All categories

3 years ago

PLZZZ HELP ASAP!!!!!!!

Mathematics

1 answer:

patriot [66]3 years ago

4 0

Answer:

2. y = x + 16; 0.21y = 0.27x + 2.88

Step-by-step explanation:

You have two conditions:

Volume of 18 % + volume of 27 % = volume of 21 %
Mass of acid in 18 % + mass of acid in 27% = mass of acid in 21 %

For the first condition,

16 + x = y Transpose

(1) y = x + 16

=====

For the second condition

V₁c₁ + V₂c₂ = V₃c₃

16×0.18 + 0.27x = 0.21y

2.88 + 0.27x = 0.21y Transpose

(2) 0.21y = 0.27x + 2.88

The system of equations is y = x + 16; 0.21y = 0.27x + 2.88

You might be interested in

What are the roots of y=x^2 +25

Lena [83]

Answer:

Its a i just took the test

Step-by-step explanation:

4 0

3 years ago

If $396 is invested at an interest rate of 13% per year and is compound continuously, how much will the investment be worth in 3

Sveta_85 [38]

Answer:

The investment at the end of the period will be $584.89.

Step-by-step explanation:

FV = PV e⁽ⁿˣ⁾

FV = Future Value = ?

PV = Present Value = $396

n = Interest Rate = 13%

x = time in years = 3

e = mathematical constant = 2.7183

FV = 396 x 2.7183⁽⁰°¹³ ˣ ³⁾

FV = 396 x 1.4770

FV = $584.89

7 0

3 years ago

PLEASE HELP ASAP WILL MARK BRAINLIEST!!

Papessa [141]

Answer:

Prime.

Step-by-step explanation:

$x^2-7x+8\\$

First let's multiply our outer coefficients in this case 1 and 8, so we have 1x8=8. Now the point of this is to get the factors of 8 and see if we can get that middle term -7. Factors of 8 are 1x8, 2x4 and that's it. From there I notice that -8+1 = -7 and so:

$x^2-7x+8 = x^2-8x+x+8 = x(x-8)+(x+8)$

Notice that the (x-8) and (x+8) are not the same factors, therefore the factors are not any of those answer choices and so it's prime. You can calculate the factors by using the quadratic formula, however I think that is beyond the scope of this question.

7 0

3 years ago

A machine is used to fill bags with sand. the average weight of a bag filled with sand is 22.3 pounds. Write an absolute value f

frutty [35]

Answer:

$y=f(x)=|x-22.3|$

Step-by-step explanation:

Let the weight of the bag of sand with an unknown weight be given as "x" pounds. Then, the difference between the weight of an average bag of sand which is given to be as 22.3 pounds, is given as $x-22.3$ . Therefore, the absolute value function describing the difference between the weight of an average bag of sand and a bag of sand with an unknown weight will be given as: $|x-22.3|$ .

Let us represent this by f(x) or y. And thus, we get:

$y=f(x)=|x-22.3|$

5 0

3 years ago

A tank is 5 metre long 3 metre wide and 1 m high. how many litre of water can it hold?<br><br>

Ratling [72]

Answer:

15,000 liters

Step-by-step explanation:

First, find the volume in meters. 5*3*1=15 meters

1 meter = 1000 liters

(x15)

15 meters = 15000 liters

Hope this helped :D

4 0

2 years ago