2 years ago

Think about how to use the interactive tool to form an expression equivalent to –x + ( –3x) + 12 – 9.

Mathematics

2 answers:

Yuliya22 [10]2 years ago

5 0

Answer:

its a or -4x

Step-by-step explanation:

just did the test

zhuklara [117]2 years ago

3 0

Answer: a

Step-by-step explanation:

i did the question

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Solve by completing the square ( need it asap pls) <br><br> x2+18x+81=-4<br><br> -don’t send link-

Sholpan [36]

Answer:

x=2.17

Step-by-step explanation:

$x^2$ +18x+81=-4

-81 -81

$x^2$ +18x= -85

/18 /18

$x^2$ = -4.7

$\sqrt{x^2}$ = $\sqrt{-4.7}$

x= 2.17

I hope this helps :) (if it does, brainliest, please??)

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2 years ago

Solve y+4x=12 3y=8-12x

attashe74 [19]

$\left \{ {{y+4x=12} \atop {3y=8-12x}} \right. \\\\ \left \{ {{y=12-4x} \atop {3y=8-12x}} \right. \\\\3(12-4x)=8-12x\\\\36-12x=8-12x\\\\-12x+12x=8-36\\\\0\neq28\\\\There\ are\ no\ solutions.$

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3 years ago

28 squared minus 39x minus 80 equals 0

Rudik [331]

Answer:

x = 704/39 ( <----Fraction)

Step-by-step explanation:

28 squared minus 39x minus 80 equals 0

784-39x-80=0 evaluate the power

704-39x=0 Subtract the numbers

-39x=-704 move the constant to the right hand side and change it's sign

Divide on both side to get x = 704/39

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2 years ago

A necklace that is originally 24.50 is on sale for 20% off.what is the sale price of the necklace?

bearhunter [10]

Answer: $19.60

Step-by-step explanation:

24.50 x 20% or (.20)= 4.90

24.50-4.90=19.60

$19.60 is the answer

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The GCF of an odd number and an even number is always even

Oxana [17]

The answer is No it is not

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