B I think but i could be totally wrong
Answer:
+7
Step-by-step explanation:
if you go from 28 to 21 you see there is a difference of 7 and sense the number is a smaller number now we know the dolphin went up more towards the surface there for there is a change of positive 7
28-21=7
Answer:
98
Step-by-step explanation:
10-3=7
7x7=49
49 x2 = 98
Have a good day! uwu
Length＝x
Breadth＝1/3x
(x＋1/3x)×2＝80
4/3x×2＝80
8/3x＝80
x＝30
Length＝30
Breadth＝1/3×30＝10
Hope my answer helped u :)
Answer:x=328
solution=<span> (4x-16)^1/2=36
squaring both sides we get
4x-16=1296
4x=1296+16
x=(1296+16)/4
x=328 .</span>
