Answer:
x=4
Step-by-step explanation:
1/3 (20 + x) = 8
multiply both sides of equation by reciprocal of 1/3
3/1 * 1/3 (20 + x) = 8 * 3/1
20 + x = 24
subtract 20 from both sides
x = 4
Answer:
95.49 g
Step-by-step explanation:
D = m/v
Looking for mass so isolate m to form equation format
D × V = m
Plug in numbers
.7892g/mL × 121.0 mL = 95.4932 g
Only g and not g/mL because the mL cancels each other out. It's easier to see if you rewrite it on paper.
Round to sig figs
Both original numbers hold 4 sig figs
95.49 g
Answer:
Step-by-step explanation:
To solve for w use the properties of equality. A property of equality states that if you do the same thing to both sides it is still equal.
First, subtract 21 from both sides
1) P-21=2w
Then, divide both sides by 2
2) (P-21)/2=w
This formula allows you to solve for w by plugging in a P-value.