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2 years ago

100 PTS AND BRAINLIEST ( FAST )

Mathematics

1 answer:

almond37 [142]2 years ago

4 0

Answer:

Answer/Step-by-step explanation: A. If a scatter plot shows an upward trend, it means there is a positive correlation between the x and y variables. That is, as one variable increases, the other also increases. The value of correlation coefficient, r, would be a positive value. Also, when the data points plotted are fairly far apart or moderately spread out along the line if best fit, the value of the correlation coefficient would be far from -1 but also far from 1. Therefore, if a computer software gives us a correlation coefficient of, r = 0.51, it is most likely an accurate value for the given data because it shows a positive correlation with data points moderately spread out and farther apart along the line of best fit. B. A scenario that can be written as a casual relationship for pumpkins picked can be: Number of pumpkins picked versus the amount of nutrient given per kg of fertilizer applied.

Step-b-step explanation:

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What is the correct standard equation of a circle with center (5,-1) and radius 12

Charra [1.4K]

The equation for a circle is

(x-h)² + (y-k)² = r²

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y = your given k

Let's plug everything in!

(x - 5) ² + (y - (-1)) ² = 12²

Your final equation is

(x - 5) ² + (y + 1) ² = 144

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(120x)^1/2 see attached photo for steps

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3 years ago

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Kenzie finds purple, blue, and silver space rocks while exploring, 2/3 of the rocks are purple and 3/4 of the remainder are blue

Nadya [2.5K]

Answer:

There were 36 space rocks in total.

Step-by-step explanation:

First, you need to find what fraction of the original rocks are silver.

If 2/3 are purple, then 1/3 of them are not.

If 3/4 of the remaining 1/3 are blue, then 3/4 x 1/3 = 3/12 rocks are blue.

2/3 of the rock are purple, 3/12 of them are blue, and the remaining is silver.

So, you need to do 2/3 - 3/12, then find common denominators so, 8/12 - 3/12 which = 1/12.

This means 1/12 of the rocks are silver. If there are silver rocks, you need to find a suitable equation that needs to be solved.

So:

1/12r = 3

r = 36 silver rocks

There were 36 space rocks in total.

hope this helps :)

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3 years ago

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Nathan has a collection of 220 baseball cards. He lets his brother 1/4 of his collection and sells 20% of his collection to the

tatyana61 [14]

Answer:

The baseball cards remain in Nathan’s collection is 106 cards

Explanation:

Total number of cards Nathan has= 220

Number of cards he let his brother have = 1/4 of his collection

= $\frac{1}{4} \times 220$ = 55 cards

Number of cards he sells = 20% of his collection

= $\frac{20}{100} \times 220$

=44 cards

No of cards he gives to his friends=15 cards

Remaining cards = total number of cards – (no of cards he gave to his brother+ cards he sold+ cards he gave to this friends)

= 220 – ( 55+44+15)

=220-114

=106 cards

baseball cards remain in Nathan’s collection is 106 cards

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3 years ago