Answer:
x = -4
Step-by-step explanation:
To make this easier to explain and easier to solve, we're going to first multiply the second equation of 9x-7y=-15 by -1 to make the y coefficient positive.
This results in -9x+7y=15.
When we line up the two equations on top of each other now, we'll see that both the first and second equations have opposite y coefficients, which is vital for elimination.
The next step is to add the second equation to the first one. Teachers may tell you to subtract, but I find it easier to add if you make the two y coefficients of negative value to each other.
4x-7y=5
+ -9x+7y=15
___________
-5x+0y=20, or just -5x=20, because you have successfully eliminated the y variable.
From there, you're going to solve like a normal equation (divide both sides by -5) toget you x=-4.
Answer:
-1 i think or 1/-1
Step-by-step explanation:
it can tow 1000 pounds because 1 ton is 2000 pounds
Answer:
Each Teddy bear is 18.80
Step-by-step explanation:
94.00 divided by 5 is 18.8
Seems to be
an=4(an-1)
means the nth term is 4 times the previus term
easy, times each term by 4
so 2nd is 4*1/2 or 2
3rd term is 2 times 4 or 8
4th term is 8*4=32
first 4 terms are 1/2, 2, 8, 32
