faithlong04 faithlong04

17-09-2019
Mathematics

contestada

a student has some $1 and $5 bills in his wallet. he has a total of 15 bills that ar worth $47. how much of each type of bill does he have

Respuesta :

Аноним Аноним

09-07-2020

Answer:

a = 7 ($1)

b = 8 ($5)

Step-by-step explanation:

a + b = 15 | (-)

1a + 5b = 47

- a - b = - 15

a + 5b = 47

------------------ +

-a + a - b + 5b = - 15 + 47

4b = 32

b = 32 : 4

b = 8

a = 15 - 8 = 7

Answer Link

Otras preguntas

if the spring balance with the iron ball is relaesed what reading will the spring balance record and wht

Two jets simultaneously started traveling in opposite directions from the same airport. Four hours later they were 3800 miles apart. Find the rate of each plane

how much heat is released when 32g of water cools from 46°C and freezes

Please help me with this question

A 20 newton weight is attached to a spring, causing it to stretch, as shown in the diagram below. What is the spring constant of this spring?

Please help me find the answer to this question.

Which statement is true regarding the functions on the graph?

Summarize the views on slavery held by Lincoln and Douglas.

How i can answer this question, NO LINKS, if you answer correctly i will give u brainliest!

Don’t understand this math question