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sweet-ann [11.9K]
2 years ago
10

Please explain thoroughly so I understand. Will mark genuine answer as brainliest.

Mathematics
1 answer:
ololo11 [35]2 years ago
3 0

Answer:

B

Step-by-step explanation:

Easiest way is to use process of elimination by plugging in x numbers from the table in the equation to find the y and see which one matches.

Plug in 10 for x and y should be -1

Check A:

y= 2/3(10)-8\\y=-1.33

Not A, doesn't equal -1

Check B:

y = 3/2(10)-16\\y=15-16\\y=-1

Correct, might be B

Check another point (20,14):

y=3/2(20) - 16\\y=30-16\\y=14

Correct, it is B.

You can check other 2 and see that they are wrong.

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Find the area enclosed by the figure. Answer exactly or round to at least 2 decimal places.
notka56 [123]

Answer:

254.47

Step-by-step explanation:

4 0
3 years ago
If y varies directly as x, and y is 12 when x is 1.2, what is the constant of variation for this relation? A) 1 B) 10 C) 10.8 D)
Anit [1.1K]
\bf \begin{array}{cccccclllll}&\\
\textit{something}&&\textit{varies directly to}&&\textit{something else}\\ \quad \\&\\
\textit{something}&=&{{ \textit{some value}}}&\cdot &\textit{something else}\\ \quad \\&\\
y&=&{{ k}}&\cdot&x&\\
&\\
&&  y={{ k }}x&\\
\end{array}& \\\\\\
\textit{we know that }
\begin{cases}
y=12\\
x=1.2
\end{cases}\implies y=kx\implies 12=k\cdot 1.2

solve for "k" to find "k", or the "constant of variation"
6 0
3 years ago
Read 2 more answers
Please help will give brainliest and 30 pts
Rus_ich [418]
You’re not giving 30 points, you’re only giving 5
3 0
3 years ago
Solve the equation below:<br><br> ln x- ln 5= -1
Anastaziya [24]

Answer:

x = 5/e

Step-by-step explanation:

ln x- ln 5= -1

We know that ln a - ln b = ln (a/b)

ln x- ln 5= -1

ln(x/5) = -1

Raise each side to the power of e

e^ ln(x/5) = e^-1

We know that e^-1 = 1/e

x/5 = 1/e

Multiply each side by 5

x/5 *5 = 1/e * 5

x = 5/e

4 0
3 years ago
Brian rides his bike 0.27 of a mile per minute. If it takes him 27 minutes to ride his bike to his friend's house, how far away
V125BC [204]

Answer:

His friend lives 7.29 miles away

Step-by-step explanation:

All you have to do is times 0.27 by 27 and you get 7.29

4 0
3 years ago
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