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3 years ago

9x+lly=15 determine if liear

Mathematics

1 answer:

Vedmedyk [2.9K]3 years ago

3 0

Answer: Yes, it is.

First you have to subtract X on both sides.

9x-9x+11y=-9x+15

equals

11y=-9x+15 (You cannot combine unlike numbers)

You divide both sides by 11.

11y/11= -9x+15/11

equals

Y= -9/11 X+15/11

Although it doesn't look so, graphing calculators online will show that this answer in linear.

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3 years ago

2v^2-12 =-12v Would really appreciate it loves❤️

Black_prince [1.1K]

For this case we have the following equation:

$2v ^ 2-12 = -12v$

Rewriting we have:

$2v ^ 2 + 12v-12 = 0$

Dividing by 2 to both sides of the equation:

$v ^ 2 + 6v-6 = 0$

We apply the quadratic formula:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have to:

$a = 1\\b = 6\\c = -6$

Substituting:

$x = \frac {-6 \pm \sqrt {6 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-6 \pm \sqrt {36 + 24}} {2}\\x = \frac {-6 \pm \sqrt {60}} {2}\\x = \frac {-6 \pm \sqrt {4 * 15}} {2}\\x = \frac {-6 \pm2 \sqrt {15}} {2}$

Thus, we have two roots:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

ANswer:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

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3 years ago

A loaf of bread weighs about 1pound. Chose all of the metric measures that are less than 1pound. 1kg 0.5kg 500g 450g 100g

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Answer: E) 450g and F) 100g

Step-by-step explanation:

A pound is approximately 0.4535 kilogrammes, so 453,5 grammes. With this information, we can determine that answers E (450 grammes) and F ( 100 grammes) are the only correct ones.

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3 years ago

9x+lly=15 determine if liear​

9x+lly=15 determine if liear