Hello.

Describing to someone your height; It would be nonsense telling you have -1 meter, for example.

Describing your age; An age of -3 years is meaningless.

Counting the number of inhabitants in a city. Again, a city with -3000 inhabitants can not exist.

5 0

4 years ago

Jack is 2 times as old as Lacy. 7 years from now the sum of their ages will be 35 . How old are they now?

atroni [7]

Assume the old of Jack is X and the old of Lacy is Y
so ...
do the mathematical model ...
.
X=2Y
(X+7)+(Y+7)= 35
-
THEN
Solve the equation
y= 7
x = 14

8 0

3 years ago

Hector and Francis a spent total of $47.50 at the mall. If Hector spent 50% more than Francis, how much did Francis spend at the

Zigmanuir [339]

Francis spent $19 and Hector spent $28.50

5 0

3 years ago

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