Keep these rules in mind:
- (a + b)² = a² + 2ab + b²
- (a - b)² = a² - 2ab + b²
- (a + b)(a - b) = a² - b²
Firstly, solve the exponent and multiplication:

Next, combine like terms:

Next, subtract 4x² on both sides:

Next, subtract 25 on both sides:

Lastly, divide both sides by -20.5. And since you are dividing by a <u>negative</u>, flip the inequality sign:

<u>Your answer is x > 2.</u>
Answer:
π radians=180°(basic definition) 8π9 radians=89⋅180∘=160∘
Hope this helps!! If so please mark brainliest and rate/heart to help my account if it did!!
Answer:
<h2>The distance to the Eath's Horizon from point P is 352.8 mi, approximately.</h2>
Step-by-step explanation:
You observe the problem from a graphical perspective with the image attached.
Notice that side
is tangent to the circle, which means is perpendicular to the radius which is equal to 3,959 mi.
We have a right triangle, that means we need to use the Pythagorean's Theorem, to find the distance to the Earth's Horizon from point P.
The hypothenuse is 3959 + 15.6 = 3974.6 mi.

Therefore, the distance to the Eath's Horizon from point P is 352.8 mi, approximately.
Answer:
13 (Answer B)
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
b(-10) = |-10+4| will be |-6|
The absolute value of |-6| is 6.