Question

1. Evaluate [(5-1
x3-1)-= 6-1).​

Answer 1

Answer:

x=-1

Step-by-step explanation:

Let's solve your equation step-by-step.

5−1x3−1=6−1

−x3+4=5

Step 1: Subtract 4 from both sides.

−x3+4−4=5−4

−x3=1

Step 2: Divide both sides by -1.

−x3

−1

=

1

−1

x3=−1

Step 3: Take cube root.

x=(−1)(

1

3

)

x=−1

Answer:

x=−1

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Answer 2

Answer:

6. The efficiency of a certain filament lamp is stated to be 15 lumens/watt. What is the mean spherical power of the lamp if its intake is 100 watts?