first lets solve for x
9x-7y=-7
it will be easier to start if the equation is equal to 0
so first add 7 on both sides
9x-7y=-7
+7 +7
now we have
9x-7y+7=0
now to get x on one side subtract 9x from both sides
<span> 9x-7y+7=0
</span>-9x -9x
--------------------
-7y+7=-9x
now to get x alone we divide both sides by -9
7/9y-7/9=x
Answer:
Each computer needs 3/2, or 1.5 feet of cable
Step-by-step explanation:
Firstly, we need to divide 4 1/2 by 3
Then we can make 4 1/2 an improper fraction.
We will also multiply 4 by 2 and then add 1
= 8 + 1
= 9
But;
9/2 = 4 1/2
In order to divide 9/2 by 3/1, we will change 3/1 to 1/3 and then multiply
= 9/2 × 1/3
= 9/6
= 3/2 or 1.5
Therefore, each computer needs 3/2, or 1.5 feet of cable.
7.810 Rounded to the nearest thousandth
Step-by-step explanation:
To get the inverse, swap the x- and y-variables, then solve for y. We should have the equation:
Solving for y:
because or
So on interchanging the variable, we get the equation:
Answer:
A = (x^2 - 2x - 8) m^2
Second option
Step-by-step explanation:
Area of rhombus = 1/2 d1 * d2
= 1/2(2x+4)(x-4)
= 1/2 (2x^2 -8x + 4x - 16)
= 1/2 (2x^2 - 4x - 16)
= x^2 - 2x - 8