Answer:
what kind of a question is this? lol. seems liek u need to subtract those 20 students from 70. im not sure wat ur askin but here. try this.
i believe your answers would be
1/2c+7 and 2H-9
The two lines intersect at point B, hope this helps.
Hello!
*Solve the equation:

<span>**Separating the coefficients
</span><span>a = 3, b = -7 e c = 6
</span><span>***Calculating the value of the discriminant
</span>
Δ = b² – 4ac
Δ = (-7)² – 4.3.6
Δ = 49 – 72
Δ = - 23
p.s.: <span>Δ <0. When the discriminant is less than zero, there are no real roots.</span>