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

what were the 4 major causes of imperialism?
What part of the cell produces ATP for the blueberry plant to grow? A. Mitochondrion B. Cytoplasm C. Ribosome D. Nucleus
If 2n=14 what Is 8n? I am really bad at algebra and I need to do my homework
how many yards in 1/4 of a mile? Please help
What is an "alloy" in the chapter of metals in chemistry??
what is the density of a orange if its mass is 158.2 g and the volume is 106 mL
what is it called when oxygen passes into the capillaries that surround these sacs?
Dirk Nowitzki of the Dallas mavericks scored 44 points in a recent basketball game. He scored no 3-point shots, but made a number of 2-point field goals and 1-p
13 squared? how does it mean and what is the solution?
how were the oregon and santa fe trails different ?