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4 years ago

The multipliers of this system of equations have been determined to create opposite terms of the x-variable.

Mathematics

2 answers:

Ivan4 years ago

7 0

Answer:

Step-by-step explanation:

lisov135 [29]4 years ago

3 0

Answer:

Step-by-step explanation:

negative 2 x - 8 y = negative 60

2 x + y = negative 45

-2x - 8y = -60

2x + y = -45

Adding the two equtions:

-7y = -105

y = 15

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Create a linear function that has a solution at (-2,6)

xenn [34]

(x,y) so you start at the orgin and go down two because it's negative. then you go right six and plot your point.

negative number - down or left

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4 years ago

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To practice for a competition, Sasha swam 520 meters in the pool each day for 3 weeks. How many kilometers did Sasha swim in tho

lilavasa [31]

520x21 is 10,920

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3 years ago

Assume that there are 22 frozen dinners: 12 pasta, 6 chicken, and 4 seafood dinners. The student selects 5 of them. What is the

Stells [14]

Since, there are 22 frozen dinners. Out of these, 22 are pasta, 6 chicken and 4 seafood dinners.

We have to determine the probability that at least 2 of the dinners selected are pasta dinner. At least 2 of the dinners selected are pasta, it means that there can be 2 pasta, 3 , 4 or 5.

So, Probability with at least 2 of dinners

= $\frac{(^{12}C_{2} \times ^{10}C_{3})+ (^{12}C_{3} \times ^{10}C_{2})+(^{12}C_{4} \times ^{10}C_{1})+(^{12}C_{5})}{^{22}C_{5}}$

We will use the combination formula, which states $^nC_r = \frac{n!}{r! (n-r)!}$

= $\frac{(66 \times 120)+(220 \times 45)+(495 \times 10)+(792)}{26334}$

= $\frac{7920+9900+4950+792}{26334}$

= $\frac{23562}{26334}$

= 0.894

=0.90

Therefore, the probability that at least 2 of the dinners selected are pasta is 0.90

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3 years ago

Is a linear model or a quadratic model a better fit? Quadratic model graph quadratic model linear model

fomenos

Linear model is a better fit due to my evidence of doing this answer

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3 years ago

Explain why the square root of -64 is undefined but the cubed root of -64 is defined in the real number system

sergejj [24]

Because there is no number that could be multiplied BY ITSELF and still be negative:
-2 x -2 = 4
2 x 2 = 4
But, cubed root works because a negative can be three times and still be negative:
-4 x -4 x -4 = -64
Hope this helps!

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4 years ago