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-Dominant- [34]
2 years ago
14

-25 - 6k + 7=6(1+ 3k) Solve the equation for The Variable

Mathematics
2 answers:
dmitriy555 [2]2 years ago
6 0

Answer: Isolate the variable by dividing each side by factors that don't contain the variable.

k = −1

romanna [79]2 years ago
6 0

Answer:

-1

Step-by-step explanation:

-25+7 -6=6k+18k

-24=24k

k=-1

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I need answers please​
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4 0
3 years ago
A small farm field is a square measuring 320 ft on a side. What is the perimeter of the field? If you double the length of each
Marina CMI [18]

Answer:

old per: 1280

new per:2560

Step-by-step explanation:

first perimeter u get it by adding all the sides and since its a square  then all the sides are equal so u can just do

320*4 which is equal to 1280

and by doubling the sides u can just double it in the old equation meaning

(320*2)*4

which is equal to 2560

6 0
3 years ago
Read 2 more answers
Can someone explain this to me pls
Maurinko [17]

Answer: 15 gallons are needed

Step-by-step explanation: Simplify the ratio 5:2, which is 2.5:1. Multiply 6 on both sides to get 15:6. :)

7 0
2 years ago
How much pure acid should be mixed with 6 gallons of a 20% acid solution in order to get a 90% acid solution?
beks73 [17]
So, how much acid is there in 6 gallons?  well is 20% acid or (20/100), so the amount of acid in it just (20/100) * 6 or 1.2, the rest is say water.

now, if we want a 90% solution, and say we add "y" gallons, how much acid is in it?  well (90/100) * y, or 0.9y.

now let's add "x" gallons of pure acid, now, pure acid is just pure acid, so is 100% acid, how much acid is there in it?  (100/100) * x, or 1x or just x.

we know whatever "x" and "y" amounts are, they -> x + 6 = y

and we also know that x + 1.2 = 0.9y

\bf \begin{array}{lccclll}
&\stackrel{gallons}{acid}&\stackrel{acid~\%}{quantity}&\stackrel{acid~gallons}{quantity}\\
&------&------&------\\
\textit{pure acid}&x&1.00&x\\
\textit{20\% sol'n}&6&0.20&1.2\\
------&------&------&------\\\
mixture&y&0.90&0.9y
\end{array}
\\\\\\
\begin{cases}
x+6=\boxed{y}\\
x+1.2=0.9y\\
----------\\
x+1.2=0.9\left( \boxed{x+6} \right)
\end{cases}
\\\\\\
x+1.2=0.9x+5.4\implies x-0.9x=5.4-1.2\implies 0.1x=4.2
\\\\\\
x=\cfrac{4.2}{0.1}\implies x=\stackrel{gallons}{42}
3 0
3 years ago
Suppose to travel 162 miles in 3 hours .use the formula d=st to find the average speed
Umnica [9.8K]

Distance = Speed x time = 162 x 3 = 486 miles/hour



Answer: 486 miles/hour

6 0
2 years ago
Read 2 more answers
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