4x+7y=47 /*4 ------>16x + 28y=188
5x-4y=-5 /*7 -------->35x-28y=-35
16x + 28y=188, add this two equations
35x-28y=-35
16x + 28y+35x-28y=188-35
16x +35x=188-35
51x =153m
x=3
5x-4y=-5
5*3-4y=-5
15-4y=-5
4y=15+5
4y=20
y=5
Answer (3,5), B
Answer:
A, C and D.
Step-by-step explanation:
Answer: 
Step-by-step explanation:
Given
Nina bought a computer mouse for $9.30
She paid a $20 dollar bill
The money she received is the difference between what is paid and the cost of the mouse i.e.
Therefore, she gets after deductions.
Step-by-step explanation:
14 / 20 x 100 / 1equal to 42
Answer:
7 6/7
Step-by-step explanation:
To find the area, multiply 2 1/7 by 3 2/3. Then, simplify to get the answer of 7 6/7.
