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3 years ago

Pleaseeee help!!!!!!!!!!!!!!!!

Mathematics

1 answer:

Ket [755]3 years ago

6 0

Answer:

A:- This polynomial has a degree of 2, so the equation x^2+x-12=0 has exactly 2 roots.

B:-The quadratic equation x^2+x-12=0 has two real solutions, x= 3 or x= -4

Step-by-step explanation:

1) A quadratic equation always has 2 real roots.

2) Solving the equation,

factorisation method,

x^2+x-12=0

x^2-3x+4x-12=0

x (x-3) +4 (x-3)=0

(x-3)(x+4)=0

thus x=3 or x=-4

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Which composition of transformations will create a pair of similar

Romashka [77]

Answer:

A rotation, then a dilation

Step-by-step explanation:

When two triangles are congruent, the three sides and angles will be the same.

A dilation is a type of transformation that works with scale factors and enlarges or reduces a figure, to create a new figure.

Now, the composition of transformations that will create a pair of similar but not congruent triangles are - a rotation, then a dilation.

8 0

3 years ago

Please only answer if your certain it will mean a lot I can give extra points or brain list if you like or a thanks please don’t

BigorU [14]

Answer:

Ms. Cortez earns 500 dollars for working 30 hours. It's the last choice.

Step-by-step explanation:

You just have to substitute 30 into the equation in place of x, since x represents hours.

f(30) = 50 + 15(30)

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3 years ago

Larry the librarian and Courtney the lawyer are having a debate. Larry contends that the library is bigger than the courthouse i

professor190 [17]

Answer:

Library's Area= 5200

Courthouse' Area= 5027

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Step-by-step explanation:

5 0

3 years ago

Please Help- <br> K + ⅓ = 5 ⅛ | K = ?<br> Show Your Reasoning.

blondinia [14]

Answer:

$4\frac{19}{24}$

Step-by-step explanation:

I hope I did this right:

So first thing to do is set up the equation.

$K + \frac{1}{3} = 5\frac{1}{8}$

Next thing to to is subtract 1/3 from both sides to get:

$K = 5\frac{1}{8} - \frac{1}{3}$

Next up, you will multiply each of the fractions by the opposing value

(multiply 1/8 by 3 and 1/3 by 8)

$K = 5\frac{3}{24}$ $-\frac{8}{24}$

Alright almost done, by multiplying 24 by 5 you get 120, that will go in the numerator to make the math a lot easier.

K = $\frac{123}{24}$ $-\frac{8}{24}$

Finally, you subtract 123 over 24 by 8 over 24.

K = $\frac{123}{24} - \frac{8}{24} = \frac{115}{24}$

Then just simplfy the 115/24 to get

$4\frac{19}{24}$

8 0

3 years ago

Ex plane how knowing 50 x 4 = 200 helps you find 500 x 400

Alex777 [14]

Answer:

Step-by-step explanation:

if you know 50*4=200, you must also know that 50*10=500 and that 4*100=400 so 500*400= 50*10*4*100

multiplication is comutative so

50*4*10*100=200*1,000= 200, 000

8 0

3 years ago

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