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Leni [432]
3 years ago
12

1. If the variables x and y are proportional and y = 4 when x = 20 then which of the following equations relates all values of x

and y? (1) y = x+16 (3) y = 5x (2)y=-* (4) y=x-16​
Mathematics
2 answers:
Mkey [24]3 years ago
7 0

Answer:

4.) y=x-16

Step-by-step explanation:

Here,

y=4,

x=20

Now,

putting the value of x and y.

or, 4=20-16

or, 4+16=20

∴20=20

erik [133]3 years ago
3 0
That’s easy frrrrrdddssfgfssfffder
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Answer:

Hi thats the answer.

Step-by-step explanation:

5 0
2 years ago
Geometry ! No links please
DENIUS [597]

The Answer Is CD=5

AB/BC=2

2=BE/CD

2/1=10/X

2/1=10/5

2=2

6 0
3 years ago
You have 10 cups of a cleaning solution that is 10% white vinegar and 90% water. You want the mixture to be 50% white vinegar an
vichka [17]
Whatever% of anything is just (whatever/100) * anything.

let's say we'll add "x" cups of pure vinegar, pure vinegar meaning is 100% vinegar.

how much vinegar is there in "x" cups of 100% vinegar?  well (100/100) * x, or just "x".

how much vinegar is there in 10 cups of 10% vinegar?  well, (10/100) * 10, or just 1.

say after adding the "x" cups to the 10 cups, we end up with "y" cups, of 50% of vinegar.

how much is 50% of y?  well, (50/100) * y or 0.5y.

bearing in mind that x+10 = y, both cups amounts added up, and that x+1=0.5y, both vinegar amounts added up, thus 

\bf \begin{array}{lccclll}
&\stackrel{cups}{amount}&\stackrel{vinegar~\%}{amount}&\stackrel{vinegar~cups}{quantity}\\
\textit{100\% vinegar}&x&1.00&x\\
\textit{10\% cups}&10&0.10&1\\
------&------&------&------\\
mixture&y&0.5&0.5y
\end{array}
\\\\\\
\begin{cases}
x+10=\boxed{y}\\
x+1=0.5y\\
----------\\
x+1=0.5\left( \boxed{x+10} \right)
\end{cases}
\\\\\\
x+1=0.5x+5\implies 0.5x=4\implies x=\cfrac{4}{0.5}\implies x=8
4 0
3 years ago
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spin [16.1K]

Answer:

25 feet per second.

Step-by-step explanation:

Divide 75ft by 3se = 25ft per second.

6 0
3 years ago
Read 2 more answers
If cos θ > 0 and tan θ > 0, which of the following statements MUST be true? (5 points)
solniwko [45]

Yo sup??

cosx>0 in the 1st and 4th quadrant.

tanx>0 in the 1st and 3rd quadrant.

therefore the common solution is x lies in 1st quadrant.

Hence the correct answer is option A.

Hope this helps

5 0
3 years ago
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