Answer:
undefined
Step-by-step explanation:
x²-7x=12
we make the equation equal to zero by subtracting 12 from both sides, we have..
x²-7x-12 = 12-12
x²-7x-12= 0
we find the factors of 12 such that when we multiply them we will get -12 and when we add them we will get -7, and those factors are but those values are not possible..
so answer = undefined
Answer:
- A (-4, -3)
- C (2, 4)
- E (3, 2)
Step-by-step explanation:
It is convenient to use technology to plot the points and the functions to see what lies where. The first attachment shows such a plot.
_____
Of course, you can do the function evaluations. For example, testing answer B, we find ...
... 3·6 ≤ -2·1 +18 . . . . <em>false</em> for the first equation — not a solution
Checking all the points requires 10 function evaluations. When things get repetitive like that, I like to use a graphing calculator or spreadsheet.
_____
<em>Using a calculator</em>
The second attachment shows a calculator evaluating the viability of each point as a solution. The equations have been rearranged to ...
- -2x -3y +18 ≥ 0
- -x +4y +12 ≥ 0
This makes it easy to look at the evaluation results to see if the solution is viable or not.
The x-values of the points are entered into list L₁ and the y-values into L₂. The result of the first inequality above is in L₃ and the result for the second inequality is in L₄. Any negative value in L₃ or L₄ shows a point that is <u>not</u> part of the solution set. Points B and D fail to match problem requirements.
Points A, C, and E are in the solution set.
Answer:
67.5924 km
Step-by-step explanation:
Answer:
400 feet squared
Step-by-step explanation:
First you divide 6 by 3
you get 20
then you times 20 by its self
and you get 400 feet squared
Answer:
2*127=234
30+1
29+2
28+3
27+4
26+5
25+6
24+7
23+8
22+9
21+10
20+11
19+12
18+13
17+14
16+15
15+16
14+17
13+18
12+19
11+20
10+21
9+22
8+23
7+24
6+25
5+26
4+27
3+28
2+29
1+30
0+31
Step-by-step explanation:
there are multiple answers to what plus what gives me 31 and what times what gives me 234