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3 years ago

If x=7, is this equation true? 7 + 9x > 73

Mathematics

2 answers:

Georgia [21]3 years ago

8 0

Answer: No.

Step-by-step explanation:

9*7=63

63+7=70

70>73

bekas [8.4K]3 years ago

4 0

Nope 9 times 7 = 63+ 7= 70<73

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Find the simplest pattern and insert the missing term(s) of each sequence. 1, 5, 11, 19, 29, ___

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3 years ago

Does the point (5, 2) satisfy the inequality y < 9x + 4?

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Answer:

yes

Step-by-step explanation:

2< 9(5) + 4

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4 years ago

Shahida is 21 years old and Nasreen is 15 years old to Shahida after how many years will Shahida be twice as old as nasreen

guapka [62]

Answer:

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5 0

3 years ago

The number of different species of plants in some gardens is recorded.

PolarNik [594]

(a) The mean of the number of different species of plants in some gardens is 4.5 .

(b) The standard deviation of the number of different species of plants in some gardens is 2.12 (Approximately)

It is given in the question that the number of different species recorded are:-

1 2 3 4 4 5 5 6 7 8

We have to find the mean and standard deviation of the given data of the number of plants of different species.

(a) We know that, the formula for mean is :-

Sum of all the observations/ Total number of observations

Hence,

Mean = $\frac{1+2+3+4+4+5+5+6+7+8}{10} =\frac{45}{10}=4.5$

(b) Standard deviation = $\sqrt{\frac{Sum(X-m)^{2} }{N} }$

Where,

X = each value

m = mean

N = number of values

Hence,

$Sum(X-m)^{2} =(1-4.5)^{2}+(2-4.5)^{2}+ (3-4.5)^{2}+ (4-4.5)^{2}+ (4-4.5)^{2}+ (5-5.5)^{2}+ (5-5.5)^{2}+ (6-5.5)^{2}+ (7-5.5)^{2}+ (8-5.5)^{2}\\ \\ Sum(X-m)^{2}=(-3.5)^{2} +(-2.5)^{2}+ (-1.5)^{2}+ (-0.5)^{2}+ (-0.5)^{2}+ (0.5)^{2}+ (0.5)^{2}+ (1.5)^{2}+ (2.5)^{2}+ (3.5)^{2} \\\\$

$Sum(X-m)^2=12.25+6.25+2.25+0.25+0.25+0.25+0.25+2.25+6.25+12.25\\\\=42.5$

Standard deviation = ${\sqrt{\frac{{42.25}}{10} }} =\frac{6.7}{\sqrt{10} }=\frac{6.7}{3.16}=2.12$ (approximately).

To learn more about mean, here:-

brainly.com/question/13451489

#SPJ4

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1 year ago