I think the answer is 15π inches ² or 15
6 quarters and 7 half dollars
6(.25)=1.5
7(.5)=3.5
1.5+3.5=5
Answer:
The number is: "
12 ".
____________________________________ Let "x" represent "the unknown number" (for which we wish to solve.
The expression:
x <span>− 6 = 2 ; Solve for "x" ;
</span>
_______________________________________________Method 1) Add "6" to EACH SIDE of the equation;
_______________________________________________ →
x − 6 + 6 = 2 + 6 ;
to get:
→
x = 8 ;
______________________________________________Multiply each side of the equation by "
" ; to isolate "x" on one side of the equation ; and to solve for "x" ;
______________________________________________ →
*
x = 8 *
;
→ x = 8 *
;
=
*
;
=
;
=
;
= <span>
1<span>
2 .</span></span>
______________________________________________ x = 12 .
______________________________________________Method 2)______________________________________________ x − 6 = 2 ; Solve for "x" ;
Add "6" to EACH SIDE of the equation;
_______________________________________________ →
x − 6 + 6 = 2 + 6 ;
to get:
→
x = 8 ;
______________________________________________Multiply each side of the equation by "3" ; to get rid of the "fraction" ;
→ 3 *
x = 8 * 3 ;
→
*
x = 8 * 3 ;
→
x = 8 * 3
→
x = 24 ;
→ 2x = 24 ;
→ Divide each side of the equation by "2" ; to isolate "x" on one side of the equation; & to solve for "x" :
2x / 2 = 24 / 2 ;
x = 12 .
__________________________________________________Method 3).__________________________________________________ x − 6 = 2 ; Solve for "x" ;
_______________________________________________Add "6" to EACH SIDE of the equation;
_______________________________________________ →
x − 6 + 6 = 2 + 6 ;
to get:
→
x = 8 ;
______________________________________________Now, divide each side of the equation by "
" ;
to isolate "x" on one side of the equation; & to solve for "x" ;
___________________________________________________{
x } / {
} = 8 / {
} ;
to get: x = 8 / {
} ;
= 8 * (
;
=
*
;
=
;
=
;
=
12 ;
___________________________________________ x = 12 .
___________________________________________NOTE: Variant: (in "Methods 2 & 3") :
___________________________________________At the point where:
___________________________________________ = 8 * (
) ;
=
*
;
__________________________________________ We can cancel out the "2" to a "1" ; and we can cancel out the "8" to a "4" ;
__________________________________________ {since: "8÷2 = 4" ; and since: "2÷2 =1" } ;
__________________________________________and we can rewrite the expression:
__________________________________________ *
;
__________________________________________as:
*
;
__________________________________________which equals:
__________________________________________→
;
=
;
=
12 .
__________________________________________ x = 12 .
__________________________________________Answer:
The number is: "
12 ".
__________________________________________
Step-by-step explanation:
put the known part to one side of the equation or inequation then calculate
for example :
3x - 3 = 9
3x = 9 + 3
3x = 12
x = 4
and
10x + 5 < 25
10x < 25 - 5
10x < 20
x < 2
Answer:
Step-by-step explanation:
+ The 2 diagonals AC et BD have their midpoint M.
+ We can find M like:
So, we can find D like:
The answer is D(2,6)