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vovikov84 [41]
3 years ago
14

Find the roots of the quadratic equation x² – 8x = 9 by completing the square. Show your work.

Mathematics
1 answer:
Artist 52 [7]3 years ago
8 0
No solutions beacause you have to factor out numbers for -9 but they must equal -8 when adding them.
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3. Decide whether each equation is true or false, and explain how you know.
BARSIC [14]

Answer:

a.false

b.true

c.false

d.I really can't get about it.

e.false

Step-by-step explanation:

So,here;

a.9.9.3=35 is given

or,243=35 (which is false)

b.7+7+7=3+3+3+3+3+3+3

or,21=21 (which is true)

c.2/3/2=2/3

or,2*2/3=2/3

or,4/3=2/3(which is false)

e.6+6+6=63

or,18=63 (which is false)

5 0
2 years ago
i need help with a math problem right now it says A car rental agency advertised renting a car for $24.95 per day and $0.26 per
Dominik [7]

Answer:

He can drive 481 miles if David rents his car for three days

Step-by-step explanation:

This is true because if you take the 24.95 and multiply it by 3, because he rented it for three days, you'll get 74.85. Then you'll subtract 200 (the total money that can be spent) by 74.85 you'll get 125.15. Divide the remaining number, 125.15 by 0.26 to get 481.34. Take the decimals away because you don't need it, if you want to be sure it's correct you can multiply 481 by 0.26 to get 125.05 which is lower than 125.15 so it good because if you use 482 besides 481 it will be higher than the amount of money David can spend, that's why 481 is the right answer.

5 0
3 years ago
What is / mean in math equation
elena-s [515]

Step-by-step explanation:

If there's a number that has for example 6/5 the / means dividing

4 0
3 years ago
Read 2 more answers
Hiiii please help ASAP I really need this :)))) please I’m praying somebody helps and gives a correct answer
Sauron [17]

Answer:

1.25

Step-by-step explanation:

100 divided by 4 = 25

60 divided by 4 = 15

30 divided by 4 = 7.5

5 divided by 4 = 1.25

3 0
2 years ago
The radius of a circle is 20cm. What is its area? ( ratio= 3.14)<br><br> ​
Musya8 [376]

Answer:

A=100π=314.16 cm 2 to 5 significant figures

Step-by-step explanation:

6 0
3 years ago
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