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3 years ago

6

Rhett is solving the quadratic equation 0= x2 – 2x – 3 using the quadratic formula. Which shows the correct substitution of the

values a, b, and c into the quadratic formula?

1 answer:

posledela3 years ago

6 0

Formulas, answers and solutions are in the file.

x= (2 +- 4)/2

x1= 3; x2= -1

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Explain the different ways it is possible to add two rational numbers and get a negative number

snow_lady [41]

<u><em>Answer:</em></u>
both numbers are negative
negative number is greater than the positive number

<u><em>Explanation:</em></u>
<u>In order to add two rational numbers and get a negative value, one of two scenarios should occur:</u>
<u>1- both numbers are negative.</u>
In this case, the answer would definitely be negative as the two numbers are originally negative
<u>Examples:</u>
-9 + -2 = -9 - 2 = -11
$\frac{-1}{2} + \frac{-3}{2} = \frac{-4}{2} = -2$

<u>2- negative number is greater than the positive number</u>
In this case, the negative sign would dominate and the result would be negative
<u>Examples:</u>
-9 + 3 = -6
$\frac{-5}{6} + \frac{2}{6} = \frac{-3}{6}$

Hope this helps :)

5 0

3 years ago

Read 2 more answers

the scale on a map se oanchows 5 centimeters equals 2 kilometers what nuumber of centimeters on the map represents an actual dis

Igoryamba

12.5 cm equals 5 km.

8 0

3 years ago

Akira receives a prize at a science fair for having the most informative project. Her trophy is in the shape of a

AlekseyPX

Answer:

45 square inches

Step-by-step explanation:

Akira receives the prize at the science fair for having the most informative project her trophy is in the shape of a square pyramid and is covered in shiny gold foil how much gold foil did it take to cover the trophy including the bottom

Total surface = surface area of the base square + area of 4 triangles

Calculate the surface area of the base square

surface area of the square = s^2

where s= side length

s=3 in

The surface area of the base =s^2

=3^2

= 9 square inches

The surface area of the side triangles

The area of the triangle = (1/2)* side length* slant height

Side length=3 in

Slant height=6 in

substituting the values,

The area of the triangle =1/2*3*6

= 18/2

= 9 square inches

There are 4 triangles

The area of 4 triangles = 4 x 9

= 36 square inches

Therefore,

Total surface = surface area of the base square + area of 4 triangles

= 9 + 36

= 45 square inches

6 0

3 years ago

Trigonometric Identity help

vovikov84 [41]

Answer:

sin $\pi$ /4 * sin $\pi$ /6 = 1/2 *(cos $\pi$ /12 - cos 5 $\pi$ /12)

Step-by-step explanation:

Formula:- sinX sinY = (1/2) [ cos (X - Y) - cos (X + Y) ]

sin(π/4)sin(π/6)

= (1/2)[cos(π/4 - π/6) - cos(π/4 + π/6)]

= (1/2)[cos(3π/12 - 2π/12) - cos(3π/12 + 2π/12)]

= (1/2)[cos(π/12) - cos(5π/12)]

7 0

4 years ago

-10+7M= -10 <br> Step by step and explain .

SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

here you go mate

step 1

-10+7m= -10 equation

step 2

7m-10+10=-10+10

7m=0

step 3

$\frac{7m}{7} =\frac{0}{7}$ divide

answer

m=0

mind if i get brainliest?

6 0

3 years ago

Read 2 more answers