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3 years ago

8

Ir 9-6x=45, find the value of x-4

2 answers:

larisa86 [58]3 years ago

7 0

9 - 6x = 45
-9 -9
_____________
-6x = 54

x = -9

________________________
So when you plug that answer into x-4 you get -9 -4, which equals -13.

Gala2k [10]3 years ago

5 0

<span>9 - 6x = 45
</span>---- -----
-9 -9

-6x = 54

x = -9

Hope I helped:P

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2. 2x + y = -4<br> 5x + 3y = -6

Eduardwww [97]

Answer:

x=15/4,y=-8.25

Step-by-step explanation:

Well to begin with it make both y's equal so multiply the first equation by 3 making it into: 6.6x+3y=-12. next subtract this new equation by the other one making it one equation as, 1.6x=-6, simplify to get: x=15/4, or 3.75 input that into one of the equations the secound one would be easier to make it 18.75+3y=-6 simplify again, 3y=-24.75 than you get y as y=-8.25

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3 years ago

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Answer:

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Step-by-step explanation:

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8 0

3 years ago

Read 2 more answers

A leaking pond loses 20 gallons of water in 49 hours. How many gallons of water will it lose in 5 hours? Round to one decimal pl

White raven [17]

Answer:

12.25

Explanation

49/20 <em><u>(which is the same as (</u></em><em><u>4</u></em><em><u>9</u></em><em><u>÷</u></em><em><u>2</u></em><em><u>0</u></em><em><u>))</u></em><em><u> </u></em>=2.45

<em><u>Multiply</u></em><em><u> </u></em><em><u>2</u></em><em><u>.</u></em><em><u>4</u></em><em><u>5</u></em><em><u> </u></em><em><u>by</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>amount</u></em><em><u> </u></em><em><u>of</u></em><em><u> </u></em><em><u>hours</u></em><em><u> </u></em><em><u>(</u></em><em><u>5</u></em><em><u>)</u></em><em><u> </u></em>

$2.45 \times 5 = 12.25$

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5 0

3 years ago

Read 2 more answers

ASAP WILL MARK BRAINLYEST <br><br>solve these four please!!

s2008m [1.1K]

I dont know if you wanted the steps but:

x^2-4x-6=0

plug it into the equation:

$\frac{-(-4)\sqrt{(-4)^2-4(1)(-6)}}{2(1)}$

$[tex] \frac{4\sqrt{40}}{2}$ [/tex]

$\frac{4+2\sqrt{10}}{2} \frac{4-2\sqrt{10}}{2}$

$x=2+\sqrt{10}$

$x=2-\sqrt{10}$

x^2-4/3x+1/3 x=1 , x= 1/3

2x^2-3x+1=0 x=1 , x=1/2

6x^2+12x=-5

add the 5 to both sides

6x²+12x+5=0 plug the problem into the equation

x= $\frac{-12\sqrt{12^{2}-4(6)(5)}}{2(6)}$

x=[ $\frac{-12\sqrt{144-120}}{12}$

x= $\frac{-12\sqrt{24}}{12}$

x= $\frac{-12+2\sqrt{6}}{12}$ x= $\frac{-12-2\sqrt{6}}{12}$

$\frac{-6+2\sqrt{6}}{6} \frac{-6-2\sqrt{6}}{6}$

7 0

3 years ago

Which of the options below show a pair of supplementary angles? Select all that apply.

malfutka [58]

Answer:

A and C

Step-by-step explanation:

A) 160 + 20 = 180

B) 120 + 40 = 160

C) 45 + 135 = 180

D) 30 + 120 = 150

All supplementary angles must add up to 180 degrees.

8 0

3 years ago