so5434720
so5434720 so5434720
  • 03-06-2021
  • Mathematics
contestada

If 15x + 12y = 90 then 5x + 4y = ?
A) 72
B) 80
C) 14
D) 10
E) 9
With steps pleaseee

Respuesta :

maxamoah58
maxamoah58 maxamoah58
  • 03-06-2021

Answer:

30

Step-by-step explanation:

15x+12y=90

Divide by 3

5x+4y=30

Answer Link
samuelthankgod
samuelthankgod samuelthankgod
  • 03-06-2021

Answer:

30

Step-by-step explanation:

this is common sense

15x + 12y = 90

dividing throughout by 3, we would have

5x + 4y = 30

or

by equating

15x + 12y - 90=5x + 4y -30

15x -5x = 4y -12y -30 + 90

10x=60-8y

dividing throughout by 2

5x= 30-4y

5x+4y= 30

Answer Link

Otras preguntas

How is constant acceleration indicated on a motion map?
During science lab, Jacob mixes together sodium hydroxide (NaOH) and hydrochloric acid (HCl). The two chemicals react to form sodium chloride (NaCl) and water (
what is the original price
Which of these coordanates could be the x intercept of this graph
What does the falling snow symbolize or represent?
I want the answer for this
Please help me thank you
Help on number 8 please
What emotions does henry appeal to with the last lines of his speech?
the slope at any point of a distance-time graph represents