Answer:
B D E F
Step-by-step explanation:
a mathematical sentence makes a statement about TWO expressions. it can also use symbols or words like equals, greater than, or less than.
Answer: -30 and 30
Step-by-step explanation:
Answer: the system of inequalities are
x + y ≤ 14
18x + 38y = 342
Step-by-step explanation:
Let x represent the number of iPad chargers sold.
Let y represent the number of keyboards sold.
At the end of the day, he knows he sold a maximum of 14 items. This is expressed as
x + y ≤ 14
If he
charged $18 for each iPad charger (x) and $38 for each keyboard (y) and earned a total of $342, the expression would be
18x + 38y = 342
Answer:
cost of ice cream cones = $1.75
cost of ice cream sandwiches = $2.25
Step-by-step explanation:
Let
x = cost of ice cream cones
y = cost of ice cream sandwiches
3x + 4y = 14.25 (1)
5x + 2y = 13.25 (2)
Multiply (2) by 2
10x + 4y = 26.50 (3)
3x + 4y = 14.25 (1)
Subtract (1) from (3)
10x - 3x = 26.50 - 14.25
7x = 12.25
x = 12.25/7
x = $1.75
Substitute x = 1.75 into (1)
3x + 4y = 14.25
3(1.75) + 4y = 14.25
5.25 + 4y = 14.25
4y = 14.25 - 5.25
4y = 9
y = 9/4
y = $2.25
4n + 22 < 82 <=== ur inequality
