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musickatia [10]
2 years ago
7

Bennett bought a $21 meal. The sales tax was 5%. Bennett tried to find the sales tax in a few different ways. Which of his metho

ds are correct? Of the correct methods, which makes the most sense to you? Explain.
Mathematics
2 answers:
xz_007 [3.2K]2 years ago
5 0

Answer:

I need a pic of his methods to answer

Step-by-step explanation:

Gemiola [76]2 years ago
4 0
You don’t have a picture or anything?
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Please help math
Naddika [18.5K]
   
\displaystyle\\
15(2a - 2) = 5(a^2 -1) \\  \\ 
30a - 30 = 5a^2-5\\\\
-5a^2 + 30a -30 + 5 =0\\\\
-5a^2 + 30a -25 =0 ~~~~~\Big| \times (-1) \\\\
5a^2 - 30a +25 = 0~~~~~\Big| : 5 \\\\
a^2 - 6a +5 = 0 \\  \\ 
a_{12}= \frac{-b\pm \sqrt{b^2-4ac}}{2a}= \frac{6\pm \sqrt{36-20}}{2}= \frac{6\pm \sqrt{16}}{2}=\frac{6\pm 4}{2}= \boxed{3\pm 2} \\  \\ 
a_1 = 3+ 2 = \boxed{5}\\\\
a_2 = 3-2 = \boxed{1}



8 0
3 years ago
Read 2 more answers
Which equation has a graph that is a parabola with a vertex at (–2, 0)?
MaRussiya [10]

Answer:

The vertex of a quadratic equation corresponds to the point where the maximum or minimum value is located.

If the function has a positive leading coefficient, the vertex corresponds to the minimum value.

If it has a negative leading coefficient,  the vertex corresponds to the maximum valuevalue

If the vertex is located at

(–2, 0)

The possibilities are

y =  (x-2)^2

or,

y = - (x-2)^2

Since the problem tells us the answer, we adopt the positive values

Answer:

y =  (x-2)^2

See attached picture

6 0
2 years ago
Read 2 more answers
Please answer number 1 I give brainliest thank you!
goldfiish [28.3K]

Answer:

Step-by-step explanation:

79+80+92+92+81+100+88+98+71+100+91+90

=1,062/12 = 88.5

4 0
2 years ago
Read 2 more answers
Please solve; help is appreciated
erastova [34]

Answer:

it is between 180 and 90. 90 is a right angle, and 180 is a straight line.

i think it would be around 135 or sum

Step-by-step explanation:

sorry if it didn't help. tried my best

8 0
2 years ago
The graph of a line passes through the two polnts (-2, 1) and (2, 1. What is the equation of the line written in general form
eimsori [14]

Answer:

y=1

Step-by-step explanation:

the x changes but the y stays the same

8 0
3 years ago
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