What are the solutions of the equation $(x+2)^2-2(x+2)-15=0$ ? Use $u$ substitution to solve.

A. $x=-7$ and $x=1$
B. $x=-5$ and $x=3$
C. $x=-3$ and $x=5$
D. $x=-1$ and $x=7$

20%*x = 8
20% = 2/10
2/10*x = 8 |(*10/2)
2/10 10/2 x= 8 * 10/2 2/10 10/2 =>1 1 x = 80/2 x=40
25% from 40 is 10 25% = 1/4 1/4 * 40 = 40/4 = 10

Answered by kamil | 2024-06-10

Set up an equation as 0.2x = 8, which means 20 percent of x equals 8. Solve the equation by dividing each side by 0.2. Dividing 0.2 from each side results in x = 40. Eight is 20 percent of 40. ;

Answered by repraiseds | 2024-06-12

The unknown number is 40, and 25% of this number is 10.
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Answered by kamil | 2024-10-02