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3 years ago

7

Fatima wants to mail three parcels to three village school she finds that the postal charges are rupees 20 rupees 28 and 36 resp

ectively if she wants to buy stamps only of one denomination what is the greatest denomination of stamp she must buy to mail the three parcels

1 answer:

kicyunya [14]3 years ago

5 0

Answer:

84

Step-by-step explanation:

god bless stay safe po

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18 students which is 60% of the class, are going to Hershey park field trip in June. how many students are in the ENTIRE CLASS:

professor190 [17]

Answer:

30 students

Step-by-step explanation:

Since 18 divided by 30 is .6, you convert .6 to 60% by moving the decimals two places to the right. Hope this helps.

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3 years ago

X+2=x+10<br><br>I need to set them equal to each other. Please show workk

soldi70 [24.7K]

These cannot be set equal to each other. you know this because of the following: x + 2 = 10 + x. subtract x from both sides to get 2 = 10, which is not true. they cannot be set equal to each other.

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3 years ago

How do u solve 31 is 40% of what number? So confused?

VashaNatasha [74]

$Method\ \#1\\\\\begin{array}{ccc}31&-&40\%\\x&-&100\%\end{array}\ \ \ \ |cross\ multiply\\\\\\40x=31\cdot100\ \ \ \ |divide\ both\ sides\ by\ 40\\\\x=\frac{3100}{40}\\\\\boxed{x=77.5}$

$Method\ \#2\\\\p\%=\frac{p}{100}\to40\%=\frac{40}{100}=0.40=0.4\\\\x-the\ number\\\\40\%\ of\ the\ number\ is\ 31:\\\\0.4x=31\ \ \ \ |divide\ both\ sides\ by\ 0.4\\\boxed{x=77.5}$

6 0

4 years ago

Calculate the length of AB. Round to the nearest hundredth. If possible, explain your answer ( very much appreciated but not nee

STALIN [3.7K]

Answer:

the length of AB nearest to hundredth is 8.48 cm

Step-by-step explanation:

Pythagoras theorem states that the square of the hypotenuse side is equal to the sum of the other two sides.

Labelled the diagram as shown below.

In a right triangle BDC.

DC = 9 cm , BD = x units and BC = 12 units

then,

by Pythagoras theorem in triangle BDC

$BD^2 +DC^2 = BC^2$

Substitute the given values we have;

$x^2 + 9^2 = 12^2$

Simplify:

$x^2+81=144$

Subtract 81 from both sides we get;

$x^2 =63$ cm

Now, in triangle BDA:

AD = 3 cm and BD = x cm

Using Pythagoras theorem, to solve for AB

$BD^2 +AD^2 = AB^2$

Substitute the given values we have;

$x^2+3^2=AB^2$ .....[1]

Substitute the value of $x^2 =63$ in [1] we get;

$63+9=AB^2$

or

$AB^2= 72$

Simplify:

$AB = \sqrt{72}=8.48528137$ cm

Therefore, the length of AB nearest to hundredth is 8.48 cm

8 0

3 years ago

35 Please help with this question.

rodikova [14]

The critical values are 0.622, 0.707, 0.789 and 0.834

<h3>How to determine the critical values?</h3>

The sample size is given as:

n = 8

Calculate the degrees of freedom using

df = n - 2

So, we have:

df = 8 - 2

df = 6

Using the table of values of critical values, we have:

Critical values = 0.622, 0.707, 0.789 and 0.834

By comparing the critical values and the linear correlation coefficient, we can conclude that there is no significant linear correlation.

Read more about linear correlation at:

brainly.com/question/17237825

#SPJ1

7 0

2 years ago