Question

−64 = −0.8k k = ? Please help me!!!

Answer 1

Answer:

Step-by-step explanation:

-64 = - 0.8k

k = -64 / -0.8

therefore k = 80

Hope it will help :)

Answer 2

Answer:

k = 80

Step-by-step explanation:

$- 64 = - 0.8k$

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

$- 0.8 = - \frac{8}{10}$

Rewrite the equation.

$- 64 = - \frac{8}{10} k$

Move 10 to multiply - 64

$- 64 \times 10 = - 8k \\ - 640 = - 8k$

Then we move - 8 to divide - 640.

$\frac{ - 640}{ - 8} = k \\ 80 = k$

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

Answer Check

Substitute k = 80 in the equation.

$- 64 = - 0.8 \times 80 \\ - 64 = - \frac{8}{10} \times 80 \\ - 64 = - 8 \times 8 \\ - 64 = - 64$

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