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2 years ago

I need help with this

Mathematics

2 answers:

hodyreva [135]2 years ago

8 0

Answer:

Step-by-step explanation:

Veseljchak [2.6K]2 years ago

4 0

You need to substitute where the x and y are at

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Suppose y varies directly with x. if y=-3 when x=5 find y when x=-1

Scrat [10]

$\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}
\\ \quad \\
\textit{we know that, when}
\begin{cases}
y=-3\\
x=5
\end{cases}\implies y=kx\implies (-3)=k(5)$

solve for "k", to find the "constant of variation",
then plug it back in the y = kx, to get the equation
now
what's is y when x = -1?
well, just plug that in the equation with the found "k" value,
to get "y" :)

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3 years ago

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Justin is training for a hamburger eating competition. He is eventually able to eat 15 hamburgers in 10 minutes.

cluponka [151]

Importance must always be given to all the information's that are already given in the question. Based on those information's the answer to the question can be easily deduced.
Number of Hamburgers eaten by Justin in 10 minutes = 15
Then
The number of hamburgers eaten by Justin in 1 minute = 15/10
= 1.5
So option "B" is the correct option among all the options given in the question. It can seen from the deduction that Justin can eat 1.5 hamburgers in 1 minute. I hope the procedure is clear enough for you to understand.

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3 years ago

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Find the consecutive odd numbers such that 6 times the smaller plus 3 times the larger comes to 105

Amanda [17]

Answer:

11 and 13

Step-by-step explanation:

let smaller odd number be x

larger odd nuber be x+2

according to the question algebraic expression can be written as

6x+3(x+2)=105

6x+3x+6=105

9x=105-6

9x=99

x=99/9

x=11

larger number=x+2

11+2

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Nadusha1986 [10]

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