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3 years ago

Find the ratio of Rs 20 and 900

Mathematics

1 answer:

Tema [17]3 years ago

8 0

Answer:

1 : 45

Step-by-step explanation:

Given

Rs 20 and 900 ( divide both by 20 )

= 1 : 45

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(-4s+9) + (4s-6) simplify

andrew11 [14]

Step-by-step explanation:

$= ( - 4s + 9) + (4s - 6)$

$= - 4s + 9 + 4s - 6$

$= - 4s + 4s +9 - 6$

Now subtract.....

$= \boxed{\sf{3}}$

hence the answer is 3 ....

hope it helped !!!!

6 0

2 years ago

i need help with this questions asap please. A grocery clerk is making a display of oranges. The numbers of oranges in the layer

ahrayia [7]

Answer:

If there is 1 at the top, then you have 1, then 2, then 3, etc.

total number of oranges equals:

1 + 2 + 3 + ... + 16 + 17 + 18 <-- stop at 18 because this is the number of oranges at the base

You can use the formula:

sum of first n numbers = n*(n + 1)/2

-->

18*19/2 = 9*19 = 171

or you can figure it out (basically derive the above formula):

you have:

1 + 18 = 19

2 + 17 = 19

3 + 16 = 19

...

How many pairs do you have? Well, it's just the number of numbers: 1-18 = 18 numbers (divide by 2) = 9 pairs)

9 pairs of 19 = 9 * 19 = 171

Hope this helps!

Step-by-step explanation:

3 0

3 years ago

Pls help fast giving brainliest

Lerok [7]

Answer:

im not sure

Step-by-step explanation:

im noy sure

3 0

3 years ago

20 Points Please help me

solong [7]

Answer:

98 inches

Step-by-step explanation:

Multiply the top length by the bottom length

4 0

3 years ago

Phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of

natali 33 [55]

Answer:

98% confidence interval: (29.25,38.87)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 34.06

Sample size, n = 134

Sample standard deviation, s = 23.83

a) 98% confidence interval

$\bar{x} \pm z_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.02} = \pm 2.33$

$34.06 \pm 2.33(\frac{23.83}{\sqrt{133}} ) = 34.06 \pm 4.81 = (29.25,38.87)$

b) If a 95% confidence interval were constructed with these data, confidence interval would be narrower as the confidence level is decreasing as compared to 98%

c) If a sample of 150 students had been studied, the width of confidence interval will decrease as the sample size increases.

8 0

3 years ago

Find the ratio of Rs 20 and 900​

Find the ratio of Rs 20 and 900