Answer:
The answer is A.
Step-by-step explanation:
So we have the two equations:
To make a substitution of the second equation into the first equation, we need to isolate the <em>y </em>variable in the second equation. Thus:
Now, we can substitute this into the first equation. Therefore:
Answer:
c
Step-by-step explanation:
We have to calculate the area of a rectangular quilt.
area of a rectangle=length x width
Data:
length=60 in=60 in(1 foot/12 in)=5 ft
width=40 in=40 in(1 foot/12 in)=3.33 ft
Area of the rectangula quilt=(5 in)(3.33 in)=16.67 ft²
Now, we have to calculate the cost of this quilt
$1.50-----------------1 ft²
x------------------------ 16.67 ft²
x=($1.5 * 16.67 ft²)/1 ft²=$25
Answer: the cost of the rectangular quilt was $25
x-intercept means f(x) = 0
(x-8)(x+9) = 0 ⇒ x = 8 or x = - 9
There are two points which are x-intercepts. They are (8,0) and (-9,0).