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

03-06-2021

Answer:

30

Step-by-step explanation:

15x+12y=90

Divide by 3

5x+4y=30

Answer Link

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 was the goal of Macon‘s bill number two

How did PL280 change the self-governance of Native American tribes?

Which was not part of Karl Marx’s beliefs according to das capital or the communist manifesto

sometimes a linear equation is not written in slope intercept form. how do you convert an equation such as y + 2= x into slope intercept form

What is the Sea level

If the sides of your equilateral triangle are each 3 inches and you are wanting to scale to the larger triangle then... would you multiply the 3 by a whole num

Please help! Apples cost 14 cents each and grapefruit cost 25 cents each. If I buy 2 more apples than grapefruit the total cost is $3.40. How many apples do I b

(ax + b) (bx + a) = 10x² + cx + 10 What are the possible values of a, b, and c

Describe the acceleration of the cart shown. Assume there is no friction. A) The cart will eventually move to the left at constant speed. B) The cart will even

tattoo how is it made