Answer:
Step-by-step explanation:
False, because plugging it in would imply that 22.5 = 11.25
Answer:
x = 9, y = 2
Step-by-step explanation:
Given the 2 equations
x + 10y = 29 → (1)
x - y = 7 → (2)
Subtracting (2) from (1) term by term will eliminate the term in x
(x - x) + (10y - (- y)) = (29 - 7), that is
11y = 22 ( divide both sides by 11 )
y = 2
Substitute y = 2 in either of the 2 equations
Substituting in (2)
x - 2 = 7 ( add 2 to both sides )
x = 9
Answer:
12.5
Step-by-step explanation:
4/5r=10
multiply each side with 5
4/5r*5=10*5
4r=50
divide 4 from each side
4r/4=50/4
r= 12.5
Answer:
sin(2θ) = 1/2 has 4 solutions instead of 2
Step-by-step explanation:
The argument of the sine function (2θ) will have a possible range of 0 to 4π in the latter equation, doubling the number of possible answers.
_____
The number of cycles of the sine function you need to consider will match the coefficient of the variable in the sine function argument. Perhaps the graph below can give you a clue as to why.
