Bonjour pouvez-vous m’aider s’il vous plaît, 1-Harry chooses a number, then multiplies it by 5 and adds 7 to the result Check to see if harry chooses 4 as start

Réponse :

Bonjour,

Explications étape par étape

1-Harry chooses a number, then multiplies it by 5 and adds 7 to the result

Check to see if harry chooses 4 as starting number, then the final number is 27.

4 × 5 + 7 = 27

2-if we call x the starting number, write the formula of a function f which gives the final number in function of x. Is this an affine fonction?

f(x) = 5x + 7

This is an affine function because the function is written as y = ax + b

3-which starting number must harry chooses if he wants the final number to be

Nineteen?

5x + 7 = 19

5x = 19 - 7

X = 12/5

X = 2.4

Harry must choose 2.4 as starting number....