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agasfer [191]
3 years ago
10

The square of 9 less than a number is 3 less than the number. What is the number?

Mathematics
2 answers:
ludmilkaskok [199]3 years ago
5 0

Answer:

D. 7 or 12

Step-by-step explanation:

Just took it. Edg 2020. Hope this helps :)

alexdok [17]3 years ago
4 0

Answer:

7, 12

Step-by-step explanation:

( n-9)^2 = n-3

Foil the right

n^2 -18n +81 = n-3

Subtract n from each side

n^2 -19n +81 =-3

Add 3 to each side

n^2 -19n +84 = 0

Factor

What 2 numbers multiply to 84 and add to -19

-12*-7 = 84

-12+-7 = -19

( n-7) (n-12) =0

Using the zero product property

n-7 =0   n-12= 0

n=7  n=12

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What is the halving and doubling strategy
malfutka [58]
Halving-reduce by half or think what is fifty% of the number or divide by two
doubling-add the number you got to the same number or multiply by two

Halving Ex.:6/2=3

Doubling ex.: 9+9=18 or 6*2=12
6 0
3 years ago
Lucy is a dress maker. She sews 4/7 of a dress in 3/4 hour. Lucy sews at a constant rate. At this rate, how many dresses does Lu
MAVERICK [17]

Answer:

16/21 dresses

Step-by-step explanation:

3/4 · k hours: 4/7 · k dresses for any constant k

If we want 1 hour, then k will need to be 4/3

4/3 × 4/3 hours: 4/7 × 4/3

1 hour = 16/21 dresses

7 0
3 years ago
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nevsk [136]
Simplify \frac{5}{3}x​3​​5​​x to \frac{5x}{3}​3​​5x​​

x-\frac{5x}{3}<3x−​3​​5x​​<3


2

 

Simplify x-\frac{5x}{3}x−​3​​5x​​ to -\frac{2x}{3}−​3​​2x​​

-\frac{2x}{3}<3−​3​​2x​​<3


3

 

Multiply both sides by 33

-2x<3\times 3−2x<3×3


4

 

Simplify 3\times 33×3 to 99

-2x<9−2x<9


5

 

Divide both sides by -2−2

x>-\frac{9}{2}x>−​2​​9​​


8 0
4 years ago
Find the fourth term of a geometric sequence if a=6 and r=2. Use the formula an=ar^n-1
Vikentia [17]

Answer:

48

Step-by-step explanation:

here, we are using an = ar^n-1

so, we have to find a4= ar^4-1 = ar^3

now, putting the given values in the equation,

a4= (6)(2)^3 = 6(8) = 48

therefore, the 4th term is 48.

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8 0
3 years ago
What is the value for x in 5x+4&gt;24
Allisa [31]

Answer:

x>4

Step-by-step explanation:

Do 5x>24-4 subtract... the u have 5x>20 so you divide both sides by 5 and u get 4

3 0
3 years ago
Read 2 more answers
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