The answer is 12.3 hours.
On the way to the beach, the family averaged 58 mi/h over 377 mi, so we take 377/58 to find the amount of time spent going to the beach. 377/58 = 6.5 hours.
On the way back, they averaged 65 mi/h over the same 377 mi, so we take 377/65. 377/65 = 5.8 hours.
6.5 + 5.8 = 12.3
Answer:
8
Step-by-step explanation:
In a randomnized block design, the formula for calculating the degrees of freedom for error is given by:
(r-1)(c-1)
where: r is the number of treatments and c is the number of blocks
Applying the above formula to this case;
The number of treatments is 5 and the number of blocks is 3, which means we can calculate the degrees of freedom for error as :
(5-1)x(3-1) = 4 x 2 = 8
Answer:
25
Step-by-step explanation:
54-29=25
Answer:
The base is 4cm and the height is 5cm.
Step-by-step explanation:
This is a solve the system question. Call H the height of the triangle and B the base. The question tells us:
and
Sub the first equation into the second (as H is already isolated). You will end up with a quadratic equation - solve that any way you wish (e.g. quadratic formula). I've provided the factored form below which shows you the roots:
In this question, we take B=4. You can't have a negative side length so the other answer is eliminated. Now sub the value for B into either of the original equations. I'll use the first, again because H is already isolated: