12a
math: 68/85 * 100 = 80%
science: 70*0.9 = 63 number correct
b. Science
c.48
Answer:
50°
Step-by-step explanation:
x+15+2x=90
3x=90-15=75
x=75/3=25
one acute angle=25+15=40°
other acute angle=2×25=50°
Answer:
2%, 0.2, 1/2
Step-by-step explanation:
0.2 = 0.20 = 20%
1/2 = 0.50 = 50%
2% = 0.02
This kind of problems requires to add the working velocities. The total velocity is the sum of the individual velocities.
Anita's velocity = 1 pool/8 hours
Chao's velocity = 1 pool/6 hours
Combined velocity 1/8 + 1/6 = (3 + 4)/24 = 7/24 pool/hour
Time = 1 pool / (7/24) pool/hour = 24/7 hour =3.43 hours
Answer:
2.4
Step-by-step explanation:
If you replace m with 7, the expression is now 7-4.6.
7-4.6=2.4
The value of the expression is 2.4.
-hope it helps