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Mice21 [21]
3 years ago
7

How do I solve equations with a variable to the power of something (give steps please)

Mathematics
2 answers:
kodGreya [7K]3 years ago
6 0

Answer:

x = 0, -\frac{5}{2}

Step-by-step explanation:

First move all terms to one side of the equation to set them equal to 0

That is already done in your problem

The try to factor, if possible.  In your case, factor out x

x(2x + 5) = 0   Now, use the property that says if AB = 0, then A = 0 or B = 0 or both A and B equal 0

So, x = 0    or   2x + 5 = 0

                             2x = -5

                               x = -\frac{5}{2}

Always check your results in the original equation to see if they work

2(0^{2}  + 5(0) = 0 + 0 = 0\\

and 2(-\frac{5}{2} )^{2}  + 5(-\frac{5}{2} )\\ = 2(\frac{25}{4} ) -  \frac{25}{2}  \\ =  \frac{25}{2}  -  \frac{25}{2} = 0

Both results make the equation true, so x = 0, -\frac{5}{2}

lozanna [386]3 years ago
5 0

Answer:

Step-by-step explanation:

Factoring will reveal the solution. So we divide the equation by the greatest common factor of the terms and use that factor as the coefficient. In this case the greatest common factor is just x.

2x^2+5x

x(2x+5) so the equation will equal zero when either of those expressions is zero because zero times anything is zero. x=0 and x=-5/2

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Step-by-step explanation:

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3 years ago
Below is the graph of the equation y=|x+2|-1. Use this graph to find all values of x such that
amid [387]

Answer:

y>0,        -3>x> -1

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Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Heidi's Accessories bought 50 necklaces for $10 each on account. The invoice included a 6% sales tax and payment terms of 2/10,
garri49 [273]

Answer:

<u>The correct answer is B. Accounts payable for US$ 53.oo</u>

Step-by-step explanation:

1. Let's recall what is the Journal entry when a company return part of the inventory previously purchased:

Debit

The amount Heidi's accessories owed to the supplier would have been sitting as a credit on the accounts payable account because the invoice has not been payed. In the case of this return, we should debit it because we should diminish the amount due.

Credit

The goods Heidi's accessories are returning and therefore, the asset of inventory decreases. The credit to purchase returns reduces the value of the total purchases. That's why options C and D are incorrect.

2. Now, let's calculate the amount of the return that Heidi's accessories made, this way:

Return = Number of necklaces * Price of each necklace + Sales taxes

Replacing with the real values, we have:

Return = 5 * 10 + (5 * 10) * 0.06

Return = 50 + (50) * 0.06

Return = 50 + 3 = 53

<u>The correct answer is B. Accounts payable for US$ 53.oo</u>

7 0
3 years ago
The length of a rectangle is 4 cm longer than its width. If the perimeter of the rectangle is 44 cm, find its area.​
adell [148]
Length: w+4
Width:w
Perimeter:44
Area: L times w
P=44
44=2(w)+2(w+4)
44=2w+2w+8
44=4w+8
36=4w
w=9
L=w+4
L=9+4
L=13
Area should equal 117 cm squared
5 0
3 years ago
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