For what value of x does 3^2x-9^3x-4
1 answer:
You might be interested in
Answer:
The answer is 30
Step-by-step explanation:
First you have to find 120% of a (12).
Therefore; 14.4 is 80% of b, and we are trying to find 100% of b
we do not know what is 100% therefore we call it *x*. In order to find this unknown value *x* we cross multiply.
This is the same as saying;
100% percent would be 1 because it is the whole number we are trying to find. The 80% would be 4/5. To get 4/5 you can simply break down 80/100 ( this is 80% as a fraction).
so the new equation is: 14.4= 4/5x
We divide both sides by 4/5. Then we will get x tobe equal to 18. Therefore b is 18. We were asked to find (a + b) so.<em> </em><em>1</em><em>8</em><em>+</em><em>1</em><em>2</em><em> </em><em>=</em><em> </em><em>30</em>
The possible value of x = 4, dimensions 8 by 9 by 1 (option D), if the volume of a box is .
Step-by-step explanation:
The given is,
................................(1)
Step:1
Check for option A,
x = 1, dimensions 8 by 9 by 1
From the equation (1),
Volume =
= -24...................(2)
From the dimensions,
Volume = ( 8 × 9 × 1 )
= 72............................................(3)
From equation (2) and (3)
-24 ≠ 72
So, X=1; dimensions 8 by 9 by 1 is not possible.
Check for option B,
x = 1, dimensions 2 by 5 by 3
From the equation (1),
Volume =
= -24...................(4)
From the dimensions,
Volume = ( 2 × 5 × 3 )
= 30.........................................(5)
From equation (4) and (5)
-24 ≠ 30
So, X=1; dimensions 2 by 5 by 3 is not possible.
Check for option C,
x = 4, dimensions 2 by 5 by 3
From the equation (1),
Volume =
= 72.............................................(6)
From the dimensions,
Volume = ( 2 × 5 × 3 )
= 30............................................(7)
From equation (6) and (7)
72 ≠ 30
So, X=4; dimensions 2 by 5 by 3 is not possible.
Check for option C,
x = 4, dimensions 8 by 9 by 1
From the equation (1),
Volume =
= 72............................................(8)
From the dimensions,
Volume = ( 8 × 9 × 1 )
= 72............................................(9)
From equation (8) and (9)
72 = 72
So, X=4; dimensions 8 by 9 by 3 is possible.
Result:
The possible value of x = 4, dimensions 8 by 9 by 1 (option D), if the volume of a box is .