Answer:
Step-by-step explanation:
- x² - 16 = 0
- x² = 16
- x = √16
- x = ± 4
You paid 15 cent because 3 divided by 20 is 0.15
The answer to the question
Answer:
x=2, y=3.
Step-by-step explanation:
0.2x + 0.3y = 1.3
0.4x + 0.5y = 2.3
From the first equation y = (1.3 - 0.2x) / 0.3
Substituting in second equation:
0.4x + 0.5(1.3 - 0.2x) / 0.3 = 2.3
Multiply through by 0.3:
0.12x + 0.5(1.3 - 0.2x) = 0.69
0.12x + 0.65 - 0.1x = 0.69
0.02x = 0.04
x = 2.
Substituting for x in equation 1:
0.2* 2 + 0.3y = 1.3
0.4 + 0.3y = 1.3
0.3y = 1.3 - 0.4 = 0.9
y = 3.
Check in equation 2:
0.4 * 2 + 0.5(3) = 0.8 + 1.5 = 2.3.
- Correct.
Answer:
The expression is equal to 8
Step-by-step explanation:
This is the question in proper
6t−20−32u
When u= 1/4 t= 6
We were given this, 6t−20−32u then we were given the value of u= 1/4 and that of t= 6.
All we need here is to substitute u= 1/4 t= 6 into 6t−20−32u then evaluate it as follows
6(6)-20-32(1/4)
6×6=36
32×(1/4)=8
Then merge it together and calculate it we have
=36-20-8=8
