galacticbossina galacticbossina

23-06-2018
Mathematics

contestada

A collection of dimes and nickels is worth $9.50. There are 132 coins in all. How many of each coin are there?

Respuesta :

mkryukova19 mkryukova19

23-06-2018

number of dimes - x
number of nickels - y

x+y = 132 /*-10 -----> -10x-10y = -1320
10x + 5y = 950

-10x-10y = -1320
10x + 5y = 950
-5y = - 370
y = 74 number of nickels

x+y = 132
x + 74 = 132
x= 132-74
x = 58 number of dimes

Check:
10*58 + 5*74 = 950
950 = 950 True

Answer Link

Otras preguntas

describe gender differences in adhd (rates, symptom presentation and likely diagnoses). how does referral bias influence these rates (you can also discuss diffe

predict the outcome for a person with 2 pregnancies, 150 glucose, 85 blood pressure, 22 skin thickness, 200 insulin, 30 bmi, 0.3 diabetes pedigree, 55 age.

if firms in a competitive market are identical, then the long-run market supply curve will be question 30 options: a) downward sloping. b) undetermined. c) upwa

four students made statements about a tennis ball they were using in a lab. which student made a mistake in her statement? irma julia grace masha

A newborn infant presents with a diagnosis of congenital hypothyroidism. Which of the following findings is associated with congenital hypothyroidism? Select al

digoxin (lanoxin) is a cardiac glycoside that is among the oldest medications used for heart failure. what are its two primary actions?

Which of the big-five personality traits has to do with where a person gets their energy?.

the step in monroe's motivated sequence that requires the speaker to illustrate how they solution they have proposed will meet the need they have addressed is

suppose management decides it wants to offer a 95% service level. that is, cooper company is willing to experience a stock-out probability of 5% during the orde

Characterize the contemporary status of Native Americans in terms of acculturation, secondary structural integration, and primary structural assimilation. How h