X ≥ 0
4 < √x < 9 ⇒ 4² < x < 9² ⇒ 16 < x < 81
x = 5² = 25 or x = 6² = 36 or x = 7² = 49 or x = 8² = 64
x∈(16; 81)
Part A: -x+y=5
+x +x
y=x+5
4x+x+5=10
5x+5=10
-5 -5
5x=5
x=1
1(-x) +y=5
-1+y=5
+1 +1
y=6
The solution is (1,6)
Part B:
-x+y=5
-1+6=5
5=5
4x+y=10
4(1)+6=10
4+6=10
10=10
Horse = 10
Horseshoe = 4
Boots = 2
1+10*2 = 21
Ok so grapes,
We have 4 servings and 9.88 grams total, so to find one serving we just need to divide by 4.
9.88/4 = 2.47 per serving