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Ksivusya [100]
3 years ago
6

Find k such that (x+2) is a factor of (x^3-kx^2+3x+7k)

Mathematics
1 answer:
Over [174]3 years ago
4 0
X+2 =0
x= -2

subs x= -2 in the equation

(-2)^3 - k(-2)^2 +3(-2) +7k = 0
-8 - 4k - 6 +7k =0
3k = 14
k= 14/3
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Help me fill in the blanks please help
agasfer [191]

The missing values in the inequality problem are;

A = -9

B = 72

C = 22

<h3>What is the explanation for the above?</h3>

5p - 8 (p + 1) > 16 .........................   (1) Given

5 (-10) - 8 (-10 +1) > 16 ...................... (2) Given

Where P is equal to 10 [Given in the second line as given in equation 2 above; Hence,

Substitute 10 for p

⇒ 5 (-10) - 8(-10+1)>  16

⇒ -50 -8(-9) > 16

⇒ -50 + 72 > 16

Hence

22 > 16 → T

Please note that T is symbolic of "True" that is

it is true that 22 is greater than 16.

Learn more about inequality problems:

brainly.com/question/11613554

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3 0
2 years ago
If you add 15 to 3 times the mystery number you get 78 was the mystery number
andreyandreev [35.5K]
So the equation looks like this : 15*3x=78
subtract 15 from both sides:        -15      -15
then divide by 3 from both sides
to isolate the variable:                  3x=63
                                                      3/3x=63/3
                                                        x=21 (your mystery number is 21)
8 0
3 years ago
Dave drives a truck and can only drive 35 miles per day. If he drives 1,960 miles and gets paid $18 per day, how much money will
Bumek [7]

Answer: $1008

Step-by-step explanation:

Since Dave can only drive 35 miles per day and he drives 1,960 miles, this means that the number of days he used for driving will be:

= 1960 / 35

= 56 days

Since he gets paid $18 per day, the amount that he will make will be:

= $18 × 56

= $1008

5 0
3 years ago
3=x+3-5x solving multi step <br><br> I give Brainliest
Sergio039 [100]

Answer:

x = 0

Step-by-step explanation:

3 = x + 3 - 5x

3 = -4x + 3

4x = 0

x = 0

4 0
3 years ago
Read 2 more answers
The length of a rectangle is 11 m greater than the width. The area is 42 m^2. Find the length and width.
shutvik [7]
The answer is that the width is 3 m and the length will be 14 m because 3•14 = 42m² and 3+11=14
8 0
3 years ago
Read 2 more answers
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