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ioda
4 years ago
11

Im confused on this whole math problem

Mathematics
1 answer:
katen-ka-za [31]4 years ago
5 0
I find the problem confusing because it forces a certain sequence of thought process, and I find I get way beyond these questions and answers rather quickly. I would start with the equation of part B, having already recognized the conversions of percent to decimal and the need to make the acid quantities add up. Doing the problem a different way gets you to the answer in part C without any of these "steps," so going back and trying to fill in the "steps" seems awkward, at best.

Perhaps the attachment here helps.

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What is this graph 3X-2y=7
trapecia [35]
3x-2y=7
3x=7
x=7/3

-2y=7
y=-7/2

so...(7/3,-7/2)
5 0
4 years ago
How do the 2s in 12.5 and 0.912 compare?
Vsevolod [243]

Answer:

  D The value of the 2 in 12.5 is 1,000 times the value of the 2 in 0.912

Step-by-step explanation:

The value of a digit in a number can be found by setting the other digits to zero.

The value of 2 in 12.5 is 2.

The value of 2 in 0.912 is 0.002.

The ratio of values is 2.000/0.002 = 2000/2 = 1000.

The value of 2 in 12.5 is 1000 times the value of 2 in 0.912.

8 0
3 years ago
Read 2 more answers
If m proportional to n and m=5 when n=4.what is the valuue of m?when n=18
Dovator [93]

Answer:

m=22.5

Step-by-step explanation:

m is proportional to n means there is some constant k such that:

m=kn

If m=5 when n=4 then we have the following equation to solve for our constant k:

5=k(4)

5=4k

Divide both sides by 4:

5/4 =k

So k=5/4 no matter what (m,n) pair they give you where the equation is m=kn.

m=(5/4)n

What is m when n=18?

m=(5/4)(18)

m=(5/2)(9)

m=45/2

m=22.5

5 0
3 years ago
Simplify. (5x2+2x−5)−(3x2+3x+1)
guapka [62]

Answer:

x² - x - 6

Step-by-step explanation:

Step 1: Write expression

(5x² + 2x - 5) - (3x² + 3x + 1)

Step 2: Distribute negative

5x² + 2x - 5 - 3x² - 3x - 1

Step 3: Combine like terms (x²)

2x² + 2x - 5 - 3x - 1

Step 4: Combine like terms (x)

x² - x - 5 - 1

Step 5: Combine like terms (constants)

x² - x - 6

4 0
3 years ago
Read 2 more answers
Y=-1/2(x+ 5)^2-2 Step by Step HELP
Zina [86]
y=-\frac{1}{2}(x+5)^2-2\\
y=-\frac{1}{2}(x^2+10x+25-2)\\
y=-\frac{1}{2}(x^2+10x+23)\\


this is not factorable so you must apply the quadratic formula and you'll end up with 

x=-5-2i
x=-5+2i
4 0
4 years ago
Read 2 more answers
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