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3 years ago

Hi, could someone help me answer this problem ? , i don’t understand it

Mathematics

1 answer:

8_murik_8 [283]3 years ago

8 0

Answer:

$- 8xy ^{2} + 16x^{2}y$

Step-by-step explanation:

if we put together the like terms (xy^2 and x^2y) then it would be

${6xy}^{2} - {14xy}^{2} + {15x}^{2}y + {x}^{2}y$

then we combine the like terms which results in

$- 8xy^{2} + {16x}^{2}y$

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Use the substitution method to solve the system of equations.

Elan Coil [88]

A. (-3, 5) the equation is xy=-15 or x=-15/y put y=5 x=-15/5 x=-3

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3 years ago

(Before you answer I am looking for how I do it. I have the answers but I need to know an equation to do this instead of using l

Tema [17]

Answer:

14 and 16.

Step-by-step explanation:

We know that two consecutive even numbers is 30.

Let's let n be any number.

Then the first even number must be 2n.

This is because n can be any number, either even or odd. However, if we multiply it by 2, this ensures that 2n is even. Remember that any number multiplied by 2 yields an even number.

Therefore, the consecutive even number will be (2n+2). Not (2n+1), because that gives an odd number.

We know that they sum to 30. So, we can write the following equation.

$(2n)+(2n+2)=30$

And we solve from there:

$4n+2=30\\\Rightarrow4n=28\\\Rightarrow n=7$

So, the value of n is 7.

Therefore, the first even number is 7(2)=14.

And the consecutive even number is 16.

Edit: Typo

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3 years ago

How to graph 3 points f (x) = -2x + 5

Kisachek [45]

The first one is 0,5 the second one is 1,3 last one is 2,1

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4 years ago

Suppose vanilla beans cost $600 per kilogram. Julie bought 9 grams of vanilla beans. Jacques bought 70 grams of vanilla beans.

GenaCL600 [577]

The Correct option is 36.60
Step-by-step explanation:
The key to solving this question lies
around measurement
conversion,specifically converting
grams into its equivalence in
kilograms.
1000 grams equal one kilogram
9 grams=9/1000 kg
9 grams=0.009 kg
70 grams=70/1000 kg 1000 grams equal one kilogram
9 grams=9/1000 kg
9 grams=0.009 kg
70 grams=70/1000 kg
70 grams=0.07 kg
Julie pays=$600*0.009=$5.4
Jacques pays=$600*0.07=$42
Jacques pays $36.60 more ($42-
$5.4) than Julie paid
Option is wrong because that was Jacques pays=$600*0.07=$42
Jacques pays $36.60 more ($42-
$5.4) than Julie paid
Option is wrong because that was
what Julie paid
Option D is wrong because that was
what Jacques paid
Option B is obviously wrong

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2 years ago

You join an Internet service. You get the first 5 hours for free, and then you pay $2 per hour. How many hours of Internet use,

alexgriva [62]

45 / 2 = 22.5

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3 years ago

Read 2 more answers