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Pavel [41]
3 years ago
9

6.

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
4 0

Answer:

A. b2 – 4ac = 7

Step-by-step explanation:

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Option A is the answer

mark me as brainliest

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What is the sum of 8 and 7, doubled
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(8+7) x 2

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21,618.........................
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Which point is in the solution set of the given system of inequalities 3x+y>-3,x+2y<4
Dima020 [189]
Step 1. Solve both inequalities for y:
3x+y\ \textgreater \ -3
y\ \textgreater \ -3x-3

x+2y\ \textless \ 4
2y\ \textless \ -x+4
y\ \textless \ - \frac{1}{2} x+2

Step 2. To check a point in the solution of the given system of inequalities, look for the intercepts of the lines -3x-3 and - \frac{1}{2} x+2:

y=-3x-3 (1)
y=- \frac{1}{2} x+2 (2)

Replace (1) in (2):
-3x-3=- \frac{1}{2} x+2
Solve for x:
\frac{5}{2} x=-5
x=-2 (3)

Replace (3) in (1):
y=-3x-3
y=-3(-2)-3
y=6-3
y=3

We can conclude that the point (-2,3) is in the solution of the system if <span>inequalities</span>; also any point inside the dark shaded area of the graph of the system of inequalities is also a solution of the system.

4 0
3 years ago
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-2(csc^2 θ - cot^2 θ) - 1 =<br><br> -2 <br><br>-3 <br><br>-1
ruslelena [56]

Answer:

- 3

Step-by-step explanation:

- 2( { \csc}^{2}  \theta \:  -  {cot}^{2}  \theta) - 1 \\  =  - 2(1) - 1 \\  =  - 2 - 1 \\  =  - 3

5 0
3 years ago
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