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3 years ago

What will be the new coordinates of (3, -1) if it is reflected across the y-axis

Mathematics

1 answer:

Vaselesa [24]3 years ago

7 0

Answer:

(-3,-1)

Step-by-step explanation:

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What is -4y+7y²+7x-x+3y+x-4y

Zanzabum

Step-by-step explanation:

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3 years ago

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If a 6-foot man casts an 8-foot shadow, how tall is a tree that casts a 24-foot shadow?

noname [10]

26 , 8-6=2 so you do 24+6

8 0

3 years ago

Will mark as brainliest

lapo4ka [179]

Answer:

-1 + 2 = 1

1 + (-2) = -1

-1 - 2 = -3

1 - (-2) = 3

Step-by-step explanation

When you subtract use keep change change

Rule 1 when you add : If the signs are the same add the numbers and take the sign of the bigger number.

Rule 2 when you add : If the signs are different subtract the numbers and take the sign of the bigger number.

I wanted to help you understand and i hope i did that!

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3 years ago

One sample has Aa Aa One sample has n 10 scores and a variance of s2 20, and a second sample has n 15 scores and a variance of s

siniylev [52]

Answer:

option (a) It will be closer to 30 than to 20

Step-by-step explanation:

Data provided in the question:

For sample 1:

n₁ = 10

variance, s₁² = 20

For sample 2:

n₂ = 15

variance, s₂² = 30

Now,

The pooled variance is calculated using the formula,

$S^{2}_{p} = \frac{(n_{1}-1)\times s^{2}_{1} +(n_{2}-1)\times s^{2}_{2}}{n_{1}+n_{2}-2}$

on substituting the given respective values, we get

$S^{2}_{p} = \frac{(10-1)\times 20 +(15-1)\times 30}{10+15-2}$

$S^{2}_{p}$ = 26.0869

Hence,

the pooled variance will be closer to 30 than to 20

Therefore,

The correct answer is option (a) It will be closer to 30 than to 20

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3 years ago

What should be completed first when simplifying 2(x - 3) + 6(4x + 1)?

Over [174]

Answer:

parantheses

Step-by-step explanation:

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3 years ago