x-y=21 ⇒ x=y+21
x+13=2y
Substitute y+21 for x into the equation x+13=2y
So y+21+13=2y
Simplify 34=y
So Danielle is 34 years old. Plug y back in to the original equation
x-34=21
x=55
Tony is 55 years old
Answer:
A=(1,6) B=(1,6)
Step-by-step explanation:
Its the absolotle value between them.
Answer:
12 vans
7 Buses
Step-by-step explanation:
I tried multiple versions but I finally got it right.
Since the buses can hold 25 students at a time I multiplied it by 7.
7 x 25 = 175
Then you'll need to find the remainder.
259-175 = 84
This number would be used to find the students going in the van
84/7= 12
So in total there would be 12 vans
and 7 buses
I hope this helps
Answer:
The first term is:
Step-by-step explanation:
The arithmetic sequence is defined by
where
is the first term
is the common difference
as
the 17th term of an arithmetic sequence is 51.
i.e. 
so
∵ 
, , 
∵ 
Therefore, the first term is:
Answer:
It is a function.
Step-by-step explanation:
Functions are relations in which one domain value is assigned to exactly one range value. The x-value must not repeat in the relation set for it to be a function.
{(2,3), (4,3), (6,3), (5,9), (3,9)}
There are no repeating x-values given.
The relation should be a function.
Hope this helps.
