Answer:
BRO IT B
Step-by-step explanation:
Answer:
See below.
Step-by-step explanation:
(i) Sin 130 = sin ( 180 - 130) =<u> </u><u>sin 50 = k</u> (answer).
(ii) sin 50 = cos (90 - 50) = cos 40 = k.
The right angle with hypotenuse of 1 and the side opposite the angle whose sine is k has the adjacent side = √(1 - k^2) ( by the Pythagoras theorem),
so the sine of (90 - 50) = sin 40 = √(1 - k^2)/ 1.
Therefore<u> tan 40</u> = sin 40 / cos 40 = <u>√(1 - k^2) / k</u> (answer)
(iii) cos ( -220) = cos (360 - 220) = cos 140 = - cos 40
= -k.
Now since sec x = 1 / cos x :
<u>sec (-220</u><u>) = </u><u>-1/k</u> (answer).
X can be any number in the graph as long as it is on the x-axis therefore you can put x as -1,0 and 1. Then you would need to replace the ‘x’ in the equation so it would look like y=-2*1+3. You replace ‘x’ with every number you put in the x boxes. Then just solve the equations
y=-2*1+3
Y=-2*0+3
Y=-2*-1+3
They would give you the y axis coordinates so then you just put them together for the middle column.
Answer
y=-2*1+3=1
Y=-2*0+3=3
Y=-2*-1+3=5
Coordinates are (1,3) (0,3) (-1,5)
Step-by-step explanation:
1. 'x' is the total no. of students and 'y' is no. of 6th graders.
1/3 of the total students are 6th graders.
So the equation will be
1/3 × x = y
x/3 = y
2. If x = 90
y = 90/3
y = 30
3. If x = 27,
y = 27/3
y = 9
4. If y = 42
x/3 = 42
x = 42 x 3
x = 126