Answer:
The first one, 4 - 7 = -3
Step-by-step explanation:
When you add a negative to a postive, you are essentially subtracting the negative from the positive
Answer:
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Answer:
The interval notation is;
Step-by-step explanation:
The solution set of the inequality represented on the number line is
The boundary 4 is inclusive in the solution set, so we use square bracket "[ ]" to show inclusion and open bracket "()" to show that, that part of the interval in not bounded.
In interval notation, we can write this as;
Repeated
Answer:
The graph is positive and decreasing for all real values of x where x < -1
Step-by-step explanation:
we have
The function is a vertical parabola open up
The roots (x-intercepts) are x=3 and x=-1
The vertex is the point (1,-4 ) is a minimum
using a graphing tool
see the attached figure
we know that
In the interval (-∞,-1) ---> the function is positive and decreasing
In the interval (-1,1) ---> the function is negative and decreasing
In the interval (1,3) ---> the function is negative and increasing
In the interval (3,∞) ---> the function is positive and increasing
therefore
The graph is positive and decreasing for all real values of x where x < -1
Answer: The picture's dimensions will be 10"x15".
Step-by-step explanation:
Length: 4 2 10
Width: 6 3 15
You can tell because 15 isn't divisible by 6, but it is divisible by 3, which goes into 6.
Divide 6 by 2.
6/2=3
To keep the ratio, we must also divide 4 by 2.
4/2=2
Then, multiply 3 by 5 for the width.
3*5=15
You must also multiply 2 by 5 to get the length.
2*5=10
The picture's dimensions will be 10"x15".