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UkoKoshka [18]
3 years ago
5

The population of a certain country is approximated by the following equation, where x is the number of years since 1980 and P i

s the population in millions. P= 2.726x + 126.189
Mathematics
1 answer:
saveliy_v [14]3 years ago
8 0

Answer:

235

Step-by-step explanation:

The population equation is given as P= 2.726x + 126.189

-To find the number of years since 1980, we subtract the start year from the current year(2020):

X=2020-1980=40

We substitute the x value in the population equation to find the current population:

P=2.76x+126.189 but x=40

P=2.76(40)+126.189=235.229

Rounding off then the population in the current year is 235

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Answer:

a) 7 equal sized pieces of 3/8 pounds

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b) 3 equal sized pieces of 7/8 pounds

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Step-by-step explanation:

Martin has 2 5/8 pounds of ground beef.

2 5/8 = 21/8 pounds = 2.625 pounds

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b) 3 equal sized pieces of 7/8 pounds

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3 years ago
Find the area to the right of a z score of 2.75 under a standard normal distribution curve
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DaniilM [7]

The <em>correct answers</em> are:


5x²+70x+245 ≥ 1050; and

Yes.


Explanation:


Let x be the width of the tablet. Since the width of the TV is 7 inches more than the tablet, the width of the TV would be x+7.


The length of the TV is 5 times the width; this makes the length 5(x+7) = 5x+35.


The area of the TV would be given by

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Since Andrew wants the area to be at least 1050, we set the expression greater than or equal to 1050:

(x+7)(5x+35) ≥ 1050


Multiplying this, we have:

x*5x+x*35+7*5x+7*35 ≥ 1050

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Combining like terms,

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To see if 8 is a reasonable width for the tablet, we substitute 8 for x:

5(8²)+70(8)+245 ≥ 1050

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3 years ago
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3 years ago
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Brrunno [24]

Answer:

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