Y- -7-23
3x-4y= 30
3x-4(-7x-23)=30
3x+28x+92=30 -4 multiplied by -7x and -23 is a positive outcome not negative
31x+92=30
31x=30-92
31x=-62
x= -62/31
x= 2
I think this is the answer, I am a little rusty in the substitution method
Answer:
Let A represent the event that the first group approves the proposal.
Let B represent the event that the second group approves the proposal.
We know the following:
P(A) = 0.3
P(B given A) = 1 - 0.3 = 0.7
P(not B given not A) = 1 - 0.3 = 0.7 .
A) P(approved by both groups)
= P(A and B)
= P(A)P(B given A)
= 0.3(0.7)
= 0.21 .
B) P(disapproved by both groups)
= P(not A and not B)
= P(not A)P(not B given not A)
= (1 - 0.3)(0.7)
= 0.49 .
C) This problem might be ambiguous...do you mean exactly one group or at least one group? So, I will use both interpretations.
P(approved by at least one group)
= 1 - P(disapproved by both groups)
= 1 - 0.49
= 0.51 .
P(approved by exactly one group)
= P(second group reverses the first group's decision)
= 0.4 .
Answer:
A parabola
Step-by-step explanation:
It's a quadratic equation so the graph will be a parabola.
The solutions are -2 and -7
The absolute value is always either a zero or a positive number.
Therefore:
If a number is negative, then the number is less than its absolute value.
Examples to better illustrate this:
1- If a number is "0", then its absolute value is also "0" (number is equal to absolute value)
2- If a number is "25", then its absolute value is also "25" (number is equal to absolute value)
3- If a number is "-25", then its absolute value is "25" (number is less than its absolute value).
I believe that they typo meant 300 fossils of which 21% are snail shells.
Since % means per one hundred...
300(21/100)=63
Elmer has 63 fossilized snail shells.