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3 years ago

13

Find the value of given expression

20" id="TexFormula1" title=" \sqrt{9 \times 81 \times 9} " alt=" \sqrt{9 \times 81 \times 9} " align="absmiddle" class="latex-formula">

2 answers:

Kay [80]3 years ago

7 0

Answer:

√{9×81×9}=√(9²×9²)=±(9×9)=±81

Furkat [3]3 years ago

5 0

Answer:

your answer will be 81

Step-by-step explanation:

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Solve <br> 3c-5=2c+5<br> please naswer fast and I will give you 5 stars

Masja [62]

Answer:

10

Step-by-step explanation:

3c - 5 =2c +5

3c - 2c =5 +5

c=10

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Negative rational number that is not an integer

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2x+ky=7 and 4x-9y=4 find value of k if matrix of coefficients is singular

lesya [120]

Hello,

| 2 k|
|4 -9 |=6

==>2*(-9)-4*k=0
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3 years ago

So I have this question I cannot figure out 3w+w2+1=10−w

Mandarinka [93]

Answer:

<u>Answer</u><u>:</u><u> </u><u>w</u><u> </u><u>is</u><u> </u><u>1</u><u>.</u><u>6</u><u> </u><u> </u><u>or</u><u>. </u><u>-</u><u>5</u><u>.</u><u>6</u><u> </u>

Step-by-step explanation:

• I guess the question asks to find the value of w

${ \rm{3w + {w}^{2} + 1 = 10 - w }}$

• arrange the equation in a quadratic equation format. i.e; ax² + bx + c = 0

${ \rm{ {w}^{2} + (3w + w) + 1 - 10 = 0 }} \\ \\ { \rm{ {w}^{2} + 4w - 9 = 0 }}$

• let's solve the equation using the quadratic formular

$\hookrightarrow \: { \tt{w = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a} }} \\$

a is 1
b is 4
c is -9

• Substitute following the mathematical operation rules:

${ \rm{w = \frac{ - 4 \pm \sqrt{ {4}^{2} - (4 \times 1 \times - 9) } }{(2 \times 1)} }} \\ \\ { \rm{w = \frac{ - 4 \pm \sqrt{52} }{2} }}$

• split the result:

${ \rm{either \: \{w = \frac{ - 4 + \sqrt{52} }{2} \} \: \: or \: \: \{w = \frac{ - 4 - \sqrt{52} }{2} \} }} \\ \\ { \rm{either \: \{w = 1.6 \} \: \: or \: \: \{w = - 5.6 \}}}$

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2 years ago

20. What is the equation of the line that passes through the points (–2, 2) and (0, 5)? A. y = x + 5 B. y = x – 5 C. y = –3/2x +

Levart [38]

Answer:

D) y=3/2x+5

Step-by-step explanation:

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3 years ago