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Anika [276]
3 years ago
14

Use the digits 0-9, find out how many 4 digit numbers can be configured based on the stated conditions:

Mathematics
1 answer:
Alexeev081 [22]3 years ago
3 0
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
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3 years ago
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BARSIC [14]
I'm going to use the slope formula which is
m = (y2 - y1)/(x2 - x1)
where (x1,y1) and (x2,y2) are the two points the line goes through

Slope of line PQ
m = (y2 - y1)/(x2 - x1)
m = (-6 - 8)/(-5 - (-7))
m = (-6 - 8)/(-5 + 7)
m = (-14)/(2)
m = -7
The slope of line PQ is -7

Slope of RS
m = (y2 - y1)/(x2 - x1)
m = (0 - (-5))/(-2 - 3)
m = (0 + 5)/(-2 - 3)
m = (5)/(-5)
m = -1
The slope of line RS is -1

Because the slopes are NOT equal (one is -7 and the other is -1), this means the lines are NOT parallel.

-----------------------------------------------------------------------------------------------------

Answer: Choice B) No, the lines have unequal slopes

5 0
3 years ago
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100 stickers are evenly divided between 16 children how many stickers will be left over at the end
puteri [66]

Answer:

4

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8 0
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Mr suresh had 7/9 kg of sugar. He used 1/3 of it. How much sugar did he use?​
BabaBlast [244]

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7^8 x 7^3 x 7^4 divided by 7^9 x 7^5 ASAP answer please and thankyou
sergeinik [125]

Answer:

\huge\underline\color{purple}{Answer ☘}

7 {}^{8}  \times 7 {}^{3}  \times 7 {}^{4}  \div 7 {}^{9}  \times 7 {}^{5}  \\  =  > 7 {}^{8 + 3 + 4 - 9 + 5 }  \\  =  > 7 {}^{11}

<h3>furthєr... </h3>

<h2>7¹¹ = 1977326743</h2>

<h2>———————————</h2>

\color{pink}\boxed{Additional \: \: Information♡}

properties \: that \: we \: used \: while  \\  solving \: the \: question \: are \: as \: follows -  \\  \\ x {}^{m}  \times x {}^{n}  = x {}^{m + n}  \\  \frac{x {}^{m} }{x  {}^{n} }  = x {}^{m - n}

<h2>———————————</h2>

hσpє hєlpful~

<h2>~вє вrαínlч!</h2>
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