berkeleypipkin berkeleypipkin

17-10-2019
Mathematics

contestada

marks brother is nine years older then mark. their combined ages add up to 33. how old is mark

Respuesta :

hansenbianca589 hansenbianca589

17-10-2019

Answer:

12 yrs old

Step-by-step explanation:

Mark(M)+Brother(B)=33

M=B-9

therefore

(B-9)+B=33

2B-9=33

2B=33+9

2B=42

B=21

21-9=M

M=12

Answer Link

17-10-2019

Answer:

Mark is 12 years old

Step-by-step explanation:

a=brothers age

(9+a)+a=33

(9+12)+12

(21)+12=33

a=12

Mark is 12 years old

Answer Link

Otras preguntas

Describe the significance of the Tanzimat reforms, the constitutional movement, and the revolution of 1908-9 to late Ottoman history and the reactions to these

The speed of a car is decreasing uniformly from 35 m/s to 15 m/s in 4 s. What is the car's acceleration

What geometric term does the surface of a chalkboard represent? A) plane B) point C) line D) angle

There are 360 mins for a monthly cell phone minutes for 4 people in the family, can each person get the same number of minutes of the minutes per month. if so,

A rabbit starts from a resting position and moves at 6 m/s after 3 seconds. What is the acceleration of the rabbit?

A spinner is divided into 3 equal sections and is spun 100 times landing on blue 48 times,red 22 times, and green 30 times. What is the theoretical probability

The temperature rose 13 °F between noon and 5 p.m. and then fell 7 °F from 5 p.m. to 10 p.m. If the temperature at noon is 75 °F what would the temperature be a

Why new born humans have such a small brain

The ratio of girls to boys in the 6th grade is 6:7.How many girls are there if there are 364 total students?

What is one way the judicial branch checks the power of the executive branch? A.) The Supreme Court can veto Legislation. B.) Supreme Court justices must be a