Answer:
9. No
10. Yes
Step-by-step explanation:
The first one is not, since you have (3, 3) and (3, 9). In a function, each x maps to a single y.
The second one is since every x appears only once.
You can use substitution to solve this.
Let's look at the 2nd equation. 2x+3y=29.
In the first equation, we know that x=12-y. So, substitute that in for the 2nd equation. Do that and we have 2(12-y)+3y=29.
Distribute the 2.
24-2y+3y=29.
Combine like terms.
24+1y=29
Subtract the 24, then subtract on the other side of the equation too.
24-24=0, 29-24=5
So now we know that y=5.
Substitute this for the first equation now to find x.
x=12-5
x=7
Final answer: (7,5) or x=7 y=5
Answer:
6
Step-by-step explanation:
15 lemons = 2.5 gallons of lemonade
Divide both sides by 2.5
6 = 1
6 lemons per 1 gallon.
Hello, please consider the following.
a) You need to replace x by -1.
b) You need to replace x by 2t and simplify.
c) You need to replace x by t-2 and develop, and simplify.
Thank you.
Answer:
44
Step-by-step explanation:
to find circumference of a circle you need to multiple r (7 in here) with 2 and pi
therefore the answer is : 2x7x3 = 42 or 44 approximately
