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4 years ago

I don’t know the answer to that one can you help me please

Mathematics

1 answer:

dybincka [34]4 years ago

4 0

Answer:

16/45

Step-by-step explanation:

Step 1: When dividing fractions, use “KFC”. It means Keep the first fraction, Flip the second one, and

Change it to multiplication

-4/20 ÷ -9/16 → -4/20 ∙ 16/-9

Step 2: Reduce any fractions if necessary, it makes multiplying them easier and you will have to reduce anyway at the end. It’s easier arithmetic to reduce at this step. The first fraction reduces because both the numerator and denominator are divisible by 4.

-1/5 ∙ 16/-9

Step 3: Multiply numerators and denominators together to get one fraction

(-16)/(-45)

Step 4: Cancel out the negatives, a negative divided by a negative is a positive. Our final answer is

16/45

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N = 9

g100num [7]

Answer:

The p-value is 0.809.

Step-by-step explanation:

In this case we need to perform a significance test for the standard deviation.

The hypothesis is defined as follows:

H₀: σ₀ = 4 vs. Hₐ: σ₀ ≤ 4

The information provided is:

n = 9

s = 3

Compute the Chi-square test statistic as follows:

$\chi^{2}=\frac{(n-1)s^{2}}{\sigma_{0}^{2}}$

$=\frac{(9-1)\cdot (3)^{2}}{(4)^{2}}\\\\=\frac{8\times 9}{16}\\\\=4.5$

The test statistic value is 4.5.

The degrees of freedom is:

df = n - 1

= 9 - 1

= 8

Compute the p-value as follows:

$p-value=P(\chi^{2}_{9}>4.5)=0.809$

*Use a Chi-square table.

Thus, the p-value is 0.809.

7 0

3 years ago

SOMEONE PLEASE HELP ITS WORTH 90 POINTS

motikmotik

Answer:

Step-by-step explanation:

The two x angles on the right are supplementary which means they add up to 180 degrees

5x + 12 + 7x - 24 = 180

12x - 12 = 180

12x = 192

x = 192/12

x = 18

5x + 12 and y are corresponding angles and are therefore equal

5(18) + 12 = 90 + 12 = 102

Therefore y = 102

3 0

3 years ago

Please answer this!!!

kenny6666 [7]

Answer:

just try to work and ask your teacher okay I have to find the key to it first

Step-by-step explanation:

3 0

3 years ago

Richard, Henry and Gavin share some sweets in the ratio 4:1:3. Richard gets 7 more sweets than Gavin. How many sweets does Henry

N76 [4]

Answer:

7 sweets for Henry

Step-by-step explanation:

Let their respective shares be 4x,x,and 3x for Richard,Henry and Gavin

If Richard gets 7 more sweets than Gavin then the difference between their shares is 7 that is

4x-3x=7

x=7

To find Henry's share,

x=7

3 0

3 years ago

HELP QUICK PLEASE!!

Ksenya-84 [330]

Answer:

it is very clear and understandable

7 0

3 years ago