





Step-by-step explanation:
A) [-3+(6-8)] - [40+(5.3-7)+20.2]
= [-3+(-2)] - [40+(-1.7)+20.2]
= [-3-2] - [40-1.7+20.2]
= [-5] - [38.3+20.2]
= [-5] - [58.5]
= -5 - 58.5
= -63.5
B) -4+[-2.6-1-(-3.4)]+(-5).(-3)+(-10)]
= -4+[-3.6+3.4]+(-15)+(-10)
= -4+[-0.2]-15-10
= -4+[-0.2]-25.
= -4-0.2-25
= -4.2-25
= -29.2
C) -22{-5+[8.3-(3.6-9)]}-(-2)(3)
= -22{-5+[8.3-(-5.4)]}-(-2)(3)
= -22{-5+[8.3+5.4]}-(-2)(3)
= -22{-5+13.7}-(-6)
= -22{8.7}+6
= -191.4+6
= -185.4
D) -9-(-2+5).[-3+(-5)-(+2)+1]
= -9-(3)[-3+(-5)-(+2)+1]
= -9-3[-3+(-5)-(+2)+1]
= -12[-3+(-5)-(+2)+1]
= -12[-3-5-2+1]
= -12[-10+1]
= -12[-9]
= 108.
E) 40{-12[4+(-6)(-5)-15.3+12]}-2
= 40{-12[4+(-30)-15.3+12]}-2
= 40{-12[4-30-15.3+12]}-2
= 40{-12[-26-15.3+12]}-2
= 40{-12[-29.3]}-2
= 40{-12-29.3}-2
= 40{-41.3}-2
= 1652-2
= 1650.
F) -21{-[-6(7-3)]-(7.6-8.3)}-89
= -21{-[-6(4)]-(7.6-8.3)}-89
= -21{-[-24]-(7.6-8.3)}-89
= -21{24-(-0.7)}-89
= -21{24+0.7}-89
= -21{24.7}-89
= -518.7-89
= -607.7
Ok, so here:
Remember for basic probability, you have to do: Probability=Events/Possible outcomes. For multiple events, you have to multiply all together.
The probability the first guy that shows up will be 8/14, because out of the 14 people, 8 of them are men. This however isn't your answer, note the question says "Separately"
The probability the second person that comes in is a dude is 7/13, because you have the first guy already in, and only 13 left.
The third person to come in being a dude has a probability of 6/12
The fourth person to come in being a dude has a probability of 5/11
When you have multiple events, the way to solve probability is to find the chances of each as a fraction, then multiply them together.
8/14 * 7/13 * 6/12 * 5/11=1680/24024
1680/24024=168/168 (168 goes into both)
Your final answer is 10/143
~Hope this helps!
Answer:
Value of x=4 and y=-13/3
Step-by-step explanation:
We need to solve the systems of equations

Solving using substitution method:
Let:

Find value of x from eq(1) and put in eq(2)

Put value of x in eq(2)

Now, finding value of x by putting value of y in eq(1)

So, Value of x=4 and y=-13/3
Answer:
C
Step-by-step explanation: