Match each to the description

Answer:

Check Description for answer

Step-by-step explanation

do it urself

Answer:

A) solution 2 is more acidic than solution 1

Step-by-step explanation:

A chemist prepares two acid solutions:

Solution 1: 3 parts sulfuric acid to 7 parts water

Ratio of sulphur to water: 3/7 (3:7)

Solution 2: 4 parts sulfuric acid to 9 parts water

Ratio of sulphur to water: 4/9 (4:9)

___________________________________________________

Part A: (using ratios to determine which solution is more acidic)

First we make same denominator, since the denominators are 9 and 7, we have to find the lcm (lowest common multiple) they both have with is 63. To do that, we must multiply the denominators with either 7 or 9.

Solution 1: Numerator (3) multiplied by 9 and then denominator (7) multiplied by 9. This makes out fraction/ratio 27/63

Solution 2: Numerator (4) multiplied by 7 and then denominator (9) multiplied by 7. This makes out fraction/ratio 28/63

Since 28/63 (or just 28) is a larger quantity than 27/63 (or just 27) this means solution 2 is more acidic than solution 1.

Mathematical Line (Not sure what you would call this lol): 28 > 27

Part B: (Let 'y' amount of sulfuric acid mix with 'x' amount of water)

Equation of solution 1: y = 3/7x

Equation of solution 2: y = 4/9x

Please find attachment for graph.

Part C: Don't have a graph, sorry! (part a. method is more preferred to find more acidic because it gives the actual acidic amount.)

Answer:

D

Step-by-step explanation:

Answer: y = -1/4x - 6

Step-by-step explanation: the slope is -1/4 because slope = rise/run, the rise is 1, and the run is 4 and the slope is negative. the y intercept is -6 because it passes through -6 at the y axis.

Answer:

-1/4x + -6

Step-by-step explanation:

The slope is -1/4 because slope = \(\frac{rise}{run}\),

So:

-\(\frac{1}{4}\) is the slope, also is negative.

The y intercept is -6 because it passes through -6 at the y axis.

( I also checked it on khan Academy and it was correct)

Hope this helps :)

Pls brainliest...

Answer:

when we multiply a number by its reciprocal we get-

For example- 2/1 × 1/2 = 1 . Every number has a reciprocal except 0 (1/0 is undefined)

Answer:

12x12 12x6 H = 46cm

Step-by-step explanation:

took quiz

Answer:

46 cm

Step-by-step explanation:

I learned this formula in math last year

Answer:

Step-by-step explanation:

I would ask my teacher for help if no, then it seems like you would mark a line in the numbers line or smth just giving you an idea sorry if this never helped :(

Answer:

61/100

Step-by-step explanation:

Remeber that the first place to the right after the decimal is the tenth place. so if it were 0.6, 6 is in the tenth place, and it would be 6/10. what place the right most digit is in tells you the denomiator, which is the place I put the 100.

please do press that valuable little crown for me.

Answer:

No the first one needs to have one as an additive inverse and same for the second one

Step-by-step explanation:

I already explained above

Answer:

does not make sense

Step-by-step explanation:

Answer:

This does not make since at all.

Step-by-step explanation:

Answer:

0,8

Step-by-step explanation:

10/8=0,8

Answer:

The scale factor is 1.25

Step-by-step explanation:

10/8 =1.25

(1.25 x 8 =10)

Hope this helps!

Answer:

4÷42.78=10.69

Step-by-step explanation:

Answer:

1. 113.4/9=12.6

2. 6.6/12= 0.55= 0.6

3. 28.5/10= 2.85= 2.9

4. 18.92/11= 1.72= 1.7

5. 5.37/3= 1.79= 1.8

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

its simple greatest number less that 400 is 399

Answer:

388

Step-by-step explanation:

Definition from Wikipedia

In mathematics, the greatest common divisor (GCD) of two or more integers, which are not all zero, is the largest positive integer that divides each of the integers. For two integers x, y, the greatest common divisor of x and y is denoted as gcd(x,y) . For example, the GCD of 8 and 12 is 4, that is, gcd(8,4)=4  (https://en.wikipedia.org/wiki/Greatest_common_divisor)

Methodology to find greatest common denominator(factor) for 2 numbers

Note that even though I have listed all divisors of the higher number, you don't have to compute all divisors. You can stop figuring out the divisors once the larger number is divisible by the number that is higher than 4 but slosest to i. For example, in the case of 396, I would stop computing as soon as I found it is divisible by 6

Answer:

+1*(242x^22+729x+6237)

Step-by-step explanation:

(1): "x2"   was replaced by   "x^2

           x22

Simplify   ———

            9

         x       22 x22

 ((0-(9•——))-7)-(——•———)

        11       9   9

           22

Simplify   ——

           9

         x       22 x22

 ((0-(9•——))-7)-(——•———)

        11       9   9

            x

Simplify   ——

           11

              x            22x22

 ((0 -  (9 • ——)) -  7) -  —————

             11             81  

The given inequality,  -9x/11 - 7 < -5 , the range of value of x will be, x  >     -22/9

Inequalities are the comparison of mathematical expressions, whether one quantity is greater or smaller in comparison to another quantity.

