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3 years ago

What is the value of x

Mathematics

2 answers:

tatuchka [14]3 years ago

8 0

152% I think don’t take my word but that’s what I looks like

vekshin13 years ago

6 0

Answer:

Step-by-step explanation:

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2. y = k2 - 13k +42

bekas [8.4K]

For this case we must solve the following quadratic equation:

$y = k ^ 2-13k + 42$

With $y = 0$ we have:

$k ^ 2-13k + 42 = 0$

The roots will be given by:

$k = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

Where:

$a = 1\\b = -13\\c = 42$

Substituting:

$k = \frac {- (- 13) \pm \sqrt {(- 13) ^ 2-4 (1) (42)}} {2 (1)}\\k = \frac {13 \pm \sqrt {169-168}} {2}\\k = \frac {13 \pm \sqrt {1}} {2}\\k = \frac {13 \pm1} {2}$

Thus, we have two roots:

$k_ {1} = \frac {13 + 1} {2} = \frac {14} {2} = 7\\k_ {2} = \frac {13-1} {2} = \frac {12} {2} = 6$

Answer:

$k_ {1} = 7\\k_ {2} = 6$

6 0

3 years ago

The quarterly returns for a group of 79 mutual funds with a mean of 1.1% and a standard deviation of 4.5% can be modeled by a no

olganol [36]

Based on your question where the quarterly returns for a group of 79 mutual funds with a mean of 1.1% and the standard deviation of 4.5% can be modeled by a normal model so based on that data the possible answer among the choices is B.

5 0

3 years ago

7 - 9 + (9 - 5)^2-4x 6/-6+8-3x10? Can y'all help me? I know I just asked but I'm really bad at math!!!!

Butoxors [25]

Answer:

7 - 9 + (9 - 5)^2 - 4 (-6/6) + 8 - 3×10

-4

8 0

3 years ago

PLEASE ANSWER QUICKLY! <br> 7&8!!!

hodyreva [135]

Look at mâthwáy it will help a lot !!! i promise !

6 0

3 years ago

Need some help here IMMEDIATELY!! :(

ExtremeBDS [4]

Answer: C option

Step-by-step explanation:

Since the drawing is 5x more than real object then we have to divide the numbers

a= 35/5 = 7

b= 30/5 = 6

c= 15/3 = 3

7 0

2 years ago