Which statement is not true?

x2 = 100 if and only if x = 10 or x = –10.
if x2 = 100, then x = 10.
if x = –10, then x2 = 100.
if x = 10, then x2 = 100

Statement represented by option B is not a correct choice.

Step-by-step explanation:

We have been given 4 statements. We are asked to choose the statement that is not true.

A. , if and only if .

Let us solve for x by taking square root of both sides of our given equation.

Therefore, our given statement is true.

B. , then .

Upon taking square root we will get positive and negative 10, therefore, the given statement is false.

C. If , then  

Since we know that square of a negative number is positive, therefore, square of negative 10 is 100 and the given statement is true.

D. If , then  

Upon squaring 10 we will get 100, therefore, the given statement is true as well.

37/3

step-by-step explanation:

step 1: simplify both sides of the equation.

7x+8(x+

1

4

)=3(6x−9)−8

7x+(8)(x)+(8)(

1

4

)=(3)(6x)+(3)(−9)+−8(distribute)

7x+8x+2=18x+−27+−8

(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)

15x+2=18x+−35

15x+2=18x−35

tep 2: subtract 18x from both sides.

15x+2−18x=18x−35−18x

−3x+2=−35

step 3: subtract 2 from both sides.

−3x+2−2=−35−2

−3x=−37

step 4: divide both sides by -3.

−3x

−3

=

−37

−3

x=

37

3

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice