7. a) Determine the error, if any, in the solution to this equation. Describe in words, in detail.
-6(2x – 5) = 4x – 2(x + 3)
- 12x + 30 = 4x – 2x – 6
-12x – 12x + 30 = 6x – 12x – 6
30 = -6x - 6
30 + 6 = -6x – 6 + 6
36 = - 6x
36 -6x
-6 -6
-6= x

b) If an error, solve the equation correctly.

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!

do your own work and don"t cheat.

step-by-step explanation:

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus

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