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pav-90 [236]
3 years ago
9

The bill for jacobs breakfast at a Nashville restaurant is 9$ he wants to leave a 20% tip how much should the tip be

Mathematics
1 answer:
jenyasd209 [6]3 years ago
7 0

Answer:

the tip should be $1.8

Step-by-step explanation:

9÷100=0.09

0.09×20=1.8

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2.Solve the following quadratic equations<br> i. 9x^2 - 1/16<br> ii. 2h^2 - 3h - 27
Juli2301 [7.4K]
i)~9x^2-\dfrac{1}{16}=0\iff9x^2=\dfrac{1}{16}\iff x^2=\dfrac{1}{9\cdot16}\iff \\\\x^2=\dfrac{1}{144}\iff x=\pm\sqrt{\dfrac{1}{144}}=\pm\dfrac{1}{12}\Longrightarrow\boxed{x=\pm\dfrac{1}{12}}


ii)~2h^2-3h-27=0\\\\\Delta=b^2-4ac\to \Delta=(-3)^2-4\cdot2\cdot(-27)\to\Delta=9+216=225\\\\&#10;\Longrightarrow h=\dfrac{-b\pm\sqrt{\Delta}}{2a}=\dfrac{-(-3)\pm\sqrt{225}}{2\cdot2}=\dfrac{3\pm15}{4}\\\\\begin{cases}h_1=\dfrac{3+15}{4}=\dfrac{18}{4}\iff \boxed{h_1=\dfrac{9}{2}}\\h_2=\dfrac{3-15}{4}=\dfrac{-12}{4}\iff\boxed{h_2=-3}\end{cases}

4 0
3 years ago
All prime numbers are odd change to conditional statement
patriot [66]
Not all prime numbers are odd, 2 is not odd and it's a prime number
8 0
4 years ago
Read 2 more answers
2x<img src="https://tex.z-dn.net/?f=2x%5E2%2B3x-9" id="TexFormula1" title="2x^2+3x-9" alt="2x^2+3x-9" align="absmiddle" class="l
Juliette [100K]

the answer will equal about 3,053

3 0
3 years ago
The sum of the square of two consecutive whole number is 25. Find the numbers
Gnom [1K]
Don't you mean "the sum of the squares ..."?
The sum of the squares of two consecutive whole numbers is 25.  Find the numbers.  Let the first be represented by x and the second by x+1.
Then x^2+(x+1)^2=25.  Expanding, x^2+x^2+2x+1=25.
Rewriting this as a quadratic equation in standard form,

2x^2+2x+1=25, or 2x^2+2x-24=0.  Simplifying, x^2+x-12=0.
Factoring, (x-3)(x+4)=0.  Solving for x:  x-3=0, so x=3; x+4=0, so x=-4.
Choose the positive x value:  x=3.  Then the next consecutive number is 2+1=3+1=4.

Check:  Does 3^2 + 4^2 = 5^2 = 25?  Yes.
The numbers are 3 and 4.
3 0
3 years ago
What are these answers please help
Sphinxa [80]

Answer: if it is a positive number then it will always be a positive integer

Step-by-step explanation:

4 0
3 years ago
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