inaysiaj inaysiaj
  • 12-02-2017
  • Mathematics
contestada

A corner store sells two kinds of baked goods. Cakes and pies. Cakes costs $5 and pie cost $7. They sold 15 baked goods for 91$. How many cakes didthey sell?

Respuesta :

konacat9 konacat9
  • 12-02-2017
Cake=x
Pie=y

x+y=15
5x+7y=91

(x+y=15)-7
5x+7y=91

-7x+(-7y)=-105
5x+7y=91

-2x=-14
x=7

They sold 7 cakes
Answer Link

Otras preguntas

What is the value of x? Enter your answer in the box. x =
what was the purpose of the war bond sold during world war I
How would you say good-bye to a friend whom you will meet later in the day? A. Hasta luego. B. Hasta mañana. C. Adiós, nos vemos mañana. D. Buenas tarde
we often use the word "myth" as a synonym for "lie" or "untruth." Do you believe this is correct?
i am a cubic function with roots of -4,-1, and 2 my leading coefficient is negative, what am I?
PLEASE ANSWER I GIVE YOU BRAINLIST IF YOU GET ALL RIGHT OR FIRST TO ANSWER1 This is a form of government run by elected leaders.2 This is a type of government i
does anyone know how to solve this?
What is the sum (7+8i) + (-8+9i)
Alkali is another word for ______. A neutral B acidic C basic D buffer
If [tex]\frac{x+3}{4}[/tex], what is the equation for f–1(x)?