Calculate cos to two decimal places
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:)
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PLEASE HELPPP THANKS Solve |b| <= 5.
If f(x)=64-x2 and g(x)=8-x which is the rule of the function (f + g)(x)?
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I need help please I keep trying but im getting the wrong answer
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I hope this is right lol
Answer:
-7
Step-by-step explanation:
35=-4 w +7w+56
35-56=3w
-21/3=w
w=-7
Answers
n+7≤53
The sum of a number, which I have named 'n', and 7 can be written as the expression:
n+7
remember the word 'is' in a written problem indicates where you'll most likely use an =,≥,≤ sign. Since they say that it is 'no more than' we know that n+7 is less than or equal to the given number, so we use '≤'.
n+7≤
the number it is less than or equal to is 53, so now we have the completed inequality of:
n+7≤53
a number=x
7=7
is no more than, means is equal to or less than aka <
53=53
x+7<53
form y = mx + b, for the line. (Look at the photo.)
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Answer:
y=2x+1
Step-by-step explanation:
y=mx+c
y-intercept is 1
y=mx+1
gradient= rise/run= 2/1= 2
y=2x+1
Please note your working out with your answer, thank you.
Q11) A lifeguard on top of an observation tower 12.5m high notices a surfer in trouble at an angle of depression of 8 degrees. How far, correct to one decimal place, is the surfer from the tower?
Q13) A boat is 420m from the base of the cliff. The angle of depression of the boat from the top of the cliff is 28 degrees. Find the height of the cliff to the nearest metre.
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I am not doing that with sin, cos and pythagorean theorem.
DEFINITION: we call TAN x=sin x / cos x
This means that in a right triangle the tangent of an angle is the ration of opposed side by adjacent side.
11: tan 8°=12.5/d
==>d=12.5/tan 8°=12.5/0.14054...=88.942121...m≈88.9 (m)
12:
tan 28°=h/420
==>h=420*tan 28°=420*0.5317...=223.3179...≈223.3 (m)
(b) How you can use a number line to help with the calculation
(c) How you can determine the sign of the result
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a-b
a. addition and subtraction
subtraction is adding, but going backwards in oposite direction
b. negative, go to left, postive go to right
c. if negative is more than positive, then ending sign is negaitve
if positive is more than negative, then sign is positive
?
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the standard line equation is y = mx + b, where y is the y point, x is the x point, m is the slope, and b is the y-intercept.
to get the y intercept, we need to transform into the line equation, and caculate out b.
3x + 5y = 8
so 5y = 8 -3x
then y =
which means that