On point (5,1) Fam......................
Answer:
x = 0
y = 5
z = -5.
Step-by-step explanation:
X-5y-z=-20
-2x-y-6z=25
-x-4y-z=-15
Add equation 1 and 3:
-9y - 2z = -35 .......... A
Multiply the first equation by 2:
2x - 10y - 2z = -40
Now add this to equation 2:
-11y -8z = -15.............B
Now multiply equation A by -4:
36y + 8x = 140.........C
Add equations B and C:
25y = 125
y = 5.
Substitute for y in equation A:
-9*5 - 2z = -35
2z = -45 + 35 = - 10
z = -5.
Now find x by substituting for y and z in the first equation:
x - 5(5) - (-5) = -20
x - 20 = -20
x = 0.
1/2
count all outcomes that have at least 2 H's
which is 4. There is a total amount of outcomes is 8.
There is 4/8 chance you will flip at least 2 heads
Answer:
It looks like on step c he took away 10 instead of adding 10
The answer would be 22.
You would use the order of operations to solve this problem,
First you do the parenthesis, there are none so you skip this
Then the exponents, none so skip it
Then you do multiplication and division from left to right
5•7 is 35, 3•8 is 24
So the problem is now
35-24+11
After multiplication comes addition and subtraction from left to right
35-24 is 11
11+11 = 22
So the answer to (5x7)-(3x8)+11 is 22
