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2 years ago

Asap! plsss helo i’ll give brainliest

Mathematics

1 answer:

Aleks04 [339]2 years ago

7 0

Answer:

The answer is 5 N norths I think :)

Step-by-step explanation:

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A chemist wants to make 100 liters of a 44% acid solution. She has solutions that are 20% acid and 60% acid.

alexgriva [62]

the first solution is 20% acid, and say we'll be using "x" liters, so how many liters of just acid are in it? well 20% of "x" or namely 0.2x. Likewise for the 60% acid solution, if we had "y" liters of it, the amount of only acid in it is 0.6y.

$\begin{array}{lcccl} &\stackrel{solution}{quantity}&\stackrel{\textit{\% of }}{amount}&\stackrel{\textit{liters of }}{amount}\\ \cline{2-4}&\\ \textit{1st solution}&x&0.20&0.2x\\ \textit{2nd solution}&y&0.60&0.6y\\ \cline{2-4}&\\ mixture&100&0.44&44 \end{array}~\hfill \begin{cases} x+y=100\\\\ 0.2x+0.6y=44 \end{cases}$

$x+y=100\implies y=100-x~\hfill \stackrel{\textit{substituting on the 2nd equation}}{0.2x+0.6(100-x)=44} \\\\\\ 0.2x+60-0.6x=44\implies -0.4x+60=44\implies -0.4x=-16 \\\\\\ x=\cfrac{-16}{-0.4}\implies \boxed{x=40}~\hfill \boxed{\stackrel{100-40}{y=60}}$

7 0

1 year ago

15 x sin(30)=?/15 x 15

Delicious77 [7]

Answer:

The exact value of

sin

(

)

sin(30) is

12.

⋅

15⋅12

Combine

15 and

12.

152

The result can be shown in multiple forms.

Exact Form:

152

Decimal Form:

7.5

Mixed Number Form:

712

Step-by-step explanation:

8 0

2 years ago

G(t)=t squared - 2; Find g(9)

GaryK [48]

Answer:

Step-by-step explanation:

So we have the function:

$g(t)=t^2-2$

To find g(9), substitute 9 for t. Thus:

$g(9)=9^2-2$

Square:

$g(9)=81-2$

Subtract:

$g(9)=79$

So, our answer is 79.

And we're done!

4 0

2 years ago

There are 45 red tiles,25 blue tiles and 30 green tiles in a bag.

Mazyrski [523]

This is a question of probability.
Probability of picking any color= number of tiles with that color/total number of tiles
Total=45+25+30=100
P(red tile)=(45/100)x60=0.45x60=27
P(blue tile)=(25/100)x60=0.25x60=15
P(green tiles)=(30/100)x60=0.3x60=18

7 0

3 years ago

a store purchased a DVD for $12.00 and sold it to a customer for 50% more than the purchase price. the customer was a 7% tax whe

zepelin [54]

Answer : 19.26 ........ I know it

8 0

2 years ago

Read 2 more answers