The amount of substance unit is mol, the answer is c
Answer:
a = 4, b = 8
Step-by-step explanation:
Rewrite 5b=6a+16 and 9a=7b-20 vertically:
5b=6a+16
9a=7b-20
Let's use substitution. Solve the first equation for b:
6a + 16
b = --------------
5
Substitute this result into the second equation:
9a = 7(b) + 16, or
6a + 16
9a = 7*-------------- - 20
5
Eliminate the fraction by multiplying all three terms by 5:
45a = 7(6a + 16) - 100, or
3a = 112 - 100, or:
3a = 12, which leads to a = 4.
Find b by subbing 4 for a in either of the given equations:
5b = 6(4) + 16, or
5b = 40, leading to b = 8
The solution is a = 4, b = 8
Answer:
1
Step-by-step explanation:
200.3865 divided by 200.3865 equals 1
Answer:
7.71 - 0.24 = <u>7.47</u>
Kellys baby brother weighs
7.47 more pounds than her newborn kitten.
Answer:
$56.50
Step-by-step explanation:
2 children is $32.
1 adult is just $24.50
Add these up: $32 + $24.50 = $56.50.