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2 years ago

Value of x30x=30-30

Mathematics

2 answers:

Vladimir79 [104]2 years ago

5 0

Answer:

Step-by-step explanation:

$30x = 30 - 30$

$= > 30x = 0$

$= > x = \frac{0}{30}$

$= > x = 0$

Fiesta28 [93]2 years ago

4 0

Answer:

In this case, you first have to make the right side of the equal sign one number, so you'd have to do 30 - 30 which equals 0. Now you divide 30 from both sides of the equal sign, in order to get x by its self. Since you can't divide 0 by 30, your answer will just be 0/30.

So x = 0/30 or 0 .

I really hope this makes sense, and if you like this answer can you please mark me brainliest, I only need one more to reach my goal? :)

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Excel - Using the charts below how would I create an equation to calculate the cost for the other years using the annual API

Len [333]

<h3>Explanation:</h3>

If we assume that the given cost of iPhone 6s (gray cell) is cell O114, then the cells around it get filled with formulas that calculate what the column header tells you.

Cell P114 is the ratio of this year's CPI to last year's, so will have the formula ...

=N114/N113

Cell Q114 is the annual inflation rate. You can express this different ways, but the usual way is as a percentage. A percentage change is calculated as ...

((new value) -(old value))/(old value) × 100%

This can be rearranged to ...

((new value)/(old value) -1) × 100%

Of course, the ratio (new value)/(old value) is the one in column P, so the formula for cell Q114 is simply ...

=P114-1

with the cell formatting is set to <em>show the value as a percent</em>.

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The cell phone costs that go in column O can make use of the ratio calculated in column P, or they can be formulated using the CPI directly. Either way, the previous year's cell phone cost is the current year's cost divided by the ratio in column P. That is, cell O113 could be either of ...

=O114/P114

=O114/N114*N113

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Of course, once you put these formulas in the cells at the bottom of the table, you must fill them upward so they calculate values for previous years. The attachment shows a recreation of a small part of your table, with the formula bar showing the formula in the highlighted cell.

3 0

2 years ago

What two numbers can add to 4 but multiple to -12

olasank [31]

Answer:

<em>Numbers: 6 and -2</em>

Step-by-step explanation:

<u>Equations</u>

This question can be solved by inspection. It's just a matter of factoring 12 into two factors that sum 4. Both numbers must be of different signs and they are 6 and -2. Their sum is indeed 6-2=4 and their product is 6*(-2)=-12.

However, we'll solve it by the use of equations. Let's call x and y to the numbers. They must comply:

$x+y=4\qquad\qquad [1]$

$x.y=-12\qquad\qquad [2]$

Solving [1] for y:

$y=4-x$

Substituting in [2]

$x(4-x)=-12$

Operating:

$4x-x^2=-12$

Rearranging:

$x^2-4x-12=0$

Solving with the quadratic formula:

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

With a=1, b=-4, c=-12:

$\displaystyle x=\frac{-(-4)\pm \sqrt{(-4)^2-4(1)(-12)}}{2(1)}$

$\displaystyle x=\frac{4\pm \sqrt{16+48}}{2}$

$\displaystyle x=\frac{4\pm 8}{2}$

The solutions are:

$\displaystyle x=\frac{4+ 8}{2}=6$

$\displaystyle x=\frac{4- 8}{2}=-2$

This confirms the preliminary results.

Numbers: 6 and -2

7 0

3 years ago

4 + {−5 + [−3 + 4 + 2(−7 + 4) + 4] + 2}

scoray [572]

Answer

it is 5 : )

Step-by-step explanation:

8 0

2 years ago

A puppy will grow 28 in it is currently 1 foot tall

ki77a [65]

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♥Hope this helps♥

4 0

3 years ago

Read 2 more answers

5. 3x + 5y + 5z =1<br> x - 2y = 5<br> 2x + 4y = 11

lilavasa [31]

Answer:

see explanation

Step-by-step explanation:

Given the 3 equations

3x + 5y + 5z = 1 → (1)

x - 2y = 5 → (2)

2x + 4y = 11 → (3)