The zeroes (or 'roots') of a function occur when it crosses the x-axis, the line
y
=
0
. Let
x
2
−
25
=
0
. Rearranging
x
2
=
25
→
x
=
±
√
25
=
±
5
. The roots are
+
5
and
−
5
.
answer:
2.78 dollars
step-by-step explanation:
hello there!
first we multiply 10 to $ 0.21 ( we got the number 10 from the extra 10 minutes after the first 4 minutes )
10 + $ 0.21
= 2.10 dollars
then we need to add $ 0.68 to $ 2.10 dollars
$ 0.68 + $ 2.10
= 2.78 dollars
2.78 dollars is how much it costs for a 13.44 minute call!
i hope this helps you and please tell if there was a mistake in this, have a wonderful day! <3
Domain = {-3, 2}
Range = All real numbers
We can represent the range in interval notation as which is basically saying . The range is all real numbers due to the arrows meaning the graph extends up and down forever. So any y value is possible.
Notice with the domain we only have 2 valid x values -3 and 2. No other x values are allowed. Normally we use an interval of some kind to set up the domain, but we only have a set of values instead. The curly braces indicate "set".
Answer:
D
Step-by-step explanation:
Lets look at all of the answer choices:
Choice A: 9%
= 0.09
Choice B: 0.125
= 0.125
Choice C = 7.8*10^-2
= 0.078
Choice D = 7/16
= 0.4375(THE ONLY ANSWER ABOVE 0.4)