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love history [14]
3 years ago
10

Help its due today ................................

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
5 0

Answer:

Add -4x to both sides--> 6x+9=4x-3 and 2x+9=-3

multiply both sides by -1/4 --> -4(5x+7)=-18 and 5x-7=4.5

multiply both sides by 1/4--> 12x+4=20x+24 and 3x+1=5x+6

multiply both sides by -4--> -5x/4=4 and 5x=-16

add -4 to both sides--> 8-10x=7+5x and 4-10x=3+5x

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What is the expression 6 times the quantity n plus 7?<br> (there is no picture for it)
lesantik [10]

Answer:

it's 6n + 7

Step-by-step explanation:

hope this helped a little bit :))

4 0
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Find x.<br> 30 degrees <br> Y<br> X<br> 5/2
4vir4ik [10]

\\ \sf\longmapsto sin30=\dfrac{5/2}{x}

\\ \sf\longmapsto x=\dfrac{2.5}{sin30}

\\ \sf\longmapsto x=2.5/0.57

\\ \sf\longmapsto x=4.3

Option D is correct

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Explain how you would round the numbers 33 and 89 to accelerate their sum
aleksandr82 [10.1K]
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If the discriminant of a quadratic equation is -4, how many solutions does the equation have?
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What are the roots of the equation 9x^2 + 54x +82 = 0 in simplest a + bi form?​
s344n2d4d5 [400]

Answer:

The roots are

<h3>x =  - 3 +  \frac{1}{3}  i \:  \:  \: or \:  \:  \: x =  - 3 -  \frac{1}{3} i \\</h3>

Step-by-step explanation:

9x² + 54x + 82 = 0

Using the quadratic formula

That's

<h3>x =  \frac{ - b\pm \sqrt{ {b}^{2}  - 4ac} }{2a}</h3>

From the question

a = 9 , b = 54 , c = 82

Substitute the values into the above formula and solve

That's

<h3>x =  \frac{ - 54\pm \sqrt{ {54}^{2}  - 4(9)(82)} }{2(9)}  \\ x =  \frac{ - 54\pm \sqrt{2916 - 2952} }{18}  \\ x =  \frac{ - 54\pm \sqrt{ - 36} }{18}  \\ x =  \frac{ - 54\pm 6i}{18}</h3>

Separate the real and imaginary parts

That's

<h3>x =  -  \frac{54}{18} \pm \frac{6}{18}  \: i \\ x =  - 3\pm \frac{1}{3} i</h3>

We have the final answer as

<h3>x =  - 3 +  \frac{1}{3}  i \:  \:  \: or \:  \:  \: x =  - 3 -  \frac{1}{3} i \\</h3>

Hope this helps you

5 0
3 years ago
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