Answer : 21
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Answer:
see explanation
Step-by-step explanation:
Using the sine and cosine ratios in the right triangle and the exact values
sin60° = and cos60° = , then
sin60° = = = = ( cross- multiply )
2BC = 10 ( divide both sides by 2 )
BC = 5
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cos60° = = = = ( cross- multiply )
2AB = 10 ( divide both sides by 2 )
AB = 5
Answer:
Step-by-step explanation:
step 1
Find the slope
The formula to calculate the slope between two points is equal to
we have
(2,-1) and (-4,5)
substitute the values
step 2
Find the equation of the line in point slope form
we have
substitute
step 3
Convert to slope intercept form
isolate the variable y
Answer:
KE = 900,000t²
Step-by-step explanation:
The formula for calculating the kinetic energy of a body is expressed as KE = 1/2mv² where;
m is the mass of the sport car = 2000kg
v is the velocity of the car
Since v = at
v = 30t
Substituting the given values into the KE formula;
KE 1/2 * 2000 * (30t)²
KE = 1000*900t²
KE = 900,000t² Joules where t is the time measured in seconds
Answer: D. 0.69
Step-by-step explanation:
You can use SOHCAHTOA to find the right trigonometric identity to use:
Sine = opposite / hypotenuse
Cosine = adjacent / hypotenuse
Tangent = opposite / adjacent
The opposite side of angle A is side BC, which is 20 units long.
The hypotenuse is AB, which is 29 units long.
Opposite / hypotenuse = 20 / 29, which equals 0.689.
The correct choice is D.