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2 years ago

56-45÷5[90÷3{4-(25-31)}]

Mathematics

1 answer:

Gelneren [198K]2 years ago

4 0

Answer:

Step-by-step explanation:

56-45÷5[90÷3{4-(25-31)}]

56-45÷5[90÷3{4-(-6)}]

56-45÷5[90÷3x10}]

56-45÷5[90÷30}]

56-45÷5x3

56-45÷15

56-3

One this the answer

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Viktor [21]

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80km/h

Step-by-step explanation:

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2 years ago

The function f(x) = 2x2 + 3x + 5, when evaluated, gives a value of 19. What is the function’s input value?

goldenfox [79]

$f(x)=\quad 2{ x }^{ 2 }+3x+5$

Let's called the input 'z'

When we plug 'z' in the function we get ;

$f(z)=\quad 2{ z }^{ 2 }+3z+5$

And we know that, this is equal to 19, so ;

$2{ z }^{ 2 }+3z+5=\quad 19$

Let's rearrange the equation.

$2{ z }^{ 2 }+3z+5=\quad 19\\ \\ 2{ z }^{ 2 }+3z=\quad 19-5\\ \\ 2{ z }^{ 2 }+3z=\quad 14\\ \\ 2{ z }^{ 2 }+3z-14=\quad 0$

So we have a quadratic equation here.

We'll use this formula to solve it :

$\frac { -b\pm \sqrt { { b }^{ 2 }-4ac } }{ 2a }$

The formula is used in equation formed like this :

$a{ x }^{ 2 }+bx+c=0$

In our equation,

a=2 , b=3 and c=-14

Let's plug in the values in the formula to solve,

$a=2\quad b=3\quad c=-14\\ \\ \frac { -3\pm \sqrt { 9-(4\cdot 2\cdot -14) } }{ 4 } \\ \\ \frac { -3\pm \sqrt { 9-(-112) } }{ 4 } \\ \\ \frac { -3\pm \sqrt { 9+112 } }{ 4 } \\ \\ \frac { -3\pm \sqrt { 121 } }{ 4 } \\ \\ \frac { -3\pm 11 }{ 4 }$

So,

$z=\quad \frac { -3+11 }{ 4 } \quad ,\quad \frac { -3-11 }{ 4 } \\ \\ z=\quad \frac { 8 }{ 4 } \quad ,\quad \frac { -14 }{ 4 } \\ \\ z=\quad 2,\quad -\frac { 7 }{ 2 }$

So the input can be both, 2 and $-\frac{7}{2}$

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3 years ago

How many inches are in 4 meters? meters > feet inches 4 m/1 × a/b × c/d = 157.48 in. 1. b d b

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Answer:28 / 4 = -7.

Step-by-step explanation:

28 / 4 = -7.28 / 4 = -7.28 / 4 = -7.

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Answer:

Maybe ordered pair

Step-by-step explanation:

I'm guessing you meant like what is it called

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Write 7,520,000,000,000 in scientific notation ?

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Step-by-step explanation:

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56-45÷5[90÷3{4-(25-31)}]​

56-45÷5[90÷3{4-(25-31)}]