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Lady bird [3.3K]
3 years ago
9

If √2 = 1.414 then find the value of (√50+√72) please solve ​

Mathematics
1 answer:
Rus_ich [418]3 years ago
8 0

Given:

\sqrt{2}=1.414

To find:

The value of \sqrt{50}+\sqrt{72}.

Solution:

We have,

\sqrt{50}+\sqrt{72}

It can be rewritten as

=\sqrt{2\times 25}+\sqrt{2\times 36}

=\sqrt{2}\times \sqrt{25}+\sqrt{2}\times \sqrt{36}        [\because \sqrt{ab}=\sqrt{a}\sqrt{b}]

=5\sqrt{2}+6\sqrt{2}

=11\sqrt{2}

Putting \sqrt{2}=1.414, we get

=11(1.414)

=15.554

Therefore, the value of given expression is 15.554.

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Find the value(s) of "k" that will cause the equation 4x^2 +kx + 4 to have one real solution.
Andreas93 [3]

Answer:  k = {8, -8}

<u>Step-by-step explanation:</u>

In order for a quadratic equation to have exactly one solution, the discriminant must equal zero.       →        b² - 4ac = 0

  4x² + kx + 4 = 0

  ↓       ↓      ↓

a=4    b=k    c=4

b² - 4ac = 0

k² - 4(4)(4) = 0

k²             = 64

           k = √64

           k = ± 8

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4 years ago
1/2y + 1/3 = -1/9 what is this answer please help
sleet_krkn [62]

Answer:

y = -8/9

Step-by-step explanation:

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3 years ago
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Solve each system of equations.
Leto [7]
1. 2(4) - 4y = 20

8 -4y = 20
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5 0
3 years ago
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Which is the approximate solution to the system y = 0.5x + 3.5 and y = − 2/3 x + 1/3 shown on the graph? (–2.7, 2.1) (–2.1, 2.7)
AlekseyPX

Answer:

The approximate solution to the system is (-2.7, 2.1).

Step-by-step explanation:

To solve the system of equations \begin{bmatrix}y=0.5x+3.5\\ y=-\frac{2}{3}x+\frac{1}{3}\end{bmatrix} you must:

\mathrm{Rationalize\:equations}\\\\\begin{bmatrix}y=\left(\frac{1}{2}\right)x+\left(\frac{7}{2}\right)\\ y=-\frac{2}{3}x+\frac{1}{3}\end{bmatrix}

\mathrm{Subsititute\:}y=-\frac{2}{3}x+\frac{1}{3}\\\\\begin{bmatrix}-\frac{2}{3}x+\frac{1}{3}=\frac{1}{2}x+\frac{7}{2}\end{bmatrix}

\mathrm{Isolate}\:x\:\mathrm{for}\:-\frac{2}{3}x+\frac{1}{3}=\frac{1}{2}x+\frac{7}{2}\\\\-\frac{2}{3}x=\frac{19}{6}+\frac{1}{2}x\\\\-\frac{7}{6}x=\frac{19}{6}\\\\6\left(-\frac{7}{6}x\right)=\frac{19\cdot \:6}{6}\\\\-7x=19\\\\x=-\frac{19}{7}\approx-2.7

\mathrm{For\:}y=-\frac{2}{3}x+\frac{1}{3}\\\\\mathrm{Subsititute\:}x=-\frac{19}{7}\\\\y=-\frac{2}{3}\left(-\frac{19}{7}\right)+\frac{1}{3}\\\\y=\frac{15}{7}\approx 2.1

The approximate solutions to the system of equations are:

x=-2.7 ,\:y=2.1

5 0
3 years ago
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Kayla has already run 8 miles on her own, and she expects to run 4 miles during each track practice. How many track practices wo
stira [4]

Answer:

7 track practices.

Step-by-step explanation:

36 miles - 8 miles she already ran= 28 miles left to run.

28 divided by 4 (miles) = 7.

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3 years ago
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