Math uses numbers and equations, and science requires the scientific method and experimentation
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:
C
Step-by-step explanation:
A. 558 m2
B. 976 m2
C. 1,680 m2
D. 1,750 m2
<em>Answer:264 students</em>
Step-by-step explanation:You have to add to get you answer.I'll show you how I got 264:
12+12=24
24+36=60
60+36=96
96+21=117
117+21=138
138+63=201
201+63=264
Your answer is: 264 students
1. being destroyed would be a negative number
2. water increasing in temperature is a positive number
3.descending would be a negative number
4. credit card charge would be a positive number
