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lions [1.4K]
3 years ago
6

The side of a square is 3 cm smaller than one of the sides of a rectangle and 2 cm greater than its other side. Find the side of

the square, if it’s known that the area of the square is 30 cm2 less than the area of the rectangle.
Mathematics
1 answer:
inysia [295]3 years ago
5 0

Answer:

36 cm.

Step-by-step explanation:

Let, the side of the square = x cm.

As, side of the square is 3 cm less than and 2 cm more than the sides of the rectangle.

Thus, the sides of the rectangle will be (x+3) and (x-2)

<em>Also, it is given that, 'The area of the square is 30 cm² less than the area of the rectangle'.</em>

As, Area of the square = x^{2}

Area of the rectangle = (x+3)(x-2)

Thus, we have

(x+3)(x-2)-x^{2}=30

i.e. x^2-2x+3x-6-x^{2}=30

i.e. x-6=30

i.e. x=36

Thus, the side of the square is 36 cm.


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The mean of a certain set of measurements is 27 with a standard deviation of 14. The distribution of the
Talja [164]

Answer:

Exactly 16%.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

The mean of a certain set of measurements is 27 with a standard deviation of 14.

This means that \mu = 27, \sigma = 14

The proportion of measurements that is less  than 13 is

This is the p-value of Z when X = 13, so:

Z = \frac{X - \mu}{\sigma}

Z = \frac{13 - 27}{14}

Z = -1

Z = -1 has a p-value of 0.16, and thus, the probability is: Exactly 16%.

8 0
2 years ago
Please help...
Aleksandr [31]
To do this you have to times the number of fabric by the length of each fabric
so you have 6*5/8=30/8=15/4 or 3.75
8 0
2 years ago
PLS HELP WILL GIVE BRAINLY!!
cricket20 [7]

Answer:

Step-by-step explanation:

1 milli liter = 0.135 grams

182.8 ml = 0.135 * 182.8 = 24.678 grams

7 0
3 years ago
6. The ratio of girls to boys in an astronomy
mr Goodwill [35]

oksn ethe ansetware its 738wuy79q246978t59723482709uy783271-047892=-39074-2378904-2139047=123473192709270329742109372301790

Step-by-step explanation:

6 0
2 years ago
What is 3.4 / x = 2.17/ 7.7?
adoni [48]
You could use a method called cross products to solve this proportional equation.  What you would do is multiply 3.4*7.7 =2.17*x

If multiplied correctly, your equation should be 26.18 = 2.17x

You are trying to get the variable alone on one side.  To do this, you have to undo the multiplication of the coefficient.  The opposite of multiplication is division, so you would divide both sides by 2.17.

If done correctly, your equation should now be x=<span>12.064516129

However, this can be rounded to x= approximately 12.066

</span>
4 0
2 years ago
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