-30 because -30 +20=-10
Hope this helped
The correct simplification of 8x2(5x 2x2 − 3) is 
<h3>What do you mean by simplification?</h3>
- Simplifying procedures is one way to achieve uniformity in work efforts, expenses, and time. It reduces diversity and variety that is pointless, harmful, or unnecessary.
- Making anything simpler is the act or process of simplification. Everyone is in favor of streamlining court procedures.
- Certain "solving" issues are connected to "simplification" issues. Parentheses and even nested grouping symbols can be found in some equations, just like in some expressions. Whether we're working with equations (so we're also solving) or expressions (and only simplifying), the simplification procedure is the same in both cases.
The correct simplification of 8x2(5x 2x2 − 3).


Rearranging the above expression in descending order of power, we get:
The correct simplification of 8x2(5x 2x2 − 3) is 
To learn more about simplification, refer to:
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Answer:



Step-by-step explanation:
By the triangular law of vector addition:


We have that;



From triangle ABC,

Again from triangle XYB




Answer:The equation x² + 7 = 0 has no solution
Explanation:1- using graph:To solve the equation means graphically means to find the x-intercepts.
The attached image shows the graph of the given function.
We can note that there are no x-intercepts. This means that the given function has no real solutions
2- using algebra:To solve the equation algebraically means to find the values of x that would make the equation equal to zero.
Solving the given equation, we would find that:
x² + 7 = 0
x² = -7
x = <span>± </span>√-7
The square root of a negative number will always give imaginary values. This means that the equation has no real solutions
Hope this helps :)
Answer:
17 cm.
Step-by-step explanation:
Because 12 cm + 5 cm. is 17 cm.