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densk [106]
3 years ago
12

Solve the equation –15 = –6(3 + x) + 4(x – 6). X =

Mathematics
1 answer:
madam [21]3 years ago
7 0

Answer:

x=-13.5

Step-by-step explanation:

-15=-6(3+x)+4(x-6)\\-15=-18-6x+4x-24\\-15=-2x-42\\27=-2x\\x=\frac{-27}{2}

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8x²-x+x²+4x-9x²=18 <br><br>Help meee
malfutka [58]
<span>8x² - x + x² + 4x - 9x² = 18 

3x = 18             | 8x</span>² + x² - 9x² = 0<span>

x = 6                 | divide by 3

Answer: x = 6</span>
5 0
3 years ago
What is 12% of 85 im having a hard time with this question
professor190 [17]
The answer is 10.2.
Since it's a percentage, you move the decimal two places to the left which gives you 0.12. Then, you multiply that by 85 and you get 10.2.
3 0
3 years ago
If the roots of a quadratic equation are 1±√5, then the product of the roots is
Drupady [299]
The plus-minus sign represents that there are two possible outcomes.

In this case, we have 1 \pm \sqrt{5}. When we branch out the possibilities we got 2 values: 1 + \sqrt{5} and 1 - \sqrt{5}

Those are the roots of this equation. When they ask their product, they want you to multiply both numbers.

When we multiply them: (1 + \sqrt{5}) \times( 1 - \sqrt{5})

When we FOIL the we get: 1 \times 1 - 1 \times \sqrt{5} + 1 \times \sqrt{5} - \sqrt{5} \times \sqrt{5}

Simplify:
1 - \sqrt{5} + \sqrt{5} - 5
1 - 5 = 6

So the product of the two roots of this equation is 6.
5 0
4 years ago
Read 2 more answers
Help please. I need this answer and you don’t have to explain it
wariber [46]

Answer:

y=-5x+22

Step-by-step explanation:

4 0
3 years ago
last night, julie's pet hamster zoe kept julie awake for at least an hour running on her exercise wheel and scratching at the co
borishaifa [10]

Answer: x+y\geq 1, x>\frac{1}{4} ,  x\geq 2y and y\geq 0

Step-by-step explanation:

Here,  x represents the number of hours Zoe spent running on her wheel and y represents the number of hours spent scratching her cage.

Julie was awoke for at least an hour running on her exercise wheel and scratching the of her cage.

⇒ x+y\geq 1

She ran on her wheel at least twice as long as she scratched at the corners of her cage.

⇒ x\geq 2y

Also, She spent more than 1/4 hour running on her wheel.

⇒ x>\frac{1}{4}

And, we know that number of hours can not be negative.

⇒  y\geq 0

Therefore, the complete system of inequality which shows the given situation is,

x+y\geq 1, x>\frac{1}{4} and x\geq 2y, y\geq 0

Note: the feasible region ( covered by the given system) is shown in the below graph.


6 0
3 years ago
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