!!!!!!!!!help pleaseeeeeee
1 answer:
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Answer:
He Melanie , use SOH CAH TOA to remember the trig functions
Step-by-step explanation:
for 14 they hyp = 22 and we know one angle of 45°, we also know that the triangle has a right angle or 90° and by inspection we can tell that the other angle is also going to be 45° so we know X and Y will be the same length, is why this is a good observation.
Use one of the trig functions with H in it b/c you know Hyp is 22, so,
SOH = Sin(Θ)= Opp / Hyp
Sin(45) = Opp / 22
Sin(45) * 22 = Opp
/ 2 * 22 = opp
11* = opp is the exact answer, if you would like some decimal places, it's 7.7781 units, both X and Y
for 15 we can use SOH again for the bigger triangle. we know the Hyp is 24 and the angle is 30°
Sin(30) = Opp / 24
Sin(30) *24 = Opp
12 = Opp ( Because I know Sin(30) = 1/2 )
Opp is the upright between the two triangles
Use CAH Cos(Θ) = Adj / Hyp
Cos(30) = Adj / 24
Cos(30) * 24 = Adj
/2 *24 =Adj
12 = Adj
Z = 12 or if you want some decimals 20.7846
Becasue the smaller triangle is also a 45° right triangle we know that the upright and side Y are the same lengths
then
Y = 12
You could use SOH or CAH to find the Hyp but, lets just resort to Pythagoras, and use his formula to find Hyp
Hyp =
Hyp =
hyp = 16.97
X = 16.97
:)
The solution for v-9v+49=-2(v-7) is or 5.83(decimal form)
<u>Solution:</u>
Solving right hand side: multiply -2 with terms inside the bracket
v - 9v + 49 = -2v + 14
Move the terms from right hand side to left hand side. On moving a negative signed number from RHS to LHS, it becomes positive signed number.
Similarly, moving positive signed number from RHS to LHS, it becomes negative signed number.
v - 9v + 49 + 2v - 14 = 0
v -9v + 2v + 49 - 14 = 0
-8v + 2v + 49 - 14 = 0
-6v + 35 = 0
-6v = -35
Negative sign on numerator and denominator cancels each other
v = 5.83
Answer:
constant of variation =
Step-by-step explanation:
Given y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 2 when x = 4
k = =
=