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drek231 [11]
3 years ago
5

How many two digit whole numbers are increased by 18 when their digits are reversed?

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
7 0
To reverse by adding 18, the first digit must be smaller,and the second digit must be two greater.
Start with
13 -> 31
24 -> 42
35 -> 53
46 -> 64
57 -> 75
68 ->86
79 -> 97
That should be all together 7 two digit whole numbers.
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A set of wrist watch prices are normally distributed with a mean of 767676 dollars and a standard deviation of 101010 dollars. W
Akimi4 [234]

Answer:

0.8224

Step-by-step explanation:

Data

  • mean: $76
  • standard deviation, sd: $10
  • first value of interest, x1: $63
  • second value of interest, x2: $90

z-score for x1:

z1 = (x1 - mean)/sd = (63 - 76)/10 = -1.3

z-score for x2:

z2 = (x2 - mean)/sd = (90 - 76)/10 =  1.4

The  proportion of wrist watch prices are between $63 and $90 is:

P(z1 < z < z2) = P(z < 1.4) - P(z < -1.3)

P(z < 1.4) = 0.9192 (see first picture attached)

P(z < -1.3) = 0.0968 (see second picture attached)

P(z1 < z < z2) = 0.9192 - 0.0968 = 0.8224

7 0
3 years ago
How do you divide 54,164 by 44 and show your work
sergejj [24]
To divide 54,164 by 44, we start from the first digit.

First we take the first 2 digits: i.e. 54 divided by 44, which gives 1 remainder 10.

Next, we join the next digit to the remainder and divide again by 44: i.e. 101 divided by 44, which gives 2 remainder 13.

Next, we join the next digit to the remainder and divide again by 44: i.e. 136 divided by 44, which gives 3 remainder 4.

Next, we join the next digit to the remainder and divide again by 44: i.e. 44 divided by 44, which gives 1.

We now joining all the results from our algorithm, to get that 54,164 divided by 44 is 1,231.
8 0
3 years ago
Calculate the area of the given quadrilaterals.​
nadya68 [22]

Answer:

dissect the trapezium into a square and triangle. since the triangle is a right angled one the base is 17-7=10cm

the height is found using Pythagorean theorem to be 24cm i.e 26²=x²+10²,x=√(676-100),x=√576,x=24cn

area of trapezium is (1/2)(a+b)h

a is the shorter side and b the longer side

(1/2)*(7+17)24

=288cm²

3 0
3 years ago
The side lengths of four triangles are listed below. Determine whether each triangle is a right triangle Choose Yes or No for ea
Ira Lisetskai [31]

Answer:

yes, yes, no, no

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Factor by grouping <br> x^3+2x^2-9x-18
netineya [11]

Answer:

(x+2)(x+3)(x-3)

Step-by-step explanation:

Group and factor out the greatest common factor (GCF), then combine.

Hope this helps!!

6 0
3 years ago
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