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Vinil7 [7]
3 years ago
10

If Marie were to paint her living room alone, it would take 7 hours. Her sister Barbara could do the job in 8 hours. How many ho

urs would it take them working together? Express your answer as a fraction reduced to lowest terms, if needed.
Mathematics
1 answer:
Zielflug [23.3K]3 years ago
4 0

Answer:

\sf\longmapsto \:  3.73 hours

Step-by-step explanation:

\sf\longmapsto \:  \frac{1}{7 } +  \frac{1}{8}

\sf\longmapsto \:  \frac{15}{56}

Now, Reciprocal–

\sf\longmapsto \:  \frac{56}{15}

\sf\longmapsto \:  3.73 hours

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What is a relation and what makes it different from a function? How can you determine the domain and range of a function?
Misha Larkins [42]

Answer:

Note that both relations and functions have domains and ranges. The domain is the set of all first elements of ordered pairs (x-coordinates). The range is the set of all second elements of ordered pairs (y-coordinates). Only the elements "used" by the relation or function constitute the range.

6 0
3 years ago
WILL MARK BRAINLIEST!!!Triangle RST has vertices located at R (2,3), S (4,4), and T (5,0)
shtirl [24]

Answer:

Answers:

k = 13The smallest zero or root is x = -10

===============================

Work Shown:

note: you can write "x^2" to mean "x squared"

f(x) = x^2+3x-10

f(x+5) = (x+5)^2+3(x+5)-10 ... replace every x with x+5

f(x+5) = (x^2+10x+25)+3(x+5)-10

f(x+5) = x^2+10x+25+3x+15-10

f(x+5) = x^2+13x+30

Compare this with x^2+kx+30 and we see that k = 13

Factor and solve the equation below

x^2+13x+30 = 0

(x+10)(x+3) = 0

x+10 = 0 or x+3 = 0

x = -10 or x = -3

The smallest zero is x = -10 as its the left-most value on a number line.

Step-by-step explanation:

If this is wrong i am so sorry i tried my best.

5 0
4 years ago
If you want to create a pad>let and share it with me, answer this and put the link or code in the comments or your answer.
PIT_PIT [208]

Answer:

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Step-by-step explanation:

5 0
3 years ago
A soccer team is having a car wash. The team spent $65 on supplies. They earned $335, including tips. How much was the the team'
cestrela7 [59]

Answer:

Answer: $210 profit

Step-by-step explanation:

275-65 =210

6 0
3 years ago
Read 2 more answers
The question that says " a school has 1200 pupils "
Sonja [21]
How many girls like sports?  well, what's 2/5 of 1200? well, is just their product, 2/5 * 1200.

how many boys like sports?  well, what's 3/5 of 1200? 3/5 * 1200.

\bf \cfrac{2}{5}\cdot 1200\implies \cfrac{2\cdot 1200}{5}\implies \cfrac{2400}{5}\implies \stackrel{girls}{480}
\\\\\\
\cfrac{3}{5}\cdot 1200\implies \cfrac{3\cdot 1200}{5}\implies \cfrac{3600}{5}\implies \stackrel{boys}{720}
\\\\\\
\textit{how many }\stackrel{students}{pupils}\textit{ like sports?}\qquad 480 + 720
8 0
3 years ago
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