3 years ago

URGENT!! I REALLY NEED HELP

Mathematics

1 answer:

Ivenika [448]3 years ago

4 0

Answer

D is the answer

Step-by-step explanation:

as I can see in the screen shot you don't need explanation lol

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Which mixed number is equal to 18/8 2 6/9 2 5/8 2 1/4 1 2/8

Galina-37 [17]

Answer: 2 1/4

Step-by-step explanation:

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2 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

Which expression is equivalent to 0? (a)(-a) a +(-a) a/-a a - (-a)

cupoosta [38]

Answer:

a - a or (a +(-a))

Step-by-step explanation:

A negative plus a positive is always zero if they have the same variable.

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3 years ago

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If the passes through points (-4,-6) and ( 2 ,6), the rate of change of the line is equal to

Delvig [45]

Answer:

Step-by-step explanation:

Use rise over run (y2 - y1) / (x2 - x1)

Plug in the points:

(6 + 6) / (2 + 4)

12/6

= 2

So, the rate of change is 2

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3 years ago

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Nostrana [21]

Annual growth rate is (1+0.15)^12. or 5.35025 or 535.025%

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3 years ago