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kenny6666 [7]
3 years ago
6

What is 2(7-x)=6(1+2x)

Mathematics
2 answers:
Greeley [361]3 years ago
7 0
2(7-x)=6(1+2x) \\ \\ 14-2x=6+12x \\ \\ 14-6=12x+2x \\ \\ 8=14x \\ \\ x\approx0.57 \\\\\huge\text{The answer is 0.57}
Blababa [14]3 years ago
5 0
14-2x=6+12x
14=6+10x
8=10x
0.8=x
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well, the subtotal or pre-tax bill is $23.50, now let's add the 8% tax and

\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{8\% of 23.50}}{\left( \cfrac{8}{100} \right)23.50}\implies 1.88

so the post-tax bill is 23.50 + 1.88 = 25.38, and Jackie's tip is 20% of that

\begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{20\% of 25.38}}{\left( \cfrac{20}{100} \right)25.38}\implies 5.076\qquad \approx 5.08

6 0
1 year ago
Larry is 10 years old and his sister is 7 years old. In how many years time will there total age be 25 years?
maks197457 [2]
In the next 25 years, Larry will be 35 years old, while his sister will be 3 years less than him which is 32 years old for his sister, since his sister is 3 years younger.
7 0
3 years ago
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The product of two consecutive positive integers is 18 more than eight times the smaller number. Find the two numbers.
olga2289 [7]

Let , smallest integer is x.

So , other one is x + 1.

By , given conditions :

x( x + 1 ) = 8x + 18\\\\x^2+x=8x+18\\\\x^2-7x-18=0\\\\x^2-9x+2x-18=0\\\\x(x-9)+2(x-9)=0\\\\x=-2 \  ,\ x = 9

Since, the numbers are positive so, x = -2 is ignored.

Therefore, the numbers are 9 and 10.

Hence, this is the required solution.

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jenyasd209 [6]
16-A 18-B 19-D (not 100% sure on 16)
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3 years ago
PLEASE HELP ILL BRAINLIEST YOU PLEASE
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17²-8²=225

√225= 15

therefore both x and y are 15 ft

8 0
2 years ago
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