Answer: x=3
Explain:
7x=21
21/7
Get you
3
So x equals 3
Answer:
x=-2.25,y=-2.25
Step-by-step explanation:
The given system is

We want to solve the system for x and y that makes the system true.
Let us multiply the first equation by 3 while maintaining the second equation:

Subtract the current second equation from the first one.

Divide through by 12:

From the second equation we have:

This implies that:

Answer: t=4.5x
Step-by-step explanation:
t=cups of tomatoes
x=batch(es) of pasta sauce
Example:
The chef wants to know how many tomatoes he needs to make 2 batches of pasta sauce.
x=2
So 4.5x2=9
Answer for the example is 9
Let n = number of records.
Each record costs $7, so n records cost 7n.
She then spent $3, so the total spent is 3n + 3.
She spent a total of $24, so 3n + 3 must equal 24. That gives us the following equation.
7n + 3 = 24
Subtract 3 from both sides.
7n = 21
Divide both sides by 7.
n = 3
Answer: She bought 3 records.
Answer:
x=4.34 seconds
Step-by-step explanation:
-16x^2+70x-2=0

x=4.34