Hey there for this one you need to know just a few trig identities and just move things around
Answer:
A
Step-by-step explanation:
b^2 = 400
b = 20.............
Only A is a function because it is the only one with just one input for every output. Function B has 4 in the x position twice.
The length = 6W + 7. 2L + 2W = 70. This is a system of equations. To get L by itself in the second problem, -2W from both sides to get 2L = 70 - 2W. Divide by 2 to get L = 35 - W. Now put them together. 6W +7 = 35 - W. Add W to both sides to get 7W + 7 = 35. Subtract 7 from both sides to get 7W = 28. Divide 7 to both sides to get W = 4. Now replace W with 4. 6(4) + 7 = L. 24 + 7 = 31. The length is 31. To check, do the second equation. 2(31) + 2(4) = 62 + 8 = 70. Your answer is 31.
Yes, yes it is the 9 in the hundred place compared looks like this
900>30
