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Aneli [31]
3 years ago
10

–2x + 2y = -4 3х + Зу = -18

Mathematics
1 answer:
rodikova [14]3 years ago
3 0

Answer:

(-2, -4)

Step-by-step explanation:

–2x + 2y = -4

3х + Зу = -18

Divide the first equation by 2

–2x/2 + 2y/2 = -4/2

-x +y = -2

Divide the second equation by 3

3х/3 + Зу/3 = -18/3

x + y = -6

Add these equation together

-x +y = -2

x + y = -6

-------------------

0x + 2y = -8

2y = -8

Divide each side by 2

2y/2 = -8/2

y = -4

Now we need x

x+y = -6

x-4 = -6

Add 4 to each side

x-4+4 = -6+4

x = -2

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.Using a table of values, determine the solution to the equation below to the nearest fourth of a unit. x+4= -3^x+4
Oxana [17]
Remark
The very first thing you should do with a question like this is get the graph. Then you will know what you are looking for. I have provided you with such a graph. Your table should center around -2 ≤ x ≤ -1

So let's set up a table and see what we get. Start with y = x + 5

x             x + 5
-1           4
-1.25      3.75
-1.5        3.5
-1.75      3.25
-2           3

Do the same thing for - (3)^x + 4 See below to see how this is entered your calculator

x            -(3)^x + 4
-1           3.66
-1.25      3.75
-1.5        3.8
-1.75      3.85
-2           3.89

Conclusion
When x = - 1.25 y = 3.75 for both graphs. <<<< Answer

Footnote
You may not be familiar with how to put this in your calculator. This is the way I would do it. I'm only doing it for y = -(3^x) + 4

Let x = - 1.25
3
^ Note your calculator might have x^y or y^x. You'll have 1 of the three.
1.25
+/- 
=
X
1
+/-
=     At this point you should have -0.25
+
4
= 
That gives you 3.75



5 0
3 years ago
Ax+16=b−3x what is a= and what does b= ?
Vlad1618 [11]

Answer:

Slope=4

x−intercept=−  

4

16

​  

=−4

b−intercept=  

1

16

​  

=16.0000

Step-by-step explanation:

7 0
4 years ago
HELP PLEASE ANSWER I HAVE UNTIL 12:00 EST
Kisachek [45]
Hope this helps helps with the answer to your question ;)

6 0
4 years ago
I need to know how to solve these using the box method
Basile [38]

Answer:

5. (2x-3)(3x+2)

6.(x-8)(2x-5)

7.(5x-2)(2x+1)

8.(4x+3)(x+3)

Step-by-step explanation:

example on how to solve this in not how you solve your questions

2x times x = 2x2

2x times 2 = 4x

5 times x = 5x

5 times 2 = 10

The factors are (2x + 5)  and (x + 2), so 2x2 + 9x + 10 = (2x + 5) ×  (x + 2)

4x and 5x are interchangeable, so you could put 5x in the first row and 4x in the second row and still get the same answer.

5 0
2 years ago
Kate Alexander worked 40 hours last week. Her pay rate is $8.50 per hour. Assuming 7.65% social security withholding, how much s
Arte-miy333 [17]

Answer:

d) $26.01

Step-by-step explanation:

7.5% is 0.075

0.0765(8.50×40)

26.01

8 0
3 years ago
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