One of the two numbers is 2 less than twice the other number. If the product of these numbers equals to 40, find the numbers. Only algebraic

solutions will be accepted.

hey

let s note a and b the two numbers

we can write

(1) a = 2b - 2

(2) ab = 40

from (2) we can say for b different from 0 that

a = 40/b

replace it in (1)

40/b=2b-2

so

2(b-1)b = 40

b(b-1) = 20

5 is a trivial solution and as the product of the two solutions is -20 then the second solution is -4 therefore

<=> (b-5)(b+4) = 0

<=> b = 5 or b = -4

so we have

a= 40/b = 8 and b = 5

or

a = 40/b = -10 and b = -4

(8,5) and (-10.-4) are solutions

do not hesitate if you have any question

thanks

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24