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GREYUIT [131]
3 years ago
15

81r2 - 90r + 25 solve

Mathematics
1 answer:
Dimas [21]3 years ago
7 0
<span>81r2 - 90r + 25
=(9r +5)^2 

----------------------</span>
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Else purchased a prepaid phone card for $15. Long distance calls cost 6 cents a minute using this card. Elsa used her card only
Ede4ka [16]

Answer:

25 minutes

Step-by-step explanation:

First you subtract the original amount on the card from the remaining amount left.

So you can get the amount of money spent on that call.

$15 - $13.50 = $1.50

Then you divide that number by how much it cost per minute.

$1.50 ÷ 6 = 0.25

Then you get your answer!

She was on the phone for 25 minutes

7 0
3 years ago
A parabola has a line of symmetry x = -5. The minimum value of the quadratic function that it represents is -7. Find a possible
Ilya [14]

 

hello :<span>
<span>the parabola's equation is : f(x) = a(x-h)²+k
the verex is (h,k)
</span></span><span>line of symmetry x = h
</span><span>The minimum  or maximum value is : k 
</span>a possible equation of this parabola is :   f(x) = a(x+5)²-7
6 0
3 years ago
What are the solutions to 3n-1 &gt; 8 or 4n+ 3 ​
Mandarinka [93]

Answer:

n>3

Step-by-step explanation:

Step 1: Add 1 to both sides.

3n−1+1>8+1

3n>9

Step 2: Divide both sides by 3.

3n/3>9/3

n>3

3 0
2 years ago
Read 2 more answers
Tell weather the given value is a solution of the inequality
natta225 [31]
Yes, 8 is a solution

r - 3 ≤ 9; r  = 8

plug in 8 to r

(8) - 3 ≤ 9
5 ≤ 9 (true)

hope this helps
4 0
3 years ago
Read 2 more answers
Please show work thank you
sasho [114]
3 x3 = 9 4 x 3 =12   6 x 2 = 18  3 x
6 0
3 years ago
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