M = (y2-y1)/(x2-x1)
= (4-14)/3-1
= -10/2
= -5
Answer:
124 tiles
Step-by-step explanation:
2(20+40)
2(60)
120+4=124
If you're factoring, your answer is
(4x - 3)(4x + 5)
You'll work it out this way:
16x^2 + 8x - 15
Since there's no GCF here, you multiply the first and third terms, giving you -240. Your next step is to find two numbers that have a sum of 8 and a product of -240. These numbers are 20 and -12. Plug those in and you've got:
16x^2 + 20x - 12x - 15
From here you divide it into two binomials. These are (16x^2 + 20x) and (-12x - 15).
When you take out the greatest common factors (4x and -3), they become:
4x(4x + 5) - 3(4x + 5)
Then you group what's outside of the parentheses together (4x - 3)
And bring what's inside of the parentheses down (4x + 5).
This brings your answer to
(4x - 3)(4x + 5)
18 necklaces in 3 hours
18/3 = 6
6 necklaces in 1 hour
hope this helps
Answer:
3-2=1
Step-by-step explanation:
