Answer:
There is 30 2 pt questions and 10 4 pt questions
Step-by-step explanation:
x is number of two-point questions
y is number of four-point questions
There is a total of 100 points.
There is a total of 40 questions.
Now, we solve by substitution
Plug 30 back in to solve for y
45 pieces.
First, if the ratio is 5 : 4, then is you multiply 4 x 5 to get 20, you need to multiply 5 x 5 to get 25.
Second, 20 + 25 = 45 which is the total amount of puzzle pieces.
Hope this helps!
132
x^2+5x+6
you foil for this so
first: x times x= x^2
outer: x times 2=2x
+
inner: 3 times x=3x
last: 3 times 2=6
so x^2+2x+3x+6
combine like terms
