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Tresset [83]
2 years ago
6

Painter A charges $70 to start a job and $80 per hour he/she is there. Painter B charges $100 per hour. Write an inequality that

would determine how many hours would the job take for Painter A to be less expensive and solve.
Mathematics
1 answer:
Debora [2.8K]2 years ago
8 0

Let the number of hours be x.

70 + 80x < 100x

20x > 70

x > 3.5

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What is x equal to in the equation 10+x=5(1/5x+2)
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Answer:

30

Step-by-step explanation:

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6 0
3 years ago
In a country that only wants girls, every family continues to have children until they have a girl. If they have a boy, they hav
Alik [6]

Complete Question

In a country in which people only want Girls, every family continues to have children until they have a Girl. If they have Girl, they stop. If they have boy, they will continuous have child. Assuming that the birthrate of Girl is 52%, what is the proportion of Girl in the country?

Answer:

0.52

Step-by-step explanation:

From the question we are told that

52% is the birthrate of Girls

Therefore

       \frac{52}{100} =0.52

0.52 is the proportion of Girls to boys in that country

7 0
2 years ago
Find an equation for the line<br> perpendicular to y=7x-9 that passes<br> through the point (7,2).
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Answer:

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6 0
2 years ago
Let \[f(x) = \frac{3x - 7}{x + 1}.\]find the range of $f$. give your answer as an interval.
ra1l [238]
Hello :
let : y=  \frac{3x-7}{x+1}
calculate : x ......x <span>≠ -1 
</span>y(x+1) = 3x-7
yx+y =3x-7
yx-3x = -y-7
x(y-3) = -7-y
x =  \frac{y+7}{3-y}
the inverse function is : g(x) =  \frac{x+7}{3-x}
domain of : g  is the range of : f
as an interval : ]-∞: 3 <span>[</span>U ]3;+∞[

7 0
3 years ago
Which expressions are equivalent to when x0? Check all that apply.
Genrish500 [490]
We have that

\frac{(x+4)}{3} / \frac{6}{x} = \frac{x*(x+4)}{3*6} \\ \\ = \frac{( x^{2} +4x)}{18}

therefore

case a) 
\frac{(x+4)}{3} * \frac{x}{6}
Is equivalent

case b) 
\frac{6}{x} * \frac{(x+4)}{3}
Is not equivalent

case c) 
\frac{x}{6} * \frac{(x+4)}{3}
Is  equivalent

case d) 
\frac{(2 x^{2} +4x)}{6}
Is not equivalent

case e) 
\frac{(2 x^{2} +4x)}{18}
Is equivalent

Hence

the answer is

\frac{(x+4)}{3} * \frac{x}{6}

\frac{x}{6} * \frac{(x+4)}{3}

\frac{(2 x^{2} +4x)}{18}
3 0
2 years ago
Read 2 more answers
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