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3 years ago

30 POINTS please help I really need help :(((((((

Mathematics

2 answers:

Veronika [31]3 years ago

8 0

Answer:

1) increase

explanation: In most plants, the uptake of CO2 through photosynthesis is reduced by a side reaction called photorespiration. The research group has now found that the CO2 increase in the atmosphere over the 20th century has shifted the balance between photosynthesis and photorespiration toward photosynthesis.

2) think its false

oksian1 [2.3K]3 years ago

6 0

Answer:

False

Step-by-step explanation:

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According to the Rational Root Theorem, what are all the potential rational roots of f(x) = 9x4 – 2x2 – 3x + 4?

Tanzania [10]

The coefficients of x4 is 9. It has factors of 1, 3, and 9. The constant is 4. It has factors of 1, 2, and 4.
The (positive and negative) ratios of the factors of the coefficient of the x4 and the constant 4 are the potential rational roots of the function.
The answers are:
1, -1, 3, -3, 9, -9, 1/2, -1/2, 3/2, -3/2, 3/4, -3/4, 9/2, -9/2, 9/4, -9/4

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2 years ago

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How many four digit numbers (0 to 9,999)

Crazy boy [7]

9000 if you don't allow numbers with leading zeros, such as 0,000.

10,000 if you do allow numbers with leading zeros.

5 0

3 years ago

If f(x)= x^2-2x+3, find the value of f (-2) and f(3)

AlexFokin [52]

Step-by-step explanation:

Given 

f(x) = x² - 2x + 3

Now

f(-2) = (-2)² - 2 * ( -2 ) + 3

 = 4 + 4 + 3

 = 11

f(3) = 3² - 2 * 3 + 3

 = 9 - 6 + 3

 = 12 - 6

 = 6

Hope it helps :)

4 0

2 years ago

A car travels 117 miles at the speed of 36 miles per hour. Find the time taken for the journey using the formula d = rt.

g100num [7]

117 divided by 36 = 3.25

So it is 3.25 hours?

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2 years ago

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4. A rectangle-shaped picture frame has a length of 4b cm and an area of 12ab² square cm. Find the width.

oksian1 [2.3K]

Answer:

$\boxed{\sf Width \ of \ the \ rectangle = 3ab}$

Given:

Length of the rectangle = 4b cm

Area of the rectangle = 12ab² square cm

To Find:

Width of the rectangle

Step-by-step explanation:

$\sf \implies Area \: of \: the \: rectangle = Length \times Width \\ \\ \sf \implies 12 a{b}^{2} = 4b \times Width \\ \\ \sf \implies Width \times 4b = 12a {b}^{2} \\ \\ \sf Divide \ both \ side \ by \ 4b: \\ \sf \implies Width \times \frac{4b}{4b} = \frac{12a {b}^{2} }{4b} \\ \\ \sf \frac{4b}{4b} = 1: \\ \sf \implies Width = \frac{12 a{b}^{2} }{4b} \\ \\ \sf \implies Width = \frac{3ab \times \cancel{4b}}{ \cancel{4b}} \\ \\ \sf \implies Width = 3ab$

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3 years ago