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andrew11 [14]
4 years ago
15

2x2-3x-5=0 using quadratic formula

Mathematics
1 answer:
saveliy_v [14]4 years ago
4 0
This formula solve by discriminant (D=b^2-4ac)

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A straight slide in a playground design makes an isosceles triangle with the
julia-pushkina [17]

Answer:

Option D.

Step-by-step explanation:

  • First, the you need ti understand that the triangle is an isosceles right angled triangle. In other words, the base and height are equal in length. The third side is the slide. This is the longest side.
  • Next, we know that the formula for calculating the area of a right angled triangle is given by:

        A = 1/2 (base × perpendicular height)

  • The perpendicular height is equal to the base. Let's say the base is <em>x</em>. It means that the height is also x, since height = base.
  • Therefore, the formula will be:

       A = 1/2 (x.x)

           =1/2 (x²)

      32 = 1/2 (x²)

     Multiplying both sides by 2 gives:

     32×2 = x²

     64  = x²

       8   = x

To find the third side, we use the Pythagoras theorem:

    C² = A² + B²

         = 8² + 8²

         = 128

   C = √128

       = 8√2

However, the answer will not be exact, so we  multiply the length of the base and height by 2. This gives x = 16 (Length of base = length of height)

Repeating the steps above gives C = √ (16)² + (16)²

                                                           = √256

This corresponds to option D.

3 0
3 years ago
What is another way to group the factors? (3x2)x5
vitfil [10]
3x(2x5) . Both of these will answer to 30. Hoped this helped !!
4 0
3 years ago
Read 2 more answers
Exterior angle theorem <br> what is the value of u? I’m willing to give brainlist!!
KengaRu [80]
Answer: 45

Explanation: two angles that form a Line always equal 180 degrees, so we start with the equation 180-u+47, which is the measure of the missing interior angle measure. All of the angles inside of a triangle also equal 180 degrees, so we can set up this equation to find U:
u-18+u+(180-u+47)=180
We can start to simplify by first simplifying what’s inside the parenthesis:
u-18+u+153-u=180
Then you solve the equation to get
U=45 degrees
4 0
2 years ago
Please look at the picture down below
Setler79 [48]

Answer:

D. 7.29.

Step-by-step explanation:

For a Normal Distribution:

Q1  = mean - (0.675) * standard deviation

= 8.5 - 0.675*1.8

= 7.285.

3 0
3 years ago
Is 4 3/4 bigger or smaller or equal to 38/12 ?
Fed [463]
4 3/4 =19/4=57/12
57/12 is larger than 38/12
8 0
3 years ago
Read 2 more answers
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