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Vinil7 [7]
3 years ago
14

Iiiiiiiiiiiiiiiiiiiiiiiiiiii please help :(

Mathematics
1 answer:
damaskus [11]3 years ago
8 0

Answer:C

Step-by-step explanation:

I would say D or C but d is the identity property. And C is the distributive property.

For further explanation go to -

https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-ditributive-property/a/distributive-property-explained

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Solve<br> (-4 + -7)(-3) <br> please!!!!!!!!!!!!!!!!!!!!!!!!!
miss Akunina [59]

So you add whats in parentheses first which gives you -11 then you end up with -11(-3)

Which will equal 33 Thats your final awnser...

33

6 0
2 years ago
Read 2 more answers
A snail travels 1/8 mile in 3/4 hour. The snail's speed is miles per hour.
Vera_Pavlovna [14]

9514 1404 393

Answer:

  1/6 mph

Step-by-step explanation:

To find miles per hour, divide miles by hours.

  (1/8 mi)/(3/4 h) = (1/8×4/3) mi/h = 1/6 mi/h

The snail's speed is 1/6 miles per hour.

8 0
3 years ago
Read 2 more answers
Simplify: -3(y+2)^2-5+6y<br>​
krek1111 [17]

Answer:3y^2+18y+7

:) happy to help

4 0
4 years ago
What is 17/25 as a decimal fraction? And what’s 9/12 as a decimal fraction?
Shkiper50 [21]

Answer:What is 17/25 as a decimal fraction?0.68  And what’s 9/12 as a decimal fraction? 0.75

Step-by-step explanation:

6 0
3 years ago
Dentro de 11 años, la edad de Federico será la mitad del cuadrado de la que tenía hace 13 años. Calcula la edad de Federico.
Bad White [126]

Plantearemos una ecuación cuadratica, y resolviendola veremos que Federico tiene 21 años.

<h3>¿Como plantear la ecuación que debemos resolver?</h3>

Lo primero que debemos hacer es definir la variable que vamos a usar, en este caso usare:

F = edad de Federico.

Dentro de 11 años, la edad de Federico será:

F + 11

Hace 13 años, la edad de Federico era:

F - 13

Reemplazando eso en lo que el problema plantea, tenemos:

(F + 11) = 0.5*(F - 13)^2

Ahora podemos resolver esto para F.

F + 11  = 0.5*(F^2 - 26*F +169)

F + 11 = 0.5*F^2 - 13*F + 84.5

Movemos todo al mismo lado:

F + 11 - 0.5*F^2 + 13*F - 84.5 = 0

-0.5*F^2 + 14*F - 73.5 = 0

Ahora tenemos una ecuación cuadratica, la cual resolvemos usando la formula de Bhaskara:

F = \frac{-14 \pm \sqrt{(14)^2 - 4*(-0.5)*(-73.5)} }{2*(-0.5)}  =\frac{-14 \pm 7}{-1}

Esto nos da dos valores:

  • F = (-14 + 7)/-1 = 7
  • F = (-14 - 7)/-1 = 21

El problema con el primer valor, es que es inconsistente con el enunciado, ya que en ese caso, Federico hace 13 años tendría una edad negativa. Así que <u>descartamos la primer solución</u> y nos quedamos con la segunda.

F = 21

Federico tiene 21 años.

Sí quieres aprender más sobre ecuaciones cuadraticas, puedes leer:

brainly.com/question/17102578

7 0
3 years ago
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