Question

I need help with rato and proportions

Answer 1

Answer:

I can explain ratios

Step-by-step explanation:

ex. 1:2

Answer 2

Answer:

b

Step-by-step explanation:

given $\frac{m}{a}$ = $\frac{b}{r}$

(a) is true

consider the numerical example

$\frac{3}{2}$ = $\frac{6}{4}$ ⇔ $\frac{2}{3}$ = $\frac{4}{6}$

(b) is not true ( cross- multiply the original equation ) gives

mr = ab ⇒ (c) is true

(d) is true

using result from (c) divide both sides by a and m

$\frac{mr}{am}$ = $\frac{ab}{am}$ ⇒ $\frac{r}{a}$ = $\frac{b}{m}$