Answer:
Step-by-step explanation:
Answer:
3
Step-by-step explanation:
step1 Isolate the square root on the left hand side
Original equation
√2x-5-4 = -x
Isolate
√2x-5 = 4-x
step2 eliminate the radical on the left hand side
Raise both sides to the second power
(√2x-5)2 = (4-x)2
After squaring
2x-5 = x2-8x+16
step3 Solve the quadratic equation
Rearranged equation
x2 - 10x + 21 = 0
This equation has two rational roots:
{x1, x2}={7, 3}
step4 Check that the first solution is correct
Original equation, root isolated
√2x-5 = 4-x
Plug in 7 for x
√2•(7)-5 = 4-(7)
Simplify
√9 = -3
Solution does not check
3 ≠ -3
step5 Check that the second solution is correct
Original equation, root isolated
√2x-5 = 4-x
Plug in 3 for x
√2•(3)-5 = 4-(3)
Simplify
√1 = 1
Solution checks !!
Solution is:
x = 3
Answer:
Domain is 8 to 15 broomsticks
Range is 1,200 to 2,250 Galleons
Step-by-step explanation:
Here, when we talk of the domain, we are simply referring to the range of values of the number of broomsticks to be bought which is between 8 and 15
When we talk of the range, we are talking of the amount these broomsticks will cost
The cost for 8 broomsticks will be 8 * 150 = 1,200 Galleons
15 broomsticks will cost 15 * 150 = 2,250 Galleons
The range here will thus be 1,200 Galleons to 2,250 Galleons
Answer:
B) 24/35
Step-by-step explanation:
Cos(X)= Adjacent/Hypotenuse
Cos(X) = 24/25
Therefore, option B is your answer.
Hope this answers your question!!
