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3 years ago

14

The sum of two times a number and 7 is five times the difference of a number and six. Solve for the variable then Round your ans

wer to the nearest hundredths.

1 answer:

Vanyuwa [196]3 years ago

7 0

Answer:

12.33

Step-by-step explanation:

let 'n' = a number

2n + 7 = 5(n - 6)

2n + 7 = 5n - 30

-3n = -37

n = 37/3 or 12.33

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Please help! I need to tell whether x and y are in a proportional relationship and I need to write an equation that represents t

STALIN [3.7K]

Answer:

vfaafdavas

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3 years ago

PLEASE HELP! The table shows values for functions f(x) and g(x) .(Table in picture)

larisa [96]

Answer:

x = -1
x = 1

Step-by-step explanation:

Find the rows in the table where f(x) shows the same value as g(x). Those rows are ...

x = -1, f(x) = 1, g(x) = 1

x = 1, f(x) = -7, g(x) = -7

The values of x are what is of interest. They are -1 and 1.

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3 years ago

I need help with number 4

Nadusha1986 [10]

$\bf \begin{cases}
\quad3x+2y=-9\\
-10x+5y=-5
\end{cases}$

so hmm the idea behind the elimination, is to make the value atop or below, of either variable, the same but with a negative sign

so hmmm say... we'll eliminate "y"

so... let's see, we have 2y and 5y, both positive
what do we multiply 2y to get a negative -5y, that way, -5y +5y = 0 and poof it goes

well let's see, let's try "k" $\bf 2yk=-5y\implies k=-\cfrac{5y}{2y}\implies k=-\cfrac{5}{2}$

so.. if we multiply 2y by -5/2, we'll end up with -5y

well, let's multiply that first equation then by -5/2

$\bf \begin{array}{rllll}
3x+2y=-9&\qquad\times -\frac{5}{2}\implies &-\frac{15}{2}x-5y=\frac{45}{2}\\\\
-10x+5y=-5&\implies &-10x+5y=-5\\
&&---------\\
&&\frac{-35}{2}x+0\quad=\frac{35}{2}
\end{array}\\\\
-----------------------------\\\\
\cfrac{-35}{2}x=\cfrac{-35}{2}\implies \cfrac{-35x}{2}=\cfrac{-35}{2}\implies x=\cfrac{2}{-35}\cdot \cfrac{-35}{2}
\\\\\\
\boxed{x=1}$

so.. now we know x = 1.... so let's plug that in say hmmm 2nd equation

$\bf -10(1)+5y=-5\implies -10+5y=-5\implies 5y=5\implies\boxed{ y=1}$

3 0

4 years ago

Kayla filled a bucket with 4 gallons of Water , she dumped exactly 1.o34 gallons . How much water is left in the buckets ?

yKpoI14uk [10]

4 - 1.034 = 2.966
There would be 2.966 gallons of water left in the bucket.

I hope this helps!

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4 years ago

What is the area of parallelogram ABCD?

boyakko [2]

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3 years ago