Yes, the student's theory is correct, because the survey shows that the seventh graders spend more time playing games on the weekend than the eighth graders.
To solve this problem you must apply the following proccedure:
1. You have that <span>25-foot long board is to be cut into two parts. Then, the first equation is:
a+b=25
2. </span><span>The longer part is one foot more than twice the shorter part:
a=1+2b
3. The system of equation is:
a+b=25
a=1+2b
4. When you solve it, you obtain:
a=25-b
25-b=1+2b
25-1=2b+b
24/3=b
b=8 ft
a=1+2(8)
a=17 ft
</span>
Answer:
About 3.67
Step-by-step explanation:
1 - 1/3 = 3.66666666667
And 3.66666666667 ≈ 3.67
Answer:
Im just doing this for points .,.
Step-by-step explanation:
The rate of the westbound train is 70 miles per hour.
Step-by-step explanation:
The given is,
Two trains leave the station at the same time, one heading west and the other east.
The westbound train travels 10 miles per hours slower than the eastbound train.
If the two trains are 750 miles apart after 5 hours
Step:1
Let, X - Rate of the Eastbound train
Y - Rate of the westbound train
- (X-10)
Step:2
From the given,
T - Total distance traveled by both trains
T = 750 Miles
t = Time taken by each trains
t = 5 hours
Step:3
From the given,
T = (X+Y) × t
750 = (X × t) + (Y × t)
= 5X + 5X -50
= 10X - 50
800 = 10X
X = 80
Y = 80 - 10 = 70
Step:4
From the assumed values,
X = 80 miles per hours
Y = 70 miles per hours
Result:
The rate of the westbound train is 70 miles per hour.