Answer:
t=2
j=1
Step-by-step explanation:
3 tacos and a juice is $7
3t+j=7
4 tacos and 2 juices is $10
4t+2j=10
We have a simultaneous equation. It can be solved either by substitution method or Elimination method. For the purpose of this question, the elimination method will be used
3t+j=7 Equation 1
4t+2j=10 Equation 2
To eliminate j, we multiply Equation 1 by 2, the coefficient of j in equation 2, so that in both equations, j can have the same coefficient.
2(3t+j=7)
6t+2j=14 Equation 3
We now have
4t+2j=10 Equation 2
6t+2j=14 Equation 3
We subtract equation 2 from equation 3, to eliminate j
6t-4t=2t
2j-2j=0
14-10=4
We have 2t=4
Divide both sides by 2
2t/2=4/2
t=4/2
t=2
Substitute t for 2 in equation 1, to get j
3t+j=7
3(2)+j=7
6+j=7
j=7-6
j=1
One taco cost $2 while 1 juice cost $2
Hello :
<span>s(x) = x – 7 and t(x) = 4x² – x + 3
</span><span> (t x s)(x)= (x-7)(4x²-x+3) = 4x^3-x²+3x-28x²+7x-21
</span> (t x s)(x)= 4x^3 -29x²+10x -21
78 * ( x/100) = 24
78 * x = 24 * 100
78 * x = 2400
X = 2400/28
X = 400/13
X = 30.77%
The percent is 30.77