First you want to know what y or x is i chose y for this on
so the equation i'm going to use is -2x-5y=3
i want to solve for y
-2x-5y=3
+2x +2x
-5y=2x+3
/-5 /-5 /-5
y=-2/5x+-3/5
Now that i solved for y we substitute our answer into the next equation to solve for x like this:
3x+8y=-6
3x+8(-2/5x+-3/5)=-6
3x+ -3.2x+-4.8=-6
-0.2x+-4.8=-6
+4.8 +4.8
-0.2x=-1.2
/-0.2 /-0.2
x=6
After you know what x is you substitute it in for any of the equations that we started with. I picked 3x+8y=-6 to find y.
3x+8y=-6
3*6+8y=-6
18+8y=-6
-18 -18
8y=-24
/8 /8
y=-3
Since we know what x and y are we substitute it with any of the equations that we started with. i picked -2x-5y=3
-2*6-5*-3=3
-12- -15=3
3=3
so our solution (6,-3) works
Well, a rational decimal is like a simple 3.1 or 4.5. It just cuts off easily. Another example would be a repeating decimal like 3.333333...
An irrational decimal is like 3.1415682983523576294875 with no pattern or cutoff point.
Sorry if I am wrong.
Answer:
<u>We need to buy 3 cases of juice.</u>
Correct statement and question:
No. of diners = 240 Portions of juice served = 4 oz. per diner Size of juice can = 48 oz. How many cases of juice required if there are 8 cans in a case and you must buy a whole case?
Source:
Previous question that you can search at brainly
Step-by-step explanation:
Let's calculate the number of cases of juice are required this way:
Number of cases required = [(Number of dinners * portion of juice served)/Size of juice can]/Cans in a case
Replacing with the real values, we have:
Number of cases required = [(240 * 4)/48]/8
Number of cases required = [(960)/48]/8
Number of cases required = 20/8
Number of cases required = 2.5
<u>But let's remember that we must buy only whole cases, then we need to buy 3 cases of juice.</u>
Answer:
5171718881(81(1(77((()818178)902)
Answer:
(x,y) --> (-x,-y)
Step-by-step explanation:
Let me know if that's what your looking for.
