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AURORKA [14]
3 years ago
8

Solve the system of equations algebraically

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

Answer:

c

Step-by-step explanation:

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The graph shows the solution to which system of equations?
Sedaia [141]
So let's start by guesstimating the slopes:
the green line has a slope close to -x, but more negative than that, possibly -2; the pink line has a slope close to +x, but higher towards +2.

Next let's look at the solution: the two lines intersect at the point (1, -1).
**you could just simple plug that x (1) into all the equations, but let's rule out answers anyway. ;)

A) is incorrect because the slopes of -1 and +1 are off from out predicted -2 and +2
B) is incorrect because of a similar reason, the slopes of +3 and +1 don't make any sense
C) Ooh, we do have a +2 and -2 for the slopes, and... violà! plug in 1 for the x's and we get -1 for the y in both equations
D) slopes are closer than in A and B, but plugging in 1 doesn't get us -1

So the correct answer is:
C) y = 2x - 3 and y = −2x + 1
6 0
3 years ago
What is the answer to -134>-a+2(-7-7a)
maw [93]

Answer:

the answer is a > 8

i hope this helps!!

6 0
3 years ago
Evaluate the following expression. 5^-3
Ulleksa [173]
5^-3 is 1/125

The negative in the exponent makes it so there is a 1 over the problem if there was no negative. When you have a negative in the exponent, the answer will be the reciprocal (opposite) of the question with no negative.
For example,

9^2 = 81

9^-2 = 1/81

6 0
3 years ago
If one pound = rupees 135 and dollar =105 rupees then convert the pound 63 into Dollar​
enot [183]

Answer:

Step-by-step explanation:

£63 = 135 × 63

       = Rs . 8505

Rs . 8505 = 8505 / 105

                 = $81

6 0
2 years ago
How much more pizza is in a 12-in.diameter pizza than an 8-in.diameter pizza?
e-lub [12.9K]

Answer:

62.8 in2

Step-by-step explanation:

With round pizza we need to

find the area of each pizza in

square inches, then determine

the difference.  

The area of a circle is given by:

A = πr2

 

12 inch diameter, radius = 6

a = π(62) = 36π in2

 

8 inch diameter, radius = 4

a = π(42) = 16π in2

 

Difference:  36π - 16π = 20π in2

 

using 3.14 for pi, the difference is

20(3.14) = 62.8 in2

3 0
3 years ago
Read 2 more answers
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