64 cm³

The volume of sand is 25% of the volume of cube so,
Volume of sand = 25/100 x 64 = 16 cm³

4 0

3 years ago

Complete the square to the problem X^2+6x-16=0

marishachu [46]

Answer:

Step-by-step explanation:

$(a+b)^2=a^2+2ab+b^2\qquad(*)\\\\-------------------------------\\\\x^2+6x-16=0\qquad\text{add 16 to both sides}\\\\x^2+6x=16\\\\x^2+2(x)(3)=16\qquad\text{add}\ 3^2\ \text{to both sides}\\\\\underbrace{x^2+2(x)(3)+3^2}_{(*)}=16+3^2\\\\(x+3)^2=16+9\\\\(x+3)^2=25\Rightarrow x+3=\pm\sqrt{25}\\\\x+3=-5\ \vee\ x+3=5\qquad\text{subtract 3 from both sides}\\\\\boxed{x=-8\ \vee\ x=2}$