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Harlamova29_29 [7]
3 years ago
5

What are the solutions of the system 7x + 3y=-3 and y= -2*?

Mathematics
1 answer:
mafiozo [28]3 years ago
8 0

Answer:

opt 4

Step-by-step explanation:

when x=0, 0+3y= -3, so y=-1    (0,-1) is solution

         when x=3 , 21+3y=-3,  3y= -3-21= -24

                                                    y= -8                  (3,-8) is also solution

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(3x3 + 11x2 + 4x + 1)/ (x2 + x)
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If those are exponents, then...

3x^3 + 11x^2 + 4x + 1
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3x^3 + 10x^2 + 4x +1
-----------------------------               Cancel out the x with the 4x
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3 years ago
Enter the expression using exponents. 1\2 × 1\2 × 1\2 × 1\2 × 1\2 × 1\2 × 1\2
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Answer:

<h2>1/2⁷</h2>

Step-by-step explanation:

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3 years ago
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▹ Answer

<em>y-intercept = -6</em>

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The format of slope is:

y = mx + b

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3 years ago
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Can anyone help me on this problem? Please it doesn’t make sense to me...
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Answer:

6

Step-by-step explanation:

Cost per item is found by dividing the cost by the number of items. If the woman bought n items for $120, the cost of each item is $120/n. If the woman bought 24 more items, n+24, at the same price, then the cost per item is $120/(n+24). The problem statement tells us this last cost is $16 less than the first cost:

120/(n+24) = (120/n) -16

Multiplying by n(n+24) gives ...

120n = 120(n+24) -16(n)(n+24)

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(n +30)(n -6) = 0 . . . . . . . . . . . . . . factor the quadratic

The solutions to this are the values of n that make the factors zero: n = -30, n = 6. The negative value of n has no meaning in this context, so n=6 is the solution to the equation.

The woman bought 6 items.

_____

Check

When the woman bought 6 items for $120, she paid $120/6 = $20 for each of them. If she bought 6+24 = 30 items for the same money, she would pay $120/30 = $4 for each item. That amount, $4, is $16 less than the $20 she paid for each item.

3 0
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Answer:

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