irunthepaint irunthepaint

04-05-2021
Mathematics

contestada

the ratio of boys to girls in a classroom is 7:5 4 boys are added to the class the ratio is now 1:1 find the total number of girls in the class

Respuesta :

fungusgi fungusgi

05-05-2021

Answer:

14

Step-by-step explanation:

7/5. = x/ x- 4 (the ratio to each other is the same)

cross multiply

7x-28 = 5x

simplified: -2x = -28

divide x and -28 by -2

x= 14

x= # of girls

Answer Link

Otras preguntas

Rachel jogged along a trail that was 1 fourth of a mile long . she jogged along a trail 8 times. how many miles did she jog.

what is 1.45 percent of 17,370.98

The SI unit of power is the

HELP!!! MUCH CONFUSION LINGERING THIS QUESTION! A scientist observing a group of spider monkeys noticed that the adult females often spend time picking leaves o

solve inequality and graph 3<-5n+2n

Please answer this question correctly

round 81.139 to the nearest tenth

Under Gorbachev's policy of "glasnost," __________. A) collective farms were disbanded and distributed to peasants B) the Communist Party was abolished C) restr

Let f(x) = 7x - 13. Find f-1(x).

What is the best definition of the term “cottage industry”? a group of cottages that serves as a factory a group or community that starts an industry together p