F(3)=5. Explanation: substitute the value of 3 given.
Answer:
4x - 3
Step-by-step explanation:
(7x - 2) - (3x - 5)
Open the bracket and observe the signs,
7x -2 - 3x + 5 ( when the minus outside the bracket multiplies minus in the bracket, it becomes plus)
Collect like terms
7x - 3x - 2 + 5
4x - 3
Can you start by writing an equation from the info
Answer: Each adult’s meal costed $15
Step-by-step explanation:
This situation can be modeled by the following equation:
2a + 3c = 42, where a = the cost of an adult’s meal, and c = the cost of a child’s meal
Since we know from the problem that a child’s meal costs $4, we know c:
2a + 3(4) = 42
At this point, we can just solve the resulting equation for a:
2a + 3(4) = 42
= 2a + 12 = 42 (simplify 3(4))
= 2a = 30 (subtract 12 from both sides)
= a = 15 (divide both sides by 2)
So, the cost of each adult’s meal was $15.
You need to represent it as 2x + 10 = 50
