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3 years ago

What's 20 + (-6 x 4) - 2 ?

Mathematics

2 answers:

VMariaS [17]3 years ago

6 0

Answer:

-6

Step-by-step explanation:

First, start with what comes with the brackets.

(-6 x 4) = -24

20 + - 24 - 2 (Positive and negative makes negative)

20 - 24 - 2 =

-4 - 2 = -6

Voila, -6

Hope this actually makes a difference in someone else's life

Zepler [3.9K]3 years ago

3 0

Answer:

-6

Step-by-step explanation:

First multiply -6 and 4 which is -24.

Then add 20 and -24 which is -4

Then subtract -4 and -2

Which is -6.

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a wire of length 200 cm is cut into two parts and each part is bent to form a square.If the area of the larger square is 9 times

diamong [38]

Answer:

The perimeter of the larger square is $150cm.$

Step-by-step explanation:

First of all, let one part of it be " $x$ "

and the other part of it " $200-x$ "

Now to solve this :

The area of the square = $L^2$

The area of one part of the square = $x^2$

The area of the other part of the square = $(200-x)^2$

$9x^2= (200-x)^2\\9x^2=40000-400x+x^2$

Now, add, $-4x^2$ to both the sides :

$9x^2-9x^2=40000-400x+x^2-9x^2\\-1(8x^2+400x-40000)=0$

Now, take out the "8" which is common :

$-8(x^2+50x-5000)=0$

Now, divide it by $-8$ :

$x^2+100x-50x-5000=0\\x(x+100)-50(x+100)=0\\(x+100)(x-50)=0\\$

$x=-100$ or $50$

So, now we know that :

One of the part is = $50cm$

And the other part is = $150cm$

Thus the perimeter of the larger square is = $150cm$

3 0

3 years ago

Is 16/3 rational or irrational?

Rudik [331]

16/3 is rational simply because it is a fraction made up of whole numbers.

Irrational numbers cannot be expressed as fractions made up of whole numbers.

5 0

2 years ago

Read 2 more answers

Tell whether the two quantities vary directly. Explain your reasoning. The cafeteria provides three meals per day.

Dafna11 [192]

Answer:

The cafeteria provides three meals per day.

Reason 1

Yes, they vary directly

As number of days increases ,Total number of meals i.e

1st day ⇒ 3

2nd day⇒6

3 rd day⇒9

4th day⇒12

......................

.........................

increases.

Total number of Meals = k×Number of days

But there is another possibility also

Reason 2

1 st day ⇒ 3

2nd day ⇒3

3rd day⇒ 3

.....................

As you can see from the above expression On each day number of meals is

constant.

So we can say that ,

On each Day=Constant amount of meal=3

So, there is no Proportionality between Days and Meal.

3 0

3 years ago

Work out x when the area is root 4 2^2 and angle C is 45 and ab are (x+2)(2x-3)

aleksandrvk [35]

Answer:

x = 2.41

Step-by-step explanation:

Area formula:

A = 1/2bh

The height is:

h = (x + 2)sin 45° = √2(x + 2)/2

Substitute the area value an set an equation:

4√2 = (2x - 3)√2(x + 2)/2
(2x - 3)(x + 2) = 8
2x² + x - 6 = 8
2x² + x - 14 = 0
D = 1 + 4*2*14 = 113
x = (-1 + √113)/4 = 2.41 (rounded)

Note. the second root ignored as negative

7 0

2 years ago

MATH QUESTION HELPPPPP MEHHHHHHHH 1 PIC INCLUDEDDDDD...

Colt1911 [192]

Answer:

I think its C

Step-by-step explanation:

sorry if it is wrong

8 0

3 years ago

What's 20 + (-6 x 4) - 2 ?​

What's 20 + (-6 x 4) - 2 ?