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In-s [12.5K]
3 years ago
10

21. A plumber charges a flat fee plus a cost per hour. Customer 1 is charged $114

Mathematics
2 answers:
gulaghasi [49]3 years ago
5 0

Answer:

B. $254

Step-by-step explanation:

Flat Fee: $30    

Cost per hour: $28

Customer 1: 3(28) + 30 = 114

Customer 2: 5(28) + 30 = 170

Customer 3: 8(28) + 30 = 254

sukhopar [10]3 years ago
4 0
C 284. Nnnnnnnnnn I need to but 25 letters so. Wkjejsjejwnwns
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One morning, John drive 5 hours before stopping to eat. After lunch, he. increased his speed by 10 mph. If he completed a 500-mi
Marrrta [24]
So  he drove 5hrs, before lunch, now, he was going at speed, say "r", after he ate, he sped up by 10mph, so, his rate is whatever "r" is, plus 10, or " r + 10 ", after lunch

we know the whole trip took 10hrs, so, is 5hrs before lunch and 5hrs after lunch

we also know the whole trip was 500miles, so if he drove, say "d" miles before lunch, after lunch he drove the slack after lunch, or " 200 - d "

recall, your d = rt, distance = rate * time

\bf \begin{array}{lccclll}
&distance&rate&time\\
&-----&-----&-----\\
\textit{before lunch}&d&r&5\\
\textit{after lunch}&500-d&r+10&5
\end{array}
\\\\\\

\begin{cases}
\boxed{d}=5r\\
500-d=(r+10)5\\
----------\\
500-\boxed{5r}=(r+10)5
\end{cases}
\\\\\\
\cfrac{500-5r}{5}=r+10\implies 100-r=r+10

and I'm sure you know what that is
6 0
2 years ago
Males and females (ages 13–18) were surveyed to choose a favorite free-time activity: playing computer games, listening to music
liq [111]
 Gender  |  Games| Music | Movies/TV |
Female   |   4         | 20      |   16
Male       | 15         | 12      |   13
Total       | 19         |  32     |   29


Something like that :)
8 0
3 years ago
Read 2 more answers
Find the equation of a line passing through the given point and perpendicular to the given equation (-5,-2) and y=-2x+2
liq [111]

Answer:

y=1/2x+ 1/2


Step-by-step explanation:


5 0
3 years ago
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Write this statement in your own words: ∃x ∈ ℕ, y ∈ ℤ|x² = y² Rewrite this using the appropriate mathematical notation: Even num
Serga [27]

Answer:

See below.

Step-by-step explanation:

1)

So we have:

\exists x\in\mathbb{N},y\in\mathbb{Z}|x^2=y^2

This can be interpreted as:

"There exists a natural number <em>x</em> and an integer <em>y</em> such that x² is equal to y²."

2)

So we want even numbers are in the set of integers.

\{2n:n\in\mathbb{Z}\}\in\mathbb{Z}

This is interpreted as:

"The set of even numbers (2n such that n is an integer) is in the set of integers"

6 0
3 years ago
Just answer the question i'll mark you the brainlest.
Fiesta28 [93]

Answer:

- \frac{8}{11}

Step-by-step explanation:

\frac{(5-3)^2}{1+3^2-21} ← evaluate numerator and denominator

= \frac{2^3}{1+9-21}

= \frac{8}{-11}

= - \frac{8}{11}

8 0
3 years ago
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