We use these symbols to represent inequalities, '>' , '<', '≥', '≤'

Given that,  

The inequality,

-9x/11 - 7 < -5

-9x/11      <  -5 + 7

-9x/11      <    2

       -9x  <     22

           x  >     -22/9

Hence, the range is -22/9

To know more about Inequalities check:

https://brainly.com/question/30228778

#SPJ2

Answer:

I'm not sure how it wants the inequalities for these

18. 18

19. 20

8A:

1) a. 7/25 b. 79/50 c. 31/250 d. 33/500

2) a. 0.04 b. 6.33 c. 0.0002 d. 0.336666667

3) a. 60% b. 90% c. 4.8% d. 120% e. 48% f. 124%

Apologies if not all are correct :)

Step-by-step explanation:

Hey there!

The length is 40 cm more than breadth.

Sp let the breadth be x.

So, length will be 40+x

Now, we know that Perimeter of a rectangle is 2(Length+Breadth)

We can write that

380 cm = 2(40+x+x)

190 = 40+2x

2x = 150

x = 75 cm.

So, breadth is 75 cm.

And length is 75+40 = 115 cm.

Hope it helps:)

Answer:

W= 75  L= 115

Step-by-step explanation:

3.8m= 380cm

Perimeter= 380cm

Perimeter formula: 2(L+W)

L= length W= width

The length in the problem equals 40cm more then the width. so the length equals (w+40) or (40+w). now subsitute that into the perimeter formula.

2(40+W+W)=380

Now solve for W

2(40+W+W)=380

Divide by 2 on each side, to get rid of it on the left (like below)

40+W+W= 190

subtract 40 off both sides

2w= -40+190

Divide by 2 on both sides

2w=150

W= 75

Since the width is 75, this means that the length is 40 more than 75, therfore

L= 75+40=115

Answ

Step-by-step explanation:

Answer:

Julie spent $10 more on the dress.

Step-by-step explanation:

Say the dress's original price is 100.

10% of 100 is 10. so Julie would've paid $90 for the dress

If Mindy buys the same dress when it is 20% off she would've paid $80 for the dress.

Answer:3.25 mph and 1.25 mph

Step-by-step explanation:

Let s - speed in still water, c - speed of current.

We have the following equations:

2(s + c) = 9

2(s - c) = 4

Simplify:

s + c = 4.5

s - c = 2

Add up and solve for s:

2s = 4.5 + 2

2s = 6.5

s = 6.5/2

s = 3.25 mph

Find c:

c = 3.25 - 2 = 1.25 mph

Answer:

I believe it's A.

Step-by-step explanation:

The formula for the perimeter of a rectangle: 2(l + w)

Since we have not found x, you would assume it hasn't been doubled yet by the 2. Since the width = 14, it is doubled to 28.

Next, we know from looking at the formula that l and w are added together, so inside the brackets is an addition problem. ( + 28)

Since we know that l = x and l has to be doubled, it will be = (2x +)

If we combine those two equations together it is =

2x + 28 = 48

Answer: Surface Area = 2 x (5x2 + 3x2 + 5x3) = 62 centimeters

Surface area of a right rectangular prism = 2(lh + wh + lw)

Step 1: Label the Given-

Length (l) = 5cm,      Width (w) = 3cm,      Height (h) = 2cm

Step 2: Replace the given-

Surface Area = 2 x (5x2 + 3x2 + 5x3)

= 2 x (31)

Surface Area = 62 centimeters

Horus got his answer, by applying only what lays inside the parentheses. To get the right answer, Horus must multiply what they got by 2:

2 x (31) = 62 centimeters

Answer:

SA= 15+6+10+10+15+6 = 62

Step-by-step explanation:

take your top rectangle multiply length and width= 15

Take the one right below it take the 2cm, and multiply it with 3=6

after that one doe 3x5 again=15

Then, 3x2=6

And then 5x2=10

And then once more=10