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Marysya12 [62]
2 years ago
9

Jacob is solving a quadratic equation. He executes a

Mathematics
2 answers:
Yuki888 [10]2 years ago
7 0
The answer is D). A perfect square

b2 - 4ac > 0

Roots are real, unequal and rational.
Yuri [45]2 years ago
3 0

Answer:

D. A perfect Square

Step-by-step explanation:

if the discriminant b²-4ac a perfect Square then the roots will be real, rational and inequal

if it is not a perfect Square then the roots will be real irrational and inequa

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the length of a rectangle is 5 times as long as its breadth and its area is 1620 m² find area of square whose perimeter is equal
Rus_ich [418]

Answer:

Area of the square is 2916 m^{2}.

Step-by-step explanation:

Let the breadth of the rectangle be represented by w. So that;

length of rectangle = 5w

Area of rectangle = length x breadth

                             = 5w x w

1620 = 5w^{2}

divide through by 5 to have,

w^{2} = 324

w = \sqrt{324}

   = 18

Thus, the breadth of the rectangle is 18 m.

length = 5 w = 5 x 18

           = 90 m

The length of the rectangle is 90 m.

Perimeter of the rectangle = 2(l + w)

                                  = 2( 90 + 18)

                                  = 216 m

Perimeter of a square = 4l

where l is the length of its side.

Given that the perimeters of the rectangle and square are equal, then;

4l = 216

l = \frac{216}{4}

 = 54

length of the side of square is 54 m.

Therefore,

Area of square = l^{2}

                         = 54^{2}

                        = 2916

Area of the square whose perimeter is equal to that of the rectangle is 2916 m^{2}.

6 0
2 years ago
What is the value of x in the figure? (2x+15)°
Deffense [45]

Answer:

(2x + 15)° = 180°

2x = 180 - 15

2x = 165

x = 165/2

x = 82.5

6 0
2 years ago
Answer QUICK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Vaselesa [24]

Answer:

half of a number is 15

Step-by-step explanation:

An equation must contain an equality sign.

The third option is the only phrase that can be represented as an equation: \frac{x}{2}=15

8 0
3 years ago
There are 5 green marbles, 4 red marbles, and 3 yellow marbles , determine the probability that two green marbles are chosen
frez [133]
Most likely green would be chosen but since they are mixed together u will mostly get yellow
5 0
3 years ago
Find the Mean,<br> 3, 9, 13, 8, 10, 2<br> Mean<br><br><br> can someone help me?
Doss [256]

Answer:

7.5

Step-by-step explanation:

3 + 9 + 13 + 8 + 10 + 2 = 45

There are 6 numbers so we divide 45 by 6

45/6 = 7.5

7 0
2 years ago
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