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SVETLANKA909090 [29]
3 years ago
11

The current average property value is two-sevenths more than last year’s average value. What was last year’s average property va

lue if the current average is $81,450?
Mathematics
1 answer:
Ilya [14]3 years ago
6 0

Answer:

63350

Step-by-step explanation:

Given that the current average property value is two-sevenths more than last year’s average value.

Let x be the last year's average property

Then we have as per the given information this year property value

=x+\frac{2}{7} x

Equate this to

x+\frac{2}{7} x=81450\\9x = 7(81450)\\x = 7(9050)\\x= 63350

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The sum of the squares of three consecutive integers is 509. Determine the integers.
GalinKa [24]

Answer:

12, 13, 14

Step-by-step explanation:

Denote the integers as:

x

x+1

x+2

The sum of their squares, so that would be;

(x^(2)) + (( x + 1 )^(2)) + (( x + 2 )^(2)) = 509

write out the squares

x^2 + x^2 + 2x + 1 + x^2 + 4x + 4 = 509

combine like terms

3x^2 + 6x + 5 = 509

inverse operations

3x^2 + 6x + 5 = 509

                -5     -5

3x^2 + 6x = 504

factor

3x^2 + 6x = 504

3 ( x^2 + 2x ) =504

Inverse operations

3 ( x^2 + 2x ) = 504

/3                       /3

x^2 + 2x = 168

Factor again

x ( x + 2 ) = 168

At this point, it should be obvious that x is 12 (because 12 * 14 = 168)

So now substitute back into the consecutive numbers

x = 12

x + 1 = 13

x + 2 = 14

6 0
3 years ago
Help. Also, how do you give Brainliest?
lawyer [7]

Okay so basically when two people answer your questions it should give you the option to give brainliest otherwise sometimes it takes a few days to give it to someone. And for your question does it give any number options.?

Edit: f(-1)= 1 then f(1)= -10.

4 0
3 years ago
Read 2 more answers
Which represents a unit rate? The cost of cat food is $36 per 3 bags
coldgirl [10]

Step-by-step explanation:

To find unit rate

1 bag = 36÷ 3 = 12

So unit rate = $12

3 0
3 years ago
Shelly ordered the following items below for herself and 5 teammates:
MaRussiya [10]

Answer:

30

Step-by-step explanation:

5 0
3 years ago
Cartoon=uuu
LekaFEV [45]

Answer:

three u's and an I

Step-by-step explanation:

3×3=9

that's 3 u's so if you add an I its 10

8 0
3 years ago
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