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vampirchik [111]
4 years ago
13

Write each expression in its simplest radical form. 1. √243= ? 2.√7/5=?

Mathematics
1 answer:
Mekhanik [1.2K]4 years ago
8 0
The square root is 15 and the 1/3
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How can i solve by completing the square 4r^2-28r=-49
Natalija [7]
To complete the square, the second degree term must have a coefficient of 1.
Since the second degree term here has a coefficient of 4, we start by dividing each term on both sides by 4.

4r^2 - 28r = -49

\dfrac{4r^2}{4} - \dfrac{28}{4}r = -\dfrac{49}{4}

r^2 - 7r = -\dfrac{49}{4}

Now we can complete the square.
First, we need to find what number completes the square.
We take the coefficient of the first degree term, -7 in this case.
Divide it by 2 and square it. -7 divided by 2 is the fraction -7/2.
Now we square -7/2 to get 49/4.
We add 49/4 to both sides.

r^2 - 7r + \dfrac{49}{4} = -\dfrac{49}{4} + \dfrac{49}{4}

(r - \dfrac{7}{2})^2 = 0

r - \dfrac{7}{2} = 0

r = \dfrac{7}{2}
3 0
4 years ago
The temperature today was 81F and at night it went down 11F. Which statement is
NikAS [45]

Answer:

the last one is correct 81+(-11)

it would equal 70 degrees F

8 0
3 years ago
Read 2 more answers
PLEASE HURRY!!
aksik [14]
You should just have to divide the weight lost (4.5 ounces) by the time it took for her cat to lose that weight (4 weeks)!

4.5 / 4 = 1.125, meaning her cat lost about 1.125 ounces per week!
3 0
3 years ago
25=9x+74-7<br> plz help brainz too
RideAnS [48]

Answer:

-14/3

Step-by-step explanation:

25=9x+74-7

25=9x+67

-42=9x

-42/9=9x/9

-42/9=x

-14/3=x

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3 years ago
What is the square root 0f 512
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I'm hoping it's 22.627416998
6 0
4 years ago
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