Answer:
2
Step-by-step explanation:
evaluate from left to right, substituting the given values into the expression
= [tex]\frac{70}{10}[/tex] + (5 × 3) - (2 × 10)
= 7 + 15 - 20
= 22 - 20
= 2
Substitute the values of a and b to the expression:
[tex]a=3,\ b=10\\\\\dfrac{70}{b}+5a-2b=\dfrac{70}{10}+(5)(3)-(2)(10)\\\\=7+15-20=22-20=\boxed2[/tex]
