J-jerry
t-time
d-debbi
t=4x
d=3(4x) - 4x is tim
d=12x
x+4x+12x = 17x miles
1 in = 12 mi
6.5 in = ?
6.5 x 12 = 78 mi
answer. A. 78 mi
He worked 5 hours each night
3x +1
_____________________
x-4 l 3x² -11x -4
3x²-12x
----------------
x -4
x -4
---------------------------
0
First, do 3x² ÷x, the quotient is 3x, put it above the -11x, 3x(x-4)=3x²-12x, put it under the divisor, make sure you line them up according the the exponents. 2nd power under 2nd power, 1st power under 1 power, constant under constant. subtract to get the remainder x. move down the constant -4, now you have x-4. x-4 divided by (x-4)=+1, put the quotient +1 above the constant -4. the remainder is 0.
I hope I've made myself clear.
so the answer is 3x+1
Let the present age of student be x
Present of teacher will be 4x
After 20 years,
Age of student = x + 20
Age of teacher = 4x + 20
According to the given condition after 20 years,
x + 20 = (4x + 20)/2
x + 20 = 2x + 10
2x - x = 20 - 10
x = 10
So student's present age is 10 years while teacher's is 4 x 10 i.e 40 years.
Hope This Helps You!