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Dmitrij [34]
3 years ago
9

Solve (x+4)2 – 3(x + 4) – 3 = 0 using substitution. u=

Mathematics
1 answer:
mr_godi [17]3 years ago
3 0

Answer:

Step-by-step explanation:

(x+4)2-3(x+4)-3=0

2x+8-3x-12-3=0

-1x-4-3=0

-1x-7=0

-1x=7

x=7/-1

x=-7

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Simi bought a study table for $ 9000. She sold it at a profit of 20%. How much profit did she make? What is the selling price?
pashok25 [27]

Answer:

cost price of a table=$9000

profit%=20%

Let profit be x

to find profit use formula,

profit%=profit/cost price*100

20%=x/$9000*100

20*$9000=100x

$180000/100=x

$1800=x

Now to find selling prie os a table use formula,

cost price +profit

$9000+$1800

$91800

therefore selling price of a table is $91800

Step-by-step explanation:

Hope this helps u!!

4 0
3 years ago
Write 0.00052 in scientific notation.
Kamila [148]

10 over the power of negative 4

4 0
3 years ago
The data shows the total number of employee medical leave days taken for on-the-job accidents in the first six months of the yea
Inga [223]

Answer:

90

Step-by-step explanation:

The sum of squares of the deviation from mean=sum(x-xbar)²=?

x

12

6

15

9

18

12

xbar=sumx/n

xbar=(12+6+15+9+18+12)/6=72/6=12

x      x-xbar       (x-xbar)²

12      12-12=0     0

6       6-12=-6     36

15      15-12=3      9

9       9-12=-3       9

18      18-12=6      36

12      12-12=0      0

sum(x-xbar)²=0+36+9+9+36+0=90

So, the sum of squares of the deviations from the mean is 90.

3 0
3 years ago
For her birthday party, Dina wants to invite at least 8 guests but not more than 12 guests. How many guests might she have? Name
natulia [17]
This can be represented by the inequality 8 \leq x \leq 12
As Dina wants at least 8, and no more than 12, that means 8, 9, 10,11, and 12, are applicable
4 0
3 years ago
Work out the area of a rectangle with base 18mm and perimeter 38mm
frez [133]

Answer:

684 mm squared

Step-by-step explanation:

Very simple. It's 18mm multiplied by 38 mm.

18 mm * 38 mm = 684 mm2

5 0
3 years ago
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