Question

−64 = −0.8k
k = ?

Please help me!!!

Answer 1

Explanation:

-64 = - 0.8k

k = -64 / -0.8

therefore k = 80

Hope it will help :)

Answer 2

k = 80

Explanation:

`- 64 = - 0.8k`

We can convert the decimal from - 0.8 into - 8/10.

`- 0.8 = - (8)/(10)`

Rewrite the equation.

`- 64 = - (8)/(10) k`

Move 10 to multiply - 64

`- 64 * 10 = - 8k \\ - 640 = - 8k`

Then we move - 8 to divide - 640.

`( - 640)/( - 8) = k \\ 80 = k`

Dividing both negative equal positive. Therefore, the value of k is 80.

Answer Check

Substitute k = 80 in the equation.

`- 64 = - 0.8 * 80 \\ - 64 = - (8)/(10) * 80 \\ - 64 = - 8 * 8 \\ - 64 = - 64`

The equation is true. Therefore, 80 is the right answer.