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Marina CMI [18]
3 years ago
6

Please show your work What is the solution of the equation

x" id="TexFormula1" title=" \sqrt{2x+13} -5=x" alt=" \sqrt{2x+13} -5=x" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Hatshy [7]3 years ago
3 0
Add the five to each side.
then square it to get rid of the square root
2x+13=(5+x)^2
2x+13=x^2+10x+25
2x=x^2+10x+12
x^2+8x+12=0
(x+6)(x+2)
x+6=0
x+2=0
answers are -2 and -6, however, when pluging -6 in it doesnt work, so it is only -2.
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(x+5) (×+5)=49. I need to know what x is, how do I solve this?
Archy [21]
(x+5)^2=49
squaer root both sides
x+5=+/-7
minus 5 both sides
x=-5+/-7
x=-5+7=2
x=-5-7=-12


x=2 or -12

4 0
3 years ago
12% of 80 working out​
horsena [70]

How to do the problem:
Assuming that you mean you want 12% of the number 80 and showing work, here is the answer:

To get X percent of any number, write the percent as a decimal and then multiply that decimal by the whole.

What I mean:

You want 12% of 80
so first change 12% into a decimal
12% is equal to .12 as a decimal

Then multiply that decimal by the whole
Since you want 12%  of 80, 80 is the whole

that means you do .12 * 80
which is equal to 9.6
<u>Thus(answer)</u>
12% of 80 = 9.6

4 0
3 years ago
Tom deposited $2410 in a bank that pays 12% interest, compounded monthly. Find the amount he will have at the end of 3 years.
OLEGan [10]

Answer:

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Interest Rate: 12% (yearly)

Effective Annual Rate: 12.68%

Calculation period: 3 years

$3,448.15

Step-by-step explanation:

The generic formula used in this compound interest calculator is

V = P(1+r/n)^(nt)

V = the future value of the investment

P = the principal investment amount

r = the annual interest rate

n = the number of times that interest is compounded per year

t = the number of years the money is invested for

4 0
3 years ago
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Answer:

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Step-by-step explanation:

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7 0
3 years ago
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2+2=<br>I need to know the answer ​
aniked [119]

Answer:

2+2=4

Step-by-step explanation:

if you put up 2 fingers and then add 2 more (2+2) you will get 4!

lol I hope that helped!

4 0
3 years ago
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