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3 years ago

Only question for this page, Can anyone help me? This is Equivalent ratios Btw. Thanks! :)

Mathematics

2 answers:

Anna71 [15]3 years ago

5 0

Answer:

I do believe it would be 7 : 14

Step-by-step explanation:

1 : 2 is sort of like 1/2 in fractions, just think of it that way.

So if it's 1/2 then all you do is find what equals 14 when dividing by 2. (1 : 2 = 1/2 = ?/14 = 14/2

Then you would get the numerator for ?/14 which would be 7.

Now put it back into ratio form.

Therefore you now have 7 : 14

vladimir2022 [97]3 years ago

4 0

Basically it’s the you know times tables it’s basically up then that so it would be 7:14 because 1:2 is half if you get what i mean

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4 years ago

Read 2 more answers

A pharmacist has an 18% alcohol solution and a 40% alcohol solution. How much of each should he mix together to make 10 liters o

ladessa [460]

X = amount of the 18% solution

y = amount of the 40% solution

we know the 18% solution has only 18% of alcohol, the rest is maybe water or something, now, how many liters is 18%? well, 18% of anything is just (18/100) * anything, so, 18% of x is just (18/100) *x or 0.18x, and that's how many liters are there.

likewise, how many liters are there in the 40% solution? well, (40/100) * y, or 0.4y, that many.

we know the mixture has to yield 10 liters at 20% alcohol, how many liters of only alcohol is that? well, (20/100) * 10, or 2 liters.

$\bf \begin{array}{lccclll}
&\stackrel{liters}{amount}&\stackrel{alcohol~\%}{quantity}&\stackrel{liters}{alcohol}\\
&------&------&------\\
\textit{18\% solution}&x&0.18&0.18x\\
\textit{40\% solution}&y&0.40&0.4y\\
------&------&------&------\\
mixture&10&0.20&2
\end{array}$

$\bf \begin{cases}
x+y=10\implies \boxed{y}=10-x\\
0.18x+0.4y=2\\
----------\\
0.18x+0.4\left( \boxed{10-x} \right)=2
\end{cases}
\\\\\\
0.18x-0.4x+4=2\implies -0.22x=-2
\\\\\\
x=\cfrac{-2}{-0.22}\implies x=\cfrac{100}{11}\implies x=9\frac{1}{11}$

how much of the 40% solution? well y = 10 - x

3 0

4 years ago

Sarah hiked a path that took her from 34 feet below sea level to 52 feet above sea level . What was the change in her elevation?

Ugo [173]

Answer:

86 ft

Step-by-step explanation:

First method: Logical thinking

Think of the position 34 ft below sea level as -34.

The position above sea level is 52.

You need to find the distance between -34 and 52.

You go from 34 ft below sea level, -34 to 0. That is 34 ft.

Then you go from sea level, 0 ft, to 52 ft above sea level. That is 52 ft.

The total is 34 ft + 52 ft = 86 ft

Answer: 86 ft

Second method: Calculate a distance in math

The distance between two points on a number line is the absolute value of the difference of their coordinates. The coordinates are -34 and 52. Subtract the numbers in either order, and take the absolute value of the difference.

|-34 - 52| = |-86| = 86

If you did it in the other order, you'd get the same answer.

|52 - (-34)| = |52 + 34| = |86| = 86

Answer: 86 ft

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3 years ago

Help. I need to factor and solve using the quadratic formula -x^2+2x=7

aleksandrvk [35]

Answer:

Irreducible factorization

Step-by-step explanation:

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3 years ago

Only question for this page, Can anyone help me? This is Equivalent ratios Btw. Thanks! :)​

Only question for this page, Can anyone help me? This is Equivalent ratios Btw. Thanks! :)