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3 years ago

Who is correct? Bobby or Betty

Mathematics

1 answer:

scZoUnD [109]3 years ago

3 0

Answer:

I think Betty is correct

Step-by-step explanation:

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Find the number of real number solutions for the equation. x^2-3x+8=0

melamori03 [73]

Answer:

None.

Step-by-step explanation:

The coefficients are a=1, b=-3, c=8, so the discriminant is ...

... b²-4ac = (-3)²-4(1)(8) = 9-32 = -23

This negative value means both the roots are complex.

7 0

4 years ago

Read 2 more answers

Please help me!!!! with both

loris [4]

Answer:

Part 11) $a_n=a_{n-1}-16$ , $a_1=17$

Part 2) 4+3i

Step-by-step explanation:

Part 11) write a recursive rule for the sequence

$17,1,-15,-31,...$

Let

$a_1=17\\a_2=1\\a_3=-15\\a_4=-31$

we know that

$a_2-a_1=1-17=-16$ ----> $a_2=a_1-16$

$a_3-a_2=-15-1=-16$ ----> $a_3=a_2-16$

$a_4-a_3=-31-15=-16$ ----> $a_4=a_3-16$

This is an arithmetic sequence

In an Arithmetic Sequence the difference between one term and the next is a constant, and this constant is called the common difference (d).

In this problem the common difference is equal to $d=-16$

therefore

A recursive rule for the sequence is

$a_n=a_{n-1}+d$

substitute the value of d

$a_n=a_{n-1}-16$

where

$a_1=17$

Part 12) What is the complex conjugate of 4-3i?

we know that

The <u><em>complex conjugate</em></u> of a complex number is the number with an equal real part and an imaginary part equal in magnitude but opposite in sign

we have that

the real part of the given number is 4 and the the imaginary part is -3i

the imaginary part equal in magnitude but opposite in sign is +3i

therefore

the complex conjugate of the given number is equal to

$4+3i$

6 0

3 years ago

Timothy has three buckets shaped like cylinders. He is filling the buckets with water using a scoop shaped like a cone. If the s

Ierofanga [76]

Answer:

3-5

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Does the following graph represent a function?

Vilka [71]

Answer:

Yes

Step-by-step explanation:

It passes the vertical line test or pencil test which means that it only touches one point at a time.

5 0

3 years ago

Integrate 2x/sqrt(1-x^2) dx from 0 to ½.

8_murik_8 [283]

A short-cut to accurately evaluate the given expression above is using a scientific calculator where one can include integrals and evaluate using limits. In this case, using a calculator, the answer is equal to 0.2679. One can verify this by integrating truly letting 1-x^2 as u and use its du to be substituted in the numerator

7 0

3 years ago