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mr Goodwill [35]
3 years ago
8

A 30% acid solution was mixed with a 10% acid solution. The result was 600g of a 15% solution. How much of each solution was use

d for the mixture?

Mathematics
1 answer:
AlexFokin [52]3 years ago
3 0
____________________________________

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Which function is shown in the graph?
muminat

Answer: The correct answer choice is B

Step-by-step explanation:

I graphed each function on the desmos calculator and answer choice B matched the graph.

6 0
3 years ago
NEED HELP..... Select the polynomial that is a perfect square trinomial. 36x^2 − 4x + 16 16x^2 − 8x + 36 25x^2 + 9x + 4 4x^2 + 2
Iteru [2.4K]
<h3>Answer: Choice D.  4x^2 + 20x + 25</h3>

===============================================

Explanation:

Perfect square trinomials are in the form (a+b)^2 = a^2+2ab+b^2

So the first and last terms must be perfect squares. The middle term is twice that of the square roots of each first and last term.

Choice D fits the description because 4x^2 = (2x)^2 is the first term, so a = 2x and 25 = 5^2 is the last term meaning b = 5. Note how 2ab = 2*2x*5 = 20x is the middle term.

-------------

(a+b)^2 = a^2+2ab+b^2

(2x+5)^2 = (2x)^2+2*2x*5+5^2

(2x+5)^2 = 4x^2 + 20x + 25

8 0
3 years ago
Read 2 more answers
I kinda forgot my fractions. Anybody nice to help? 17/21 - 1/7. Answer in simplest form. Thanks!
jeka94

Answer:

2/3

Step-by-step explanation:

17/21-1/7

17/21-3/21

14/21=2/3

6 0
2 years ago
Please help (click to veiw photo)
Colt1911 [192]
First, enter the variables into the expression. 
\frac{1}{3} ^{2} -  \frac{-6^2 }{2/3} 
Square 1/3 and -6 to get this: 
\frac{1}{9} -  \frac{36}{2/3}
Divide 36 by 2/3: 
\frac{1}{9} - 54
Subtract 54 from1/9 to get the final answer: 
-53 \frac{8}{9}, which is option D. 
Hope this helps!
7 0
3 years ago
The Oxy coordinate plane for two parallel lines a and a' has the equations 2x - 3y-1 = 0 and 2x - 3y + 5 = 0. respectively. Whic
Andru [333]

Answer:

Remember that a vector translation can be written as:

T(a, b)

And if we apply this to a random point, (x, y), the translation gives:

T(a, b)(x, y) = (x + a, y + b)

now, remember that a general line can be written as:

y = m*x + s

Then a point of that line can be written as: (x, m*x + s)

Then if we apply the translation to a point in the line, we get:

T(a, b)(x, m*x + s) = (x + a, m*x + s + b)

Here we have two lines:

2x - 3y - 1 = 0

2x - 3y + 5 = 0

First, let's rewrite both of these in the slope-intercept form:

y = (2/3)*x - 1/3

y = (2/3)*x + 5/3

Now let's assume that we apply a translation to the first line, that has points of the form (x,  (2/3)*x - 1/3), such that we want to get points of the form:

(x, (2/3)*x + 5/3).

Then we must have:

T(a, b)(x,  (2/3)*x - 1/3) = (x + a,  (2/3)*x - 1/3 + b) = (x, (2/3)*x + 5/3).

Then we need to solve:

(x + a,  (2/3)*x - 1/3 + b) = (x, (2/3)*x + 5/3).

This means that:

x + a = x

(2/3)*x - 1/3 + b = (2/3)*x + 5/3

From the first equation, we can see that a = 0

Now we can solve the second one to find the value of b.

(2/3)*x - 1/3 + b = (2/3)*x + 5/3

subtracting (2/3)*x in both sides, we get:

-1/3 + b = 5/3

b = 5/3 + 1/3

b = 6/3 = 2

b = 2

Then the vector translation is:

T(0, 2)

So it moves the whole line 2 units upwards.

7 0
3 years ago
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