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evablogger [386]
3 years ago
8

A tourist's cab fare was $12.89. If she would like to give the driver a tip of 15%, approximately how Much money should she give

as a tip?
Mathematics
1 answer:
ozzi3 years ago
3 0
12.89 is our initial
to find 15% of 12.89 we multiply it by 0.15
12.89 * 0.15 = 1.9335
1.9335 is 15 % tip now we just need to add this on our initial.
12.89 + 1.9335 = 14.82 ( 14.8 )
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Suppose that n is a positive number and Log10 n = q. Which expression always equals the value of Log10 n^2?
Slav-nsk [51]

<u>2q</u>

Answer:

solution given:

log_{10} n=q

now

Log_{10 }n^2=?

by using property of logarithms

log_{a} n^p=p log_{a}n

now

Log_{10 }n^2=2 Log_{10 }n

=2q

since log_{10} n=q

Step-by-step explanation:

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3 years ago
5x minus 2y=14 what is this in slope intercept form
emmasim [6.3K]

Answer:

slope=1

Step-by-step explanation:

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6 0
3 years ago
X^2+9x+7=y standard to vertex form
KonstantinChe [14]

Answer:

y = (x + 4.5)² - 13.25

Step-by-step explanation:

y = x² + 9x + 7

We need to get a perfectly squared binomial as part of the right side.

Take the '9x' term, divide it in half, square it, add <u>and also subtract it </u>on the right side, as shown below. That would be (4.5)² = 20.25 added <u>and </u>subtracted.

y = x² + 9x        + 7

y = x² + 9x + 20.25       + 7 - 20.25

y = (x² + 9x + 20.25)  - 13.25

y = (x + 4.5)² - 13.25

y = (x + 4.5)² - 13.25

Vertex Form is y = a(x-h)² + k, where the parabola vertex is (h, k)

So if you wrote this as y = 1(x - [-4.5] )² + (-13.25), we would see that a = 1, and h = -4.5 and k = -13.25.

Vertex = (-4.5, -13.25)

I verified on a graphing calculator that this is indeed the vertex of the parabola.

3 0
3 years ago
For what value(s) of x is the fraction 5x-10/x^2-25 undefined?
Korvikt [17]

The fraction will be undefined on x=5 and x=-5

Step-by-step explanation:

The fraction is undefined on values that make the denominator of the fraction zero.

Given fraction is:

\frac{5x-10}{x^2-25}

To find the values on which the denominator will be zero, we put the denominator equal to zero.

x^2-25=0\\(x)^2-(5)^2=0\\(x+5)(x-5)=0\\x+5 = 0 => x=-5\\x-5 = 0 => x=5

So,

The fraction will be undefined on x=5 and x=-5

Keywords: Fractions

Learn more about fractions at:

  • brainly.com/question/2456596
  • brainly.com/question/2479097

#LearnwithBrainly

3 0
4 years ago
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