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aliina [53]
3 years ago
7

One step equation

Mathematics
1 answer:
Vikentia [17]3 years ago
7 0

Answer:

$71.50

Step-by-step explanation:

Please mark brainliest.

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Please answer and show how you did it!
Anna35 [415]
This is a parabola, first, locate the line of symmetry.
the line of symmetry is x=-b/2a
in this case, b=-2, a=-1, so the line of symmetry is x=-1
when x=-1, f(x)=-(-1)²-2(-1)-3=-2  
locate the point (-1,-2) on the grid. this point is the vertex.
get two pairs of points with x=-1 as the symmetry line:
(0, -3) and (-2, -3); (1,-6) and (-3,-6) 
connect these five points into a parabola, stick out at the ends because it will extend forever downward. 
3 0
3 years ago
What is 55-22 asap I USED MY HANDS BUT -_-
jok3333 [9.3K]

Answer:

33 there you go

Step-by-step explanation:

4 0
2 years ago
A 98% confidence interval is found to be (50, 60). What is the margin of error?
miss Akunina [59]

Answer:

D. 5

Step-by-step explanation:

Mean: (50+60)/2

110/2

55

Margin of error:

60 - 55

5

3 0
3 years ago
2x + y - z = -8
Andreyy89

Answer:

Multiply row 1 by \frac{1}{2}.

Step-by-step explanation:

The augmented matrix of the system of linear equation is described below:

\left[\begin{array}{cccc}2&1&-1&-8\\0&2&3&-6\\-\frac{1}{2} &1&1&-4\end{array}\right]

Where a_{11} = 2, if we need to create a_{11} = 1, we need to multiply row 1 by \frac{1}{2}, that is to say:

\left[\begin{array}{cccc}1&\frac{1}{2} &-\frac{1}{2} &-4\\0&2&3&-6\\-\frac{1}{2} &1&1&-4\end{array}\right]

Hence, the correct answer is: Multiply row 1 by \frac{1}{2}.

5 0
3 years ago
The denominator of a fraction exceeds the numerator by 7. If 3 is added to the numerator and 1 is subtracted from the denominato
Elodia [21]
9/16 is the original fraction. 9+3 = 12 and 16-1 =15. 12/15 = 4/5
3 0
3 years ago
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