WRITING EQUATIONS FROM WORD PROBLEMS

[m_o_r_g_a_n]

Directions:
1. write your let statements ( labeling yourn unknown )
2. write a verbal model
3. write an equation ( algebraic model )
4. solve - show ALL steps!!!

Question: Jack has dimes and nickels. He has 20 coins. Jack has a total of $1.40. How much of each coin does he have?

please help me figure out this problem, im in 8th grade honors algebra, and need some help! thank you so much!

xo

morgan

 

[Denis]

Question: Jack has dimes and nickels. He has 20 coins. Jack has a total of $1.40. How much of each coin does he have? morgan

d = number of dimes; so number of nickels = 20 - d

value of dimes = .10d
value of nickels = .05(20 - d)

.10d + .05(20 - d) = 1.40

OK?

 

[m_o_r_g_a_n]

thanks for the help, but when i solve it i get .9d = 8.60, and that doesnt come out right .... lost in cali

thanks

 

[Gene]

Try multiplying by 100 to get
10d + 5(20 - d) = 140
That <u>looks</u> easier. If you still can't get it, show your work.
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Gene