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3 years ago

How do you do this question?

Mathematics

1 answer:

madam [21]3 years ago

5 0

Answer:

Step-by-step explanation:

f"(x) < 0, which means the function is concave down at all values of x.

For any such function, within the domain of a ≤ x ≤ b, the secant line S(x) is below the curve of f(x), and the tangent line T(x) is above the curve of f(x).

Here's an example:

desmos.com/calculator/fyektbi9yl

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Please help In which table does y vary directly with x?

grigory [225]

Answer:

Table D

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y/x=k$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Verify each case

Table A

For x=1, y=3

Find the value of k

$k=y/x$ -----> $k=3/1=3$

For x=2, y=9

Find the value of k

$k=y/x$ -----> $k=9/2=4.5$

the values of k are different

therefore

The table A not represent a direct variation

Table B

For x=1, y=-5

Find the value of k

$k=y/x$ -----> $k=-5/1=-5$

For x=2, y=5

Find the value of k

$k=y/x$ -----> $k=5/2=2.5$

the values of k are different

therefore

The table B not represent a direct variation

Table C

For x=1, y=-18

Find the value of k

$k=y/x$ -----> $k=-18/1=-18$

For x=2, y=-9

Find the value of k

$k=y/x$ -----> $k=-9/2=-4.5$

the values of k are different

therefore

The table A not represent a direct variation

Table D

For x=1, y=4

Find the value of k

$k=y/x$ -----> $k=4/1=4$

For x=2, y=8

Find the value of k

$k=y/x$ -----> $k=8/2=4$

For x=3, y=12

Find the value of k

$k=y/x$ -----> $k=12/3=4$

All the values of k are equal

therefore

The table D represent a direct variation or proportional relationship

The linear equation is $y=4x$

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3 years ago

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Join my z oom id:998-0514-2461 pass:m8dGHM

xenn [34]

Answer:

ok....

Step-by-step explanation:

why?

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2 years ago

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- a. Find three pairs of numbers for which the least common multiple

Gnom [1K]

Answer:

Step-by-step explanation:

74939e+1364

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2 years ago

Kesha bought a new pair of skis for $450. She made a payment of $120 and got a student discount of $40. Her mother paid 1/2 of t

Sever21 [200]

She has $145 to left to pay.

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3 years ago

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Jessica bought 2 slices of pizza and a soda for $6.25. Alfredo bought 3 slices of pizza and a soda

Ira Lisetskai [31]

Answer:

A) 2.50

Step-by-step explanation:

subtract 8.75 and 6.25 to get the cost of 1 pizza slice since Alfredo bought 1 more pizza than Jessica.

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3 years ago

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