Answer:
(A) 30x+90=300
(B) $7
Step-by-step explanation:
Let x be the roller skating rink's entrance fee for one student.
So, the entrance fee for 30 students=30x
As each student pays a $3 fee to rent skates
So, the fee for rent paid by 30 students= $3x30=$90
The total cost for the students to enter the rink and rent skates= 30x+90
As given that total fee to enter the rink and rent skates is $300.
Therefore, 30x+90=300
(A) The required equation is 30x+90=300.
(B) On solving the equation, we have
Hence, the roller skating rink's entrance fee is $7.
Answer:
See explanation below
Step-by-step explanation:
<em>R(x,y) means x and y are related</em> according to previous established relation.
For example R(x,y) could be “x<y” if x, y are integer numbers, or R(x,y) could be “x and y are friends” if x and y are people.
<em>The set which x and y belongs to, need not be the same.</em>
<em>∀x∀y R(x, y) means: for every x in a set S and every y in a set T, x and y are related.
</em>
The logical conector “and” is commutative, that is to say, the sentence “for every x in a set S and every y in a set T x and y are related” is the same as “for every y in a set T and every x in a set S x and y are related”.
This last sentence is ∀y∀x R(x, y).
So, they are the same thing.
Area is 12,960 and Perimeter is 29
Answer:
Step-by-step explanation:
We have two sides
and the preimeter
We can calculate the length of the third side:
substitute
Use the Heron's formula:
where
substitute:
Answer:
D ; 0
Step-by-step explanation: