Question

Помогите пожалуйста,не успеваю сделать.C решением,заранее спасибо При а=0.5 b=0.4

Answer 1

7b/(a+5b)=7*0.4(0.5+5*0.4)=2.8(0.5+2)=2.8*2.5=7

Answer 2

42:27,5 1,5:2 1,5 * 0,75=125
двоеточие это хочу деления

Answer 3

Solving the Equation

To solve the equation a = 0.5 + b = 0.4, we can start by substituting the value of b into the first equation and then solving for a.

Substituting the value of b into the equation, we get: a = 0.5 + 0.4

Solving this, we find: a = 0.9

So, the solution to the equation is a = 0.9.