Step-by-step explanation:
2 digit numbers are beetween 10 and 99
We are looking for numbers in wich the unit digits is less than the ten digit
we can make notice something about this numbers
0 is the smallest postive integer so all these numbers satisfy the condition
so we have now 9 numbers
here is another remark :
- 0 < 1 < 2 < 3 <4 <5 <6 < 7 < 8 < 9
numbers from 91 to 99 satisfy the condition except 99
so here are 8 other numbers
numbers from 80 to 89 satisfy the condition except 88 and 89
so here are 7 other numbers
the numbers that satisfy the keeps decreasing by 1 each time
- 8 (91⇒98)
- 7 81⇒88 + 80
- 6 71⇒76 + 70
- 5 61⇒ 65 +60
- 4 51⇒ 54 + 50
- 3 41⇒ 43 + 40
- 2 31⇒32 + 30
- 1 21 + 20
so the total number of numbers that satisfy the condition
9+8+7+6+5+4+3+2+1= 45
Answer:
I beleve the answer is C
Step-by-step explanation:
Answer: y= 4
Step-by-step explanation:
16y-12= 53 add 12 on each side
16y= 65
Divide by 16
4.0625
The measure of angle 4 is 45°
9514 1404 393
Answer:
17 > x+1
Step-by-step explanation:
You can add or subtract any number from both sides to get an equality with the same meaning:
17 > x+1
0 > x-16
You can multiply or divide by any number (except division by 0) to get an equality with the same meaning. If the multiplier (or divisor) is negative, the comparison changes direction.
-16 < -x
48 > 3x