(4x+5)(4x-5) is equal to 16x^2+20x-20x-25
The positive and negative 20x cancel out
Leaving you with: 16x^2 - 25
[S/N this is a pattern that shows up a decent amount. Whenever you have something that looks like (x^2-y^2) it factors out to (x+y)(x-y). It might be helpful to remember]
The next one, (4x+5)2, just follows the distributive property. Multiply both components within the parentheses bye the coefficient of 2: 8x+10
<span>186.556 celcius
</span><span>6.63 kg
it should be 21.6
yes, estimate. it did not ask for the exact, so you can just give a estimate
</span><span>Barry buys a DVD for $19.95 and a flash drive for 14.95. He gives the cashier $40. The cashier wants to know how much change to give Barry.
</span><span>you do not want to be ripped off, neither does the customer
hope this helps</span>
I got 2.1 please rate 5 stars and thanks
Answer:
d for the first and c for the second
Step-by-step explanation:
1. both are solid lines so it is or equal to something. the first line is going down by -3 and crosses the y axis at -3 so it is _>_ - 3x-3
the second line is going down at -1/2 and crosses the y axis at 2 so it is _<_ -1/2x+2
2. The point where the two lines cross is at (2.5, -6.5)
