for problem 6, you will want to subtract both sides by 5.
n^2 + 7n + 10 = 0
then factor:
(n + 5) (n + 2) = 0
n+ 5 = 0, n +2 = 0
n = -5, n = -2
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for problem 7, add - 12 and - 6 together
n^2 + 3n - 18
<em>(you can put </em>= 0 <em>next to the equation since that can make it easier to solve, I guess)</em>
n^2 + 3n - 18 = 0
then factor:
(n + 6) (n - 3) = 0
n + 6 = 0, n - 3 = 0
n = -6, n = 3
Answer: A star has six lines of symmetry.
Step-by-step explanation:
A star in a flat plane has one line of symmetry, but it can be divided into up to three different angles (120 degrees). A hollow sphere is symmetrical on the inside and will have six lines of symmetry. But if you cut across its middle at any slight angle, you'll also see six lines of symmetry. So the answer is that stars can have either 1 or 6 lines of symmetry depending on how they are measured.
A would be 12. If your sister is 6 years older than your brother your brother is 4
if your brother is 1/3 your age 4 times 3 you are 12
the answer is -8, the 9 is negative and -9+1= -8
