120 - minimum
140 - 1Q
290 - 2Q
330 - maximum
50% ice cream > 270 calories
....
75% chocolate > 230 calories
<span>c is 9 more than w is
c = w + 9
This equation has to be in the answer.
c is 3 less than w is
c = w - 3
This equation also has to b in the answer.</span>
Answer:

Step-by-step explanation:
Convert the mixed fractions to improper fractions;
⇒
⇒
[add 6/5 to both sides]
⇒
[convert to mixed fraction]
Answer:
x = 1, y = -4
Step-by-step explanation:
7х + 2y = -1 ------ eq1
3х — 4y = 19 ------ eq2
multiply eq1 by 2
2 x (7х + 2y = -1)
14x + 4y = -2 -----eq3
by elimination, add equation 2 and 3
14x + 3x = 19-2
17x = 17 (divide both sides by 17)
x = 1 (answer)
substitute into eq1
7(1) + 2y = -1 (subtract 7 from both sides)
2y = -1 -7
2y = -8 (divide both sides by 2)
y = -8/2 = -4 (answer)