alexisschutz alexisschutz

07-02-2022
Mathematics

contestada

b=3/4a
a+b=21

A. a=30 b=15
B.a=371/4 b=-161/4
C. a=20 b=11
D. a=12 b=9

Respuesta :

Аноним Аноним

07-02-2022

Answer:

D option

Step-by-step explanation:

a + b = 21

Placing value of b as 3/4a,

a + 3/4a = 21

7a/4 = 21

a = 12

Putting value of a in b=3/4a,

b = 3 × 12/4 = 9

a = 12, b = 9

Hope it helps.

Answer Link

Otras preguntas

a chess player played 20 games total. if he won 2 of the games, what is the ratio of games he lost to games he won?

find the value of x if 3x - 20 = 130?find the value of x if 8x-2=-9+7x?find the value of x if x + 6 = 33?

12 - (x+3) = 10 need the answer fast but i need it right

In 1787, delegates met in Philadelphia. They came from all of the 13 states except...

What is 4 5/6 - 4 1/2

Write an inequality for each situation There are at least 24 pictures on the roll of film.

The coordinates of a bird flying in the xy-plane are given by x(t)=αt and y(t)=3.0m−βt2, where α=2.4m/s and β=1.2m/s2.part a:Calculate the velocity vector of th

helen bought 4 gallons of paint to redecorate her family room. if she uses 4/5 of the paint on the family room walls how much paint does Helen have left over???

How do you solve 4 x - 11 = 21

Is shaka a God in greece history?