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3 years ago

Which expression is equivalent to 6423?

Mathematics

1 answer:

Ronch [10]3 years ago

5 0

Please show all of the expressions.

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Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. He checks his storage cabinet, but he only has a 5-lite

Delvig [45]

Answer:

0.75 liters of 5% hydrochloric acid solution
0.25 liters of 45% hydrochloric acid solution.

Step-by-step explanation:

Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.

As Rajan need total of 1 liter of solution, so

$x+y=1$

i.e $x=1-y$ --------------------1

As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so

$0.05x+0.45y=1\times 0.15$

i.e $5x+45y=15$ -------------2

Putting value of x from equation 1 in equation 2,

$\Rightarrow 5(1-y)+45y=15$

$\Rightarrow 5-5y+45y=15$

$\Rightarrow 5+40y=15$

$\Rightarrow 40y=15-5=10$

$\Rightarrow y=0.25$

Putting the value of y in equation 1,

$x=1-0.25=0.75$

Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.

4 0

3 years ago

Jaleel wrote a book. He wants to print some copies for

kotykmax [81]

Yes. there is a fixed cost and variable cost.

8 0

3 years ago

What digit(s) can be in the one's place of a number that has 5 as a factor?

max2010maxim [7]

Any number that ends with a 0 or a 5 would be a multiple of 5 because as you multipy numbers by 5 you start to see a pattern in the ones place of 5,0,5,0,5,0,5,0,... And so on forever

6 0

3 years ago

Read 2 more answers

Find the range of f in given ordered pair f(X)=8x-9,D={4,5,6}. plz. help fasttt plspls

Phantasy [73]

Answer:

f(2) = -2 + 12 = 10 so the ordered pair is (-2, 10).

6 0

3 years ago

Find the GCF of 56 and 46.

Novosadov [1.4K]

The gcd(56, 46) = 2 !!!!