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4 years ago

Write 79/80 as a decimal number

Mathematics

2 answers:

noname [10]4 years ago

8 0

Answer:

0.9875

PLEASE GIVE ME BRAINIEST! <:)

Step-by-step explanation:

What is 79/80 as a decimal?

To write 79/80 as a decimal you have to divide numerator by the denominator of the fraction.

We divide now 79 by 80 what we write down as 79/80 and we get 0.9875

And finally we have:

79/80 as a decimal equals 0.9875

Usimov [2.4K]4 years ago

3 0

Answer:

To write 79/80 as a decimal you have to divide numerator by the denominator of the fraction.

We divide now 79 by 80 what we write down as 79/80 and we get 0.9875

And finally we have:

79/80 as a decimal equals 0.9875

Step-by-step explanation:

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Tissues are sold in packs and boxes A pack holds 20 tissues and a box holds 120 tissues Sia buys P packs of tissues and B boxes

Fynjy0 [20]

Answer:

T=120(P+B)

Step-by-step explanation:

If a pack holds 120 tissues, then P packs will hold (P×120) tissues

This implies,

1 pack : 120 tissues

P packs : 120P tissues

Also, if a box holds 120 tissues, then B boxes will (B×120) tissues

This implies,

1 box : 120 tissues

B boxes : 120B tissues

Writing a formula in terms of T, where T is the total we obtain,

T=120P +120B

Using the idea of factorization we obtain

T=120(P+B)

8 0

3 years ago

-3 1/2x - 4 = -38 1/8 How do I do this?

abruzzese [7]

Hello, I will try my best to explain this to you as simple as possible.

First, you have to pass the -4 to the other side, like this:

-3 1/2x - 4 = -38 1/8

↓

-3 1/2x = -38 1/8 - 4

Then, you have to subtract -4 from -38 1/8, like so:

-3 1/2x = -38 1/8 - 4

↓

-3 1/2x = -42 1/8

My preferred method for this next step is this:

-3 1/2x = -42 1/8

↓

-7/2x = 337/8

Then, we divide:

-7/2x = -42 1/8

↓

x = (-337/8) / (-7/2)

x = 12.0357142857

So, the answer is: 12.0357142857.

Hope this helped! c:

8 0

3 years ago

Is f(x) = 10x2 + 10, x > 0 the inverse of g(x) = <img src="https://tex.z-dn.net/?f=%5Csqrt%20%5Cfrac%7Bx-10%7D%7B10%7D" id="T

agasfer [191]

Step-by-step explanation:

$x > - \frac{ 1}{5}$

6 0

3 years ago

In a completely randomized experimental design, three brands of paper towels were tested for their ability to absorb water. Equa

arlik [135]

Answer:

Yes. At this significance level, there is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

Step-by-step explanation:

The question is incomplete:

The significance level is 0.05.

The data is:

Brand X: 91, 100, 88, 89

Brand Y: 99, 96, 94, 99

Brand Z: 83, 88, 89, 76

We have to check if there is a significant difference between the absorbency rating of each brand.

Null hypothesis: all means are equal

$H_0:\mu_x=\mu_y=\mu_z$

Alternative hypothesis: the means are not equal

$H_a: \mu_x\neq\mu_y\neq\mu_z$

We have to apply a one-way ANOVA

We start by calculating the standard deviation for each brand:

$s_x^2=30,\,\,s_y^2=6,\,\,s_z^2=35.33$

Then, we calculate the mean standard error (MSE):

$MSE=(\sum s_i^2)/a=(30+6+35.33)/3=71.33/3=23.78$

Now, we calculate the mean square between (MSB), but we previously have to know the sample means and the mean of the sample means:

$M_x=92,\,\,M_y=97,\,\,M_z=84\\\\M=(92+97+84)/3=91$

The MSB is then:

$s^2=\dfrac{\sum(M_i-M)^2}{N-1}\\\\\\s^2=\dfrac{(92-91)^2+(97-91)^2+(84-91)^2}{3-1}\\\\\\s^2=\dfrac{1+36+49}{2}=\dfrac{86}{2}=43\\\\\\\\MSB=ns^2=4*43=172$

Now we calculate the F statistic as:

$F=MSB/MSE=172/23.78=7.23$

The degrees of freedom of the numerator are:

$dfn=a-1=3-1=2$

The degrees of freedom of the denominator are:

$dfd=N-a=3*4-3=12-3=9$

The P-value of F=7.23, dfn=2 and dfd=9 is:

$P-value=P(F>7.23)=0.01342$

As the P-value (0.013) is smaller than the significance level (0.05), the null hypothesis is rejected.

There is evidence to support the claim that there is a difference in the ability of the brands to absorb water.

3 0

3 years ago

1 2/7 minus what equals 6/7

Bad White [126]

Change all mixed fractions to improper fractions.

1 2/7 = 7/7 + 2/7 = 9/7.

Subtract

9/7 - 6/7 = 3/7

3/7 is your answer

Hope this helps

5 0

4 years ago

Write 79/80 as a decimal number​

Write 79/80 as a decimal number