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Ira Lisetskai [31]
3 years ago
7

Solve using the quadratic frmula 2x^2-5x=3

Mathematics
2 answers:
Blizzard [7]3 years ago
5 0

Answer:

3 and -1/2

Step-by-step explanation:

The quadratic formula is (- b +/- \ sqrt{b^2-4ac} )/2a, for ax^2+bx+c=0.

You're equation is 2x^2-5x=3. Subtract 3 on both sides to get 2x^2-5x-3=0. Now we plug this in into the quadratic formula to get (5+/-\sqrt{25-(-24)} )/4 which is equal to (5+/- \sqrt{49} )/4 = (5+/- 7)/4.There are 2 solutions, one being (5+7)/4= 12/4= 3, and the other being (5-7)/4=-2/4=-1/2/

Mnenie [13.5K]3 years ago
4 0

2x2−5x=3

I think the first step would be to

Subtract 3 from both sides

2x2−5x−3=3−3

2x2−5x−3=0

Then

For this equation: a=2, b=-5, c=-3

2x2+−5x+−3=0

Lastly you would

Use quadratic formula with a=2, b=-5, c=-3

I think your answer would then have to be...

x = 3 or x =  −1 /2

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If the temperature outside is 60 degrees at 6 pm and then drops by 15% at 10 pm, what is the temperature at 10 pm?
Zolol [24]

Answer:

51 degrees

Step-by-step explanation:=Given data

Temperature at 6pm = 60 degrees

percent drop= 15%

= 15/100*60

=0.15*60

=9 degrees

Hence the temperature at 10 pm is 60-9= 51 degrees

6 0
3 years ago
What is the difference between rectangles b and d
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Answer: the diffrence is 2

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6 0
3 years ago
Find the perimeter and the area of the figure. A right-angled trapezoid has a shorter base of 7 centimeters, longer base of 9.5
laila [671]

The given dimensions of 9.5, 6, 7, and 6.5 cm gives the following

perimeter and area of the trapezium.

  • Perimeter: <u>29 cm</u>
  • Area: <u>49.5 cm²</u>

<h3>How can the area and perimeter of the trapezium be found?</h3>

The perimeter of a trapezoid is given as follows;

Perimeter = The sum of the lengths of the sides

Which gives;

Perimeter = 6 + 7 + 6.5 + 9.5 = 29

The perimeter of the trapezoid =<u> 29 cm</u>

  • Perimeter: 29 cm

The area of the trapezoid is given as follows;

Area = \mathbf{ \dfrac{Sum \ of \ the \ parallel \ sides }{2} \times Height}

Which gives;

Area = \dfrac{7 + 9.5 }{2} \times 6 = 49.5

The area of the trapezoid = 49.5 cm²

  • Area:<u> 49.5 cm²</u>

Learn more about the area and perimeter of geometric shapes here:

brainly.com/question/359059

brainly.com/question/11461461

8 0
2 years ago
*20 points*
raketka [301]
◆ Straight Lines ◆

Hey !!

Check the attachment.
Hope it helps you :)

6 0
3 years ago
Plz help ill give u brainlist
JulijaS [17]
Area of the 2 right triangles =2 (1/2 x 1.5 x 2 ) = 3 in²

Area of the 3 rectangles = (1.5 + 2 + 2.5) x 11 = 66 in²

Total Surface area = 3 + 66 = 69 in²

Answer:  69 in²
3 0
3 years ago
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