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4 years ago

Is the equation a proportuioanl relationship? x= 2y

1 answer:

3 0

A proportional change means that for every change in 1 value, it is accompanied by a change in another value that is the same every time. For example, with this, if x=1 then y=2*1=2. If we move x up 1 value to 2, y=2*2=4. Next, if we move x one more value up then 3*2=y=6. As you may notice, y adds up by 2 every time. In addition, you multiply the x value by the same number every time and only that number (no adding anything) and it is therefore a proportional equation

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Work out size of angle x

myrzilka [38]

Answer:

Step-by-step explanation:

Comment

You are given values for the adjacent side of <x and the hypotenuse of a right triangle. This defines the Cosine of an angle

Equation

Cos(x) = a/c the way you have labeled it.

Givens

a = 9

c = 18

Solution

Cos(x) = a / c

Cos(x) = 9 / 18

cos(x) = 1/2

x = cos-1(1/2)

x = 60 degrees

Answer

x = 60

7 0

2 years ago

Read 2 more answers

If f(x)=x^2 then evaluate (2+3i)

Virty [35]

Answer:

-5 + 12 i

Step-by-step explanation:

(2 + 3i)^2 = 4 + 6i + 6i + 9i^2

= 4 + 12 i + 9(-1)

= - 5 + 12 i

3 0

2 years ago

Hey, another math question

Lena [83]

Answer:

Step-by-step explanation:

By adjacent interior angles theorem,

If a transversal line 'r' intersects two parallel lines 'm' and 'n' then the consecutive interior angles are supplementary.

a° + (3x - 18)° = 180°

a° = 180° - (3x - 18)°

By vertical angles theorem,

If two straight lines intersect each other at a point, opposite angles formed are equal in measure.

180° - (3x - 18)° = (5x - 10)°

(5x - 10) + (3x - 18) = 180

(5x + 3x) - (10 + 18) = 180

8x - 28 = 180

8x = 180 + 28

8x = 208

x = 26

3 0

3 years ago

If 3 times a number minus 2 equals 13, what is the number?<br> A. –6<br> B. 5<br> C. 2<br> D. 4

rosijanka [135]

It is very important to read and understand the words of the problem before getting down to solving the given question. Numerous information's of immense importance are already given in the question. Those information's will come in handy while solving the question.
Let us assume the unknown number to be = x
Then
3x - 2 = 13
3x = 13 + 2
3x = 15
Dividing both sides of the equation by 3, we get
(3/3) * x = 15/3
1 * x = 5
x = 5
So the unknown number is 5. I hope the procedure is not very tough for you to understand.

4 0

3 years ago

Read 2 more answers

Someone please help I will make you as brainliest!!!!

solniwko [45]

Here's infinity minus 1.
$\dfrac{6}{0}(7+8)^{9}\cdot 5-1$

If you don't like that, here's 1,153,300,781,250.
$\dfrac{6}{1}(7+8)^{9}\cdot 5-0$

_____
Please note that according to the order of operations, the only denominator value is the first box after "÷".

3 0

3 years ago