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Harlamova29_29 [7]
3 years ago
6

24=x^2-4x+3 Rewrite the equation by completing the square.

Mathematics
1 answer:
DiKsa [7]3 years ago
5 0

Answer:Let's solve your equation step-by-step.

24=x2−4x+3

Step 1: Subtract x^2-4x+3 from both sides.

24−(x2−4x+3)=x2−4x+3−(x2−4x+3)

−x2+4x+21=0

Step 2: Factor left side of equation.

(−x−3)(x−7)=0

Step 3: Set factors equal to 0.

−x−3=0 or x−7=0

x=−3 or x=7

Answer:

x=−3 or x=7

Step-by-step explanation:

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PLEASE HELP QUICK!!<br> How far will a plane travel in 6 hours if it travels at 70 miles per hour?
svetoff [14.1K]

Answer:

420 miles

Step-by-step explanation:

brainly.com/question/17501583 go to this link and link my answer plz. First 100 gets a free follow!

8 0
3 years ago
Read 2 more answers
What is the value of cos 0 given that (-2,9) is a point on the terminal side of 0?
bulgar [2K]

Answer:

The value of cos 0 = - 2 sqrt(85) /  85 = - 0.216930458

Step-by-step explanation:

cos 0 = ?

Point on the terminal side of 0 : (-2,9)=(x,y)→x=-2, y=9

cos 0 = x/r


r=sqrt(x^2+y^2)

Replacing the known values:

r=sqrt( (-2)^2+(9)^2)

r=sqrt(4+81)

r=sqrt(85)


cos 0 = x/r

cos 0 = -2 / sqrt(85) = -2/9.219544457 = -0.216930458


Rationalizing:

cos 0 = -[2 / sqrt(85)] [sqrt(85) / sqrt(85)]

cos 0 = - 2 sqrt(85) /  [sqrt(85)]^2

cos 0 = - 2 sqrt(85) /  85






3 0
4 years ago
Which inequality is true 1.5 &gt; 2 1/2, 1/2 &gt; 0.5, -2.5 &gt; -1.5, -3 1/2 &gt; - 4.5
yawa3891 [41]

Answer: D

Step-by-step explanation:

(A. 1.5 > 2 1/2

(B. 1/2 > 0.5

(C. -2.5 > -1.5

(D. -3 1/2 > - 4.5

Step 1: Convert everything to decimals or fractions so its easier to see and make it less likely to get the question wrong

Method #1: Fractions

1.5= 1 1/2

0.5= 1/2

-2.5= - 2 1/2

-1.5= - 1 1/2

-4.5= -4 1/2

Now we have:

(A. 1 1/2 > 2 1/2 --> This is wrong because 1 1/2 is supposed to be less than 2 1/2.

(B. 1/2 > 1/2 This is also wrong. 1/2 is equal to 1/2; they are obviously the same.

(C. -2 1/2 > -1 1/2 This is wrong because, in negative numbers, its sort of backwards. For example, -2 is actually less than -1 because its farther away from 0. But if they were normal positive numbers, 2 would be bigger. But here, -2 1/2 is less than -1 1/2.

(D. -3 1/2 > - 4 1/2 This is correct. -3 1/2 is closer to 0 than -4 1/2, so it has to be bigger.

Solving the problem this way gets me to: Answer= D

Method #2: Decimals (remember: same numbers, different way of writing them!!!)

(A. 1.5 > 2.5 False. 1.5 is less than 2.5

(B. 0.5 > 0.5 False. 0.5 is equal to 0.5

(C. -2.5 > -1.5 False. -2.5 is farther away from 0 so its actually smaller.

(D. -3.5 > - 4.5 True. -3.5 is closer to 0.

Doing it this way also leads me to Answer= D.

Hope this helps :)) Also can i please have brainiest? I worked pretty hard on this :D

6 0
2 years ago
Read 2 more answers
What is 0.4698 repeating decimal as fraction
Papessa [141]
The answer is 522 over 1111
4 0
4 years ago
Need help don't get this
Leona [35]
The answer is incorrect. 142 / 3 equals forty-seven with a remainder of one, and the question is saying it equals fifty-two with a remainder of four and asking whether it is true or false. If it’s the R part you’re confused about, R means remainder, or the amount left behind when the division problem is solved. Hope this helped!

7 0
4 years ago
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