Answer:
The number of students in third grade 45
Step-by-step explanation:
Given : There are 92 students in the third and fourth grades at Johnsonville Elementary.
Of these, 47 are in fourth grade.
To Find : Write an equation to find how many third graders there are. Use a question mark to represent the unknown number and solve.
Solution:
Number of students in fourth grade = 47
Let ? be the number of students in third grade
So, total number of students =
We are given that There are 92 students in the third and fourth grades
So,
Hence an equation to find how many third graders there are is and the number of students in third grade is 45.
Answer:
Four
Step-by-step explanation:
The degree of a polynomial is the highest of the degree of the monomials with non-zero co-efficient. In this problem we are given the polynomial:
The degree of the polynomial is 4.
For a polynomial of <em>n- degree </em>we have <em>n solutions counting multiplicity</em>.
So for this four degree polynomial we would have 4 solutions. Could be real or complex depending on the equation.
Answer:
Joseph's bill was $9.6.
Step-by-step explanation:
Given:
Number of cold drinks = 4
Number of subway sandwiches = 7
Total cost of cold drinks and sandwiches = $21.60
The sandwiches cost twice as much as the cold drinks
To Find:
How much was Joseph's bill = ?
Solution:
Let the cost of one cold drink be x
The cost of sandwich be y
The sandwiches cost twice as much as the cold drinks
then
y = 2x--------------------------------------(1)
Now the total amount can be represented as
4x+7y =21.60-----------------------------(2)
Substituting (1) in (2)
4x+7(2x) =21.60
4x+14x =21.60
18x =21.60
x = 1.2--------------------------------------(3)
The cost of one cold drink is $1.2
On substituting (3) in(1)
y = 2(1.2)
y = 2.4
The cost of one sandwich is $2.4
Now ,Joseph and his date had two cold drinks and three Subway sandwiches. So Joseph bill will be
=>
=>
=>(2.4) + (7.2)
= 9.6