Answer:
6
Step-by-step explanation:
first you do -3+6 which is 3.
then, u do -3+5 which is 2
multiply it and u get 6
A) On the first place we can put 9 digits, on the second 9, on the third place 8 and on the last place 7 ( because no digits can be repeated ):
9 · 9 · 8 · 7 =4536 numbers
b) There are 5 odd digits can be repeated. So:
5 · 10 · 10 · 5 = 2500 numbers
c) On the first place we can put:5,6,7,8,9 (5 digits) On the last place is just one (0), because the number must be divisible by 10:
5 · 10 · 10 · 1 = 500 numbers
d) on the first place we can put 2 digits ( 1, or 2 - there are no 4-digit numbers starting with 0). The last digit must be even, but the order can be:
X - odd - odd - even 2 · 5 · 4 · 5 = 200
X - odd - even - even 2 · 5 · 5 · 4 = 200
X - even - odd - even 2 · 5 · 5 · 4 = 200
X - even - even - even 2 · 5 · 4 · 3 = 120
Finally: 200+ 200 + 200 + 120 = 720 numbers
Answer: 1.25 lawns/per hour
Step-by-step explanation:
Answer:
2x^2 - 9x - 5
Step-by-step explanation:
This is a multiplication problem; it's not an equation and thus can't be "solved." Rather: "Multiply out (2x+1)(x-5)."
(2x+1)(x-5) = 2x^2 - 10x + x - 5, or 2x^2 - 9x - 5. This is the "product" of (2x+1)(x-5).
