Answer: (b+5)(b-5)
Step-by-step explanation:
both b^2 and 25 are square numbers, so square root both of them to give b and 5, then put into brackets with a + and -
1.30 represents the rate of growth of the mold spores. This decimal is a representation of the percentage growth, which would be 130%.
Since the function is written in terms of weeks, x will equal 4 to represent the amount of spores after 4 weeks. Plug the value into the function:

Rounded to the nearest ones value, there will be 985 mold spores after 4 weeks.
Answer:
AC=6
Ab=3
BC= 6.708
a^2+b^2=c^2
so 6*6 is 36
3*3 is 9
36+9=45
Square root 45 and you get 6.708 for BC
Answer:
-1
Step-by-step explanation:
Y-intercept is the point in a graph where its (0,?). In your graph one box down is where that point is.
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P = 2l + 2w
P = 2(x + 3) + 2(7)
P = 2(x) + 2(3) + 14
P = 2x + 6 + 14
P = 2x + 20
A = lw
A= 7(x + 3)
A = 7(x) + 7(3)
A = 7x + 21