Answer:
Step-by-step explanation:
The system we have:
we can solve the system by eliminating one of the variables, I will eliminate the 'y' variable by substracting the equations:
we have which is zero, so now we have an equation that only depends on 'x'.
so now solving the resulting equation for 'x'
we have the value for x. Now we substitute this in the first of the original equations of the system to find the value of y:
thus, the solution of the system is:
1/2x = 2/3x - 8...multiply everything by common denominator of 6
3x = 4x - 48
3x - 4x = -48
-x = -48
x = 48 <== ur number
Answer:
(-4,9)
Step-by-step explanation:
To solve the system of equations, you want to be able to cancel out one of the variables. In this case, it'd be easiest to cancel out the x variables. To do this, you'll want to multiply everything in the first equation by 2 (2(x-5y=-49)=2x-10y=-98). Then, you can add the two equations together. 2x and -2x will cancel out, so you'll be left with -11y=-99. Next, solve for x by dividing both sides of the equation by -11, which will give you y=9. This is your y-coordinate! At this point, you're halfway to the answer as you just need your x-coordinate. It's not too difficult to find the x-coordinate, since you just substitute 9 into one of the equations. It doesn't matter which one you choose as you should get the same answer with both. I usually substitute the y-value into both equations, though, just to make sure I'm correct. Once you put the y-value into the equations, you should get x=-4 after solving it. :)
Standard form of 7.09×10^4 is 70,900. Move the decimal place four places to the right.
Answer:
16m²
25m²
9m²
Step-by-step explanation:
4 × 4 = 16m²
5 × 5 = 15m²
3 × 3 = 9m²