Elimination:
7x - 3y = 20
5x + 3y = 16
(add)
12x = 36
÷ 12
x = 3
(5 × 3) + 3y = 16
15 + 3y = 16
- 15
3y = 1
÷ 3
y = 1/3
Substitution:
5x + 3y = 16
- 3y
5x = 16 - 3y
÷ 5
x = 3.2 - 0.6y
5(3.2 - 0.6y) + 3y = 16
16 - 3y + 3y = 16
16 = 16
- 16
6y = 0
÷ 6
y = 0
Sorry the substitution messed up for some reason, I'll fix it after I've answered the other question
Abd is a right angled triangle so by pythagoras we know
and to calculate h we need to use the sine rule
i hope this helps
Answer:
180
Step-by-step explanation:
V=lwh
3=10·9·6
3=180
Answer:
Step-by-step explanation:
These answers are in order btw!
1=2
2=4
4=6
8=10
Table 2:
1=3
2=6
3=9
4=12
5=15
I’ll finish table 3 and put it in the commenta since this one will take me longer
Answer:
1/2
Step-by-step explanation:
The dog has 12 for 1 meal.
12=1
6 is half of 12.
6=1/2
