If 3a + 2b = 7 and 2a + 2b = 9 , what is the value of
1 answer:
Hey there :)
We have two equations:
3a + 2b = 7
2a + 2b = 9
We need to solve simultaneously to find the values of a and b
eq.1 3a + 2b = 7
eq.2 ( 2a + 2b = 9 ) x -1 ) multiply by -1 to cancel 2b
3a + 2b = 7
- 2a - 2b = -9 ( Add both together )
-------------------
a = - 2 Substitute the value you found for a in a in order to find b
3( - 2 ) + 2b = 7 2( - 2 ) + 2b = 9
- 6 + 2b = 7 OR - 4 + 2b = 9
2b = 13 2b = 13
b =
b =
You might be interested in
72 is 266.666666667% of 27
Well if their are only 2 section are able and they are all equal so it should be 2 parts
(2*3*1)=6
135/6=22.5
1st = 22.5 ft
2nd= 45 ft
3rd = 67.5 ft
add it up and you get 135 feet
The answer is A) 6. You are trying to have f(x) be equal to 23 meaning you have to set them equal to eachother. 3x+5=23.
Hope that helps.