Solve the inequality -7x >21. What is the graph of the solution
2 answers:
Answer:
-3 > x
Explanation:
-7x > 21
___ ___
-7 -7
x < -3
Now, whenever we <em>divide</em> or <em>multiply</em> by a negative, we reverse the inequality symbol.
In order to graph this, you do what I call the zero-interval test, which in this case, we plug in 0 for x, and determining whether the statement is false or true, determines which side we shade:
0 < -3 [Since this is a false statement, instead of shading to the <em>right</em>, we shade to the <em>left</em>.]
I am joyous to assist you anytime.
Answer:
After solving the inequality -7x >21 the answer is x < -3
Step-by-step explanation:
Solve the inequality -7x >21. What is the graph of the solution
Solving:
-7x > 21
Multiply both sides by -1
The inequality sign is reversed
7x < - 21
Now divide both sides by 7
7x / 7 < -21/7
x < -3
The graph is attached in the figure below.
You might be interested in
Answer:
The original length was 41 inches and the original width was 16 inches
Step-by-step explanation:
Let
x ----> the original length of the piece of metal
y ----> the original width of the piece of metal
we know that
When squares with sides 5 in long are cut from the four corners and the flaps are folded upward to form an open box
The dimensions of the box are
The volume of the box is equal to
so
simplify
-----> equation A
Remember that
The piece of metal is 25 in longer than it is wide
so
----> equation B
substitute equation B in equation A
solve for y
Solve the quadratic equation by graphing
using a graphing tool
The solution is y=16
see the attached figure
Find the value of x
therefore
The original length was 41 inches and the original width was 16 inches
