Rebecca had 9/10 of a yard of ribbon. Then she gave 7/20 of a yard to a friend. How much does she have left? Explain your work
2 answers:
Answer: yards
Step-by-step explanation:
By considering the given information , we have
The total initial length of ribbon = yards
The length of ribbon she gave to her friend = yards
The length of ribbon she has left = Initial length - Length she gave
[Multiply 2 on numerator and denominator to the first fraction to make both fractions like.]
hence, the length of ribbon she has left = yards
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The value of x, y and z from the system of equation are -1, -8 and 5 respectively.
Data;
- -2x + 6y + 3z = -31
- -3y + 7z = 59
- 2z = 10
To solve this problem, we have to solve the system of equation using substitution method.
From equation (iii)
let us substitute the value of z into equation (ii)
Let's substitute the value of x and y into equation (i)
From the calculation above, the value of x, y and z are -1, -8 and 5 respectively.
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