the numbers are 3 and 18
let the first number be n then the second number = 6n and the sum
sum = n + 6n = 21 thus
7n = 21
divide both sides of the equation by 7
n = = 3
the numbers are 3 and 6 × 3 = 18 → (3 + 18 = 21)
Х 30° Calculate the size of angle x. angle x = I
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Imma just solve for f⁻¹(x) for this one
to solve fr the invers
replace f(x) with y
switch x and y
solve for y
replace y with f⁻¹(x)
I'm assuming your thing is
remember
translates to 
so
if we replace y with f(x)
switch
translate
minus 4
evaluate
it equals 4
to solve fr the invers
replace f(x) with y
switch x and y
solve for y
replace y with f⁻¹(x)
I'm assuming your thing is
remember
so
if we replace y with f(x)
switch
translate
minus 4
evaluate
it equals 4