3 years ago

Constructing a Perpendicular Line through a Point Not on the

Mathematics

1 answer:

nikitadnepr [17]3 years ago

8 0

I’m not sure I’m sorry :(

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51. The formula d=rt gives the

Reil [10]

Answer:

C. 56

Step-by-step explanation:

252/4.5=56

Using the formula you can get this answer

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3 years ago

Select all the expressions which have 3 as the greatest common factor of the terms.

Natalija [7]

Answer:

b+3+6c, 27n+66p ,12x + 75y + 21

Step-by-step explanation:

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3 years ago

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Mark correctly drew a heptagon on the board. How many interior angles does Mark's heptagon have?

olchik [2.2K]

There are 7 interior angles

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3 years ago

How would you do number 12 and 15?

Gnesinka [82]

Answer:

$x_1=x_2=-\dfrac{2}{3}$

Step-by-step explanation:

For the quadratic equation $ax^2+bx+c=0$ the discriminant is defined as

$D=b^2-4ac$

and the quadratic formula for the roots gives us two roots:

$x_1=\dfrac{-b-\sqrt{D}}{2a}$

and

$x_2=\dfrac{-b+\sqrt{D}}{2a}$

For the equation $9x^2 +12x+4=0$ use quadratic formula to find roots:

$D=12^2-4\cdot 9\cdot 4=144-144=0$

So,

$x_1=x_2=\dfrac{-12\pm \sqrt{0}}{2\cdot 9}=-\dfrac{12}{18}=-\dfrac{2}{3}$

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4 years ago

What is the LCM of 16 and 40 ? 24 and 40 ?

andre [41]

Answer:

80 & 120

Step-by-step explanation:

16×5 & 40×2=80

24×5 & 40×3=120

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3 years ago

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