Answer:
Step-by-step explanation:Use the square root on both sides:
x
–
5
=
±
√
3
Add 5 to both sides:
x
=
5
±
√
3
This breaks into two equations:
x
=
5
+
√
3
and
x
=
5
−
√
3
Use the square root on both sides:
x
–
5
=
±
√
3
Add 5 to both sides:
x
=
5
±
√
3
This breaks into two equations:
x
=
5
+
√
3
and
x
=
5
−
√
3
Answer:
Step-by-step explanation:
ohn will need to sleep for 10.3 hours before his second exam so that the
he average of his two exam scores is an 80.
We were given
8 hours of sleep = 70
To get an average of 80
70+ x = 80
2
Cross multiply:
70+x = 160
x= 160-70
= 90.
If 8 hours of sleep = 70
x hours of sleep = 90
Cross multiply
8× 90 = 70 × x
720 = 70x
x = 720/70
x = 10.2857
≈ 10.3 hours of sleep
Ummm... it's upside down could you take another picture so I could help
Answer: Country A - 10machines
Country A - 1,000machines
Country A - 10,000machine
step-by-step explanation:
Since 10℅ of all machines becomes worthless every year, let's look at each country.
If 100 machines are all the machines in country A, then 10% of all the machines in country A (i.e 100 machines) will be 10% of 100 = 10 machines.
Similarly for country B, it will be equivalent to 10% of 10000, which is equal to 1,000machines.
Same goes for country C i.e 10% of 1000000 = 10,000machines are worthless.
-6 7/8 /(-3 3/4)
55/8X4/15
11/6
1 5/6
