Answer:
x=-9
Step-by-step explanation:
1. 7-3x=34
2. Subtract 7 from both sides to get -3x=27
3. Divide by -3 from both sides to get x by itself which turns out to be x=-9, for 27÷(-3)=-9
X = -1162.5
Subtract 2,401 from both sides.
0 = 76 - 2401 - 2x
0 = -2325 - 2x
Add 2x on both sides.
2x = -2325
Divide both sides by 2.
x = -2325 / 2
x = -1162.5
There is the answer.
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Answer is C. 1/169
first we find how many cards are jacks in a deck: 4 out of 52 cards.
4/52 = 1/13 ( We have a 1 in 13 chance of drawing a jack)
(1/13)(1/13) = 1/169
( because the first card is replaced, we know that we don't have to change probabilities)(it will still be a 4/52 chance of drawing a jack)
Answer:
cos (
) = 
Decimal value: −0.9238795325...
Step-by-step explanation:
Write,
cos = cos 
= −cos 
Now using half angle formula, cos(x) = 2 cos²(
) − 1, we can write cos 
= 2
cos²() − 1
This means 
+ 1 = 2 cos²()
2 cos²() = 
cos²() = 
cos() = 
Simplify,
= 
= 
Hence,
cos () = −cos () =
4x1/2=2. 2 is less than 4 so it shows that it is false.
