3 years ago

Given the function f(x) = 7x^2 − 2x + 5. Calculate the following values:

Mathematics

1 answer:

seropon [69]3 years ago

5 0

F(3)=16 i saw this problem before so it should be the answer in the end

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IgorC [24]

Answer:

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Step-by-step explanation:

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4 0

3 years ago

Is the relationship shown by the data linear? x -9, -5, -1, 3 y -2,-7,-12, -17

Temka [501]

x y
------ -----
-9 -2
-5 -7
-1 -12
3 -17

ur x's all have a difference of 4, and ur y's all have a difference of -5...so yes, this is linear with a slope of (-7+2) / (-5 + 9) = -5/4

5 0

3 years ago

Convert the complex number z = 4 - 10i from rectangular form to polar form.

mrs_skeptik [129]

ANSWER

$r = 2 \sqrt{29} ( \cos(292 \degree) + \sin(292 \degree))$

EXPLANATION

The polar form of a complex number ,

$z = x + yi$

is given by:

$z = r( \cos( \theta) + i \sin( \theta) )$

where

$r = \sqrt{ {x}^{2} + {y}^{2} }$

The given complex number is:

$z = 4 - 10i$

$r = \sqrt{ {4}^{2} + {( - 10)}^{2} }$

$r = \sqrt{16 + 100}$

$r = \sqrt{116} = 2 \sqrt{29}$

And

$\theta= \tan^{ - 1}(\frac{ y}{x} )$

$\theta= \tan^{ - 1}(\frac{ - 10}{4} )$

$\theta= 292 \degree$

Hence the polar form is :

$r = 2 \sqrt{29} ( \cos(292 \degree) + \sin(292 \degree))$

6 0

3 years ago

What's 1 and 2/3 times 1 and 1/3?

kari74 [83]

<span>1 and 2/3 time 1 and 1/3 is 2.22222222222 which rounds to 2.</span>

6 0

3 years ago

Read 2 more answers

The sum of two numbers is 53 . The larger number is 9 more than the smaller number. What are the numbers?

Illusion [34]

x + y = 53

x -y = 9 Adding both equations

2x = 62

x = 31 y = 22

6 0

3 years ago