The answer is A. let me know if you want me to explain.
Answer:
The chlorine tablets are $36 and the pH test kit is $4.40.
Step-by-step explanation:
So what I first did was add 90+11 (because $90 for the chlorine tablets and $11 for the pH kit). The answer you should get is 101. From their I did 101 multiplied by 40% or 101 multiplied by .40 (40% and 0.40 are the same thing). You now get $40.4.
Now I did 90·40%. I got $36
Then I did 11·40%. I got 4.4
I added them up and got $40.4 which was my new price so now we know that the chlorine tablets are $36 and the pH test kit is $4.40.
The co ordinates could become positive or negative such as point a to b is (1,-2) but point b to a is (-1,2)
Answer:
(√2)/2; (√2)/2; 1; √2
Step-by-step explanation:
sin A = cos A
1. sin A
sin A/cos A = tan A = 1
A = arctan 1 = 45°
sin A = sin(45°) = (√2)/2
2. cos A
cos A = sin A = (√2)/2
3. cot A
tan A = 1
cot A = 1/tan A = 1/1 = 1
4. sec A
sec A = 1/cos A = 1 ÷ (√2/2) =1 × 2/√2 = √2
The perimeter is 7, because 7 x 7 equals 49