It’s 15, 21, 28 because it’s going up 1,2,3 etc and adding one each time it goes up
Answer:
Step-by-step explanation:
2:7
sum of ratio=2+7=9
concentrate=2/9 ×450=100 ml
water=7/9×450=350 ml
Answer:
y = 16
x = 2
Step-by-step explanation:
y = 8x
y = 4x + 8
then, by substitution:
8x = 4x + 8
8x - 4x = 8
4x = 8
x = 8/4
x = 2
y = 8x
y = 8*2
y = 16
Check:
y = 4x + 8
y = 4*2 + 8
16 = 8 + 8