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melisa1 [442]
3 years ago
12

Solve each equation by either substitution or addition method.

Mathematics
1 answer:
irina [24]3 years ago
6 0

Answer: (2,2), (4,2)

First, I subtracted 2y from both sides of the second equation. Then, I substituted -2y+6 in for x in the first equation (-2y+6)²+4y²=20. Then, I expanded 4y²-24y+16+4y²=20. Next, I combined like terms, and moved everything to one side 8y²-24y+16=0. Then, I factored out an 8, and then finished factoring 8(y-2)(y-1). This gives me my y-values, y=1,2. Next, I inserted each y-value into the second equation and got x=-2(1)+6 ---> x=4 (The first solution is (4,1). ) and x=-2(2)+6----->x=2 (The second solution is (2,2).

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Roxanne likes to fish. She estimates that 30% of the fish she catches are
padilas [110]

The estimated probability that at least one of the next four fish Roxanne catches will be a perch is 34%

<h3>What is Probability ?</h3>

Probability is the likeliness of an event to happen. It has a range of 0 to 1, where 0 indicates uncertainty and 1 indicates certainty.

It is given that

0, 1, and 2 represent trout , 3 and 4 represent bass , 5 represent perch , 6, 7, 8, and 9 represent other fish

From the data it can be observed that

Total number of single digits numbers = 80

No. of Perch , "5 " = 8

Probability of getting a perch in next fish = 8/80 = 0.1

Probability that at least one of the next four fish Roxanne catches will be a perch = 1- P(no perch)

P ( no perch) = 1 - 0.1 = 0.9

for 4 fishes

= 1 - 0.9⁴

= 0.3439

= 34.39%

≈ 34%

Therefore the estimated probability that at least one of the next four fish

Roxanne catches will be a perch is 34%.

To know more about Probability

brainly.com/question/11234923

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8 0
2 years ago
When ever I look up random questions they are all trying to cheat on their tests. :/
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Step-by-step explanation:

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Use the distributive property to write an equivalent expression.<br> 7(1 – 10s + 8)
Ne4ueva [31]

Answer:

The answer is = −70s+63

Step-by-step explanation:

7(1−10s+8)

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=7−70s+56

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5 0
3 years ago
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