Answer:
I guess it is 236 cm squared
Step-by-step explanation:
Twice the difference between 5 times a number and 6 equals 18:
2(5x-6)=18
We need to solve for x:
5x - 6 = 2(difference) = 18
The difference must equal 9.
In order for the difference to equal 9, x must equal 3.
5(3) - 6 = 2(difference) = 18
Let's solve:
15 - 6 = 2(9) = 18
Therefore, in this equation, x = 3.
Is (-5,2), (5,2), (0,-3), (3,-8), (-7,4), (-1,-1) a function
Alja [10]
<h3>
Answer: Yes it is a function</h3>
Each point listed is of the form (x,y). The x coordinate is always listed first. We dont have any repeat x values, so this is enough to conclude we have a function.
If you wanted to, you could graph each point given on the same coordinate grid. Note how none of the points stack on top of each other. Or put another way, note how it is impossible to draw a single straight line through more than one point graphed. This graph passes the vertical line test.
A function is where plugging in any x value leads to exactly one y value.
If you had two points like (5,2) and (5,7) then the input x = 5 leads to more than one output y = 2 and y = 7 at the same time, making this example not a function.
Answer:
one solution: (-1,1)
Step-by-step explanation:
we have
----> equation A
----> equation B
Solve the system by substitution
Substitute equation A in equation B
solve for x
<em>Find the value of y</em>
----> 
The solution is the point (-1,1)
therefore
one solution: (-1,1)
Answer:
3 French horns
6 tubas
9 trumpets
Step-by-step explanation:
Let the number of French horns be x.
<u>Number of French horns</u> = x
There are twice as many tubas as French horns, so
<u>Number of tubas</u> = 2x
There are three more trumpets than tubas, so
<u>Number of trumpets</u> = 2x + 3
Five times the number of trumpets equals nine times the number of French horns, plus triple the number of tubas, so
