Questions:1) 2x2 + 5x + 2 = 0

Mathematics

2 answers:

STALIN [3.7K]3 years ago

8 0

If this is a quadratic equation then the solution would be

xz_007 [3.2K]3 years ago

7 0

Answer:

x = -1/2 and -2

Step-by-step explanation:

Solve for x: Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

Using the quadratic formula: Solve the equation for x by finding a, b, and c of the quadratic then applying the quadratic formula.

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Pls anwser quickly!!!!

yawa3891 [41]

Answer:

im not sure but thanks for....... the points

8 0

3 years ago

I If the game with 3 hits is considered to be recorded in error, it might be removed from the data set. If that happens a. What

Flura [38]

Answer:

If the game with 3 hits is ignored the data becomes:

7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11

a) The mean will increase.

With 3:

(3 + 7*2 + 8*4 + 9*5 + 10*4 + 11*4)/20 = 8.9

Without 3:

(7*2 + 8*4 + 9*5 + 10*4 + 11*4)/19 = 9.21

b) The median will remain as is.

With 3 and without the median is same = 9

7 0

3 years ago

The sum of two numbers is 39. The second number is 3 more than three times the first number. Let x represent the first number an

GenaCL600 [577]

Answer:

$The\: value \:of\: the\: first\: number\:is\:9$

Step-by-step explanation:

$We\:have\:a\:system\:of\:equation:\\\left \{ {{x+y=39} \atop {3x+3=y}} \right. \\\Leftrightarrow \left \{ {{39-x=y} \atop {3x+3=39-x}} \right. \\\Leftrightarrow \left \{ {{39-x=y} \atop {4x=36}} \right. \\\Leftrightarrow \left \{ {{y=39-9} \atop {x=9}} \right. \\\Leftrightarrow \left \{ {{y=30} \atop {x=9}} \right. \\\Rightarrow x=9$