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3 years ago

Select the two values of x that are roots of this equation 2x^2+5x-3=0

Mathematics

1 answer:

alex41 [277]3 years ago

8 0

Answer:

A and D are the answer.

Step-by-step explanation:

We can factor this by grouping

$2 {x}^{2} + 5x - 3$

$2 {x}^{2} + 6x - x - 3$

$2x(x + 3) -1 (x + 3)$

The roots are

$(x + 3) = 0$

and

$2x - 1 = 0$

Let solve for zero in each roots.

$x = - 3$

$2x = 1$

$x = \frac{1}{2}$

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3 years ago

You have a wire that is 38 cm long. you wish to cut it into two pieces. one piece will be bent into the shape of a square. the o

erica [24]

Circumference + perimeter =38
x = circumference of circle
find r in terms of x
2 $\pi$ r=x
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Area= $\pi$ r^2
so..
A= $\pi$ ( $\frac{x}{2 \pi }$ )^2
= $\pi$ ( $\frac{x^{2} }{4 \pi ^{2} }$ )
= $\frac{x^{2} }{4 \pi }$

(38-x) is perimeter
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6 0

3 years ago

The sum of two consecutive odd integers is 20 less than four times the smaller of the two integers. Which the following equation

Rudiy27

Answer:

consecutive = x+x+2

x+x+2 = 4x-20

2x+2=4x-20

2=2x-20

22=2x

x=11

Numbers are 11,13.

Hope this helps plz hit the crown :D

8 0

3 years ago

The bar graph below displays students’ responses to the question "What caffeinated drinks do you consume?”

alekssr [168]

Answer:

I don't know see the bar graph BUT i do know some caffeinated drinks students would consume. Coffee, Soda, Tea, & Energy Drinks.

Step-by-step explanation:

8 0

3 years ago

(-3/2)x - 9 = - 27 solve for x

aleksklad [387]

Answer:

x = 12

Step-by-step explanation:

Solve for x:

(-3 x)/2 - 9 = -27

Put each term in (-3 x)/2 - 9 over the common denominator 2: (-3 x)/2 - 9 = (-18)/2 - (3 x)/2:

(-18)/2 - (3 x)/2 = -27

(-18)/2 - (3 x)/2 = (-3 x - 18)/2:

(-3 x - 18)/2 = -27

Multiply both sides of (-3 x - 18)/2 = -27 by 2:

(2 (-3 x - 18))/2 = -27×2

(2 (-3 x - 18))/2 = 2/2×(-3 x - 18) = -3 x - 18:

-3 x - 18 = -27×2

2 (-27) = -54:

-3 x - 18 = -54

Add 18 to both sides:

(18 - 18) - 3 x = 18 - 54

18 - 18 = 0:

-3 x = 18 - 54

18 - 54 = -36:

-3 x = -36

Divide both sides of -3 x = -36 by -3:

(-3 x)/(-3) = (-36)/(-3)

(-3)/(-3) = 1:

x = (-36)/(-3)

The gcd of -36 and -3 is -3, so (-36)/(-3) = (-3×12)/(-3×1) = (-3)/(-3)×12 = 12:

Answer: x = 12

3 0

3 years ago