Answer:
Step-by-step explanation:
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What’s the answer I really need help????
2 answers:
612/68 = 9
if you do not have a calculator, use this technique to solve.
To find the GCF, it can take some guessing and checking.
i started by dividing both numbers by 4: 612/68 = 153/17
now to see if 153 is divisible by 17, think about what number times 7 ends in 3.
9*7=63
then multiply 17*9=153
the answer than is 9
if you do not have a calculator, use this technique to solve.
To find the GCF, it can take some guessing and checking.
i started by dividing both numbers by 4: 612/68 = 153/17
now to see if 153 is divisible by 17, think about what number times 7 ends in 3.
9*7=63
then multiply 17*9=153
the answer than is 9
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9514 1404 393
Answer:
D
Step-by-step explanation:
In the second quadrant, ...
c = 180° -arcsin(24/25) ≈ 106.26°
In the third quadrant, ...
d = 360° -arccos(-3/4) ≈ 221.41°
Then cos(c+d) = cos(327.67°) ≈ 0.84498
This is a positive irrational number, greater than 21/100, so the only reasonable choice is the last one:
_____
Perhaps you want to work this out using the trig identities.
cos(c) = -√(1 -sin(c)²) = -7/25
sin(d) = -√(1 -cos(d)²) = -(√7)/4
Then the desired cosine is ...
cos(c+d) = cos(c)cos(d) -sin(c)sin(d)
cos(c+d) = (-7/25)(-3/4) -(24/25)(-√7/4)
cos(c+d) = (21 +24√7)/100 . . . . matches choice D