jaeden15 jaeden15
  • 26-01-2021
  • Mathematics
contestada

5. Mark's brother is five years older than Mark.
Their combined ages add up to 23. How old is
Mark?

Respuesta :

MeiLiuSA MeiLiuSA
  • 26-01-2021

Answer:

9

Step-by-step explanation:

Let's say Mark is M and his brother is B.

M+5=B

M+B=23

Now we can solve using subsitution.

M+M+5=23

(Subtract 5 from both sides)

2M=18

M=9

Hope this helped!

Answer Link

Otras preguntas

How many degrees represents 1 person ?
Give an account of a fight that you saw two boys or girls ​.
for a certain base, b, logb^8=3 and logb^0.5=-1 The value of logb^4b is 0, -3, 3
Neoclassical economists believe that it is not possible to change GDP ___________ without a change in the level of the country's resources
What did the Affordable Care Act create?​
1 . Solve 4x + 5 > 5x − 2 for x. 2. Solve 7y − 13 ≤ -2y + 14 for y. 3. Solve 6(1 − 3d) < 2(7d + 6) for d. 4. Solve -11h − 27 ≤ 16h for h.
write the equation of the line depicted below in slope-intercept form:
PLS HELP ME PLS I NEED HELP​
Prewriting/Planning Use this space to list some ways in which your research findings about these roles—including the esteem in which these types of people were
What countries are in Asia?