Answer:
Y=2.37
Step-by-step explanation;
Make the top equation solve for x, x=3-y
subsitute (x=3-y) into 7x-y=-3
Get 7(3-y)-y=-3
use the distributive property and get 21-7y-y=-3
Combine like terms 21-8y=-3
Subtract 21 on both sides, -8y=-19
Divide by -8 on both sides
y=2.37
Just took the test the answer is <span>(12−2x)(10−2x)x.
#k12</span>
Answer:
$120.
Step-by-step explanation:
Just multiply 4 by 5 since it makes 20. Since we know that the price for 4 people is $24, you multiply 24 by 5 since you are paying for 20 people.
Answer:
This is not very clearly written, so i will answer in a general way.
When you have two numbers, A and B, such that:
B > A
and you want to find a number between A and B, you must find a number larger than A and smaller than B.
A < x < B.
Then if we have:
13 and 12.
The largest number is 13, then we want a number smaller than 13, and larger than 12.
An option is 12.5
12< 12.5 < 13.
6.42 and 2
The largest number is 6.42, then we want a number smaller than 6.42 and larger than 2.
An option is 4.
2 < 4 < 6.42
A harder example can be:
13.24 and 13.25
We want something larger than 13.24 and smaller than 13.25
Then we can write:
13.245
This is larger than 13.24 (by 0.005)
And smaller than 13.25 (by the same amount)
13.24 < 13.245 < 13.25
Answer:
The factored form of a quadratic equation is
Where 
and 
are real numbers.
Though this form, we can deduct the parabola direction, if it opens upside or downside. Additionally, we can also deduct the x-axis interceptions, which in this case are 
and 
, they are also called the roots of the equation.
The vertex form of a quadratic equation is
Using this form we can deduct the parabola direction, if opens up or down. Also, we can deduct the vertex of the parabola, which has coordinates 
, parameters of the vertex form.
Therefore, as you can observe, the different forms of a quadratic equation can give us different information.
