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jeyben [28]
3 years ago
12

So these I pretty positive I know how to set up. But, I don’t know how to get the work. This is due tomorrow... I JUST NEED HELP

! Please

Mathematics
1 answer:
zhenek [66]3 years ago
8 0
You don't divide for 17. You multiply 0.2 times 60 and end up getting 12
You divide for 19. (25/0.01)= 2500
.
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Snape has 2000 mL of a magic potion solution that is 30% DeMuggle Juice. He also has hundreds of 25 mL bottles that are full of
ELEN [110]

Answer:

8

Step-by-step explanation:

We use the equation for the percentage of solute concentration in a solution:

volume percent = \frac{volume of solute}{volume of solution} * 100   (1)

In this case the equiation (1) is transformed into:

34 = \frac{Total volume of DeMuggle juice}{Total volume of the magic potion} * 100   (2)

n = number of times he must waves his wand to have a solution that is at least 34% DeMuggle juice.

Vpo = Initial volume of the magic potion = 2000ml

Vjo= Initial volume of DeMuggle juice = 30% * Vpo = (0.3)2000 = 600ml

Vb= Volume of a bottle = 25ml

Vjb = DeMuggle juice volume in a bottle = 75% * Vb = (0.75)25= 18.75ml

Vpmt = Total volume of the magic potion = 2000 + 25*n = Vpo + Vb * n

Vjt = Total volume of DeMuggle juice = 600 + 18.75*n = Vjo + Vjb * n

Replacing in (2):

34 = \frac{600 + 18.75*n }{2000 + 25*n} *100

\frac{34}{100} (2000 + 25*n) = (600 + 18.75* n)

680+8.5*n=600+18.75*n

80 = 10.25*n

n = 7.8

Since the number of times the wand should be waved must be an integer, it approximates 8

Replacing n=8 in (1)

\frac{600+(18.75*8)}{2000+(25*8)} *100 = 34.0909

6 0
4 years ago
Which of the interpretations for the given expression is correct 5(3x-4)^2
Flauer [41]
<span>Which of the interpretations for the given expression is correct 5(3x-4)^2 

is "5 times the square of the binomial 3x - 4."</span>
3 0
4 years ago
Read 2 more answers
PLEASE HELP!! 10 POINTS!!WILL MAKE BRAINLIEST
Grace [21]

58):  Solution =====>    Letter Choice,  (C)      1.25m      =       1.50(m      -      2)

Let's solve your equation step-by-step.

1.25m       =      1.5(m     −     2)

Step 1: Simplify both sides of the equation.

1.25m     =        1.5(m    −      2)

1.25m     =      (1.5)(m)       +        (1.5)(−2)                                  (Distribute)

1.25m       =       1.5m          +           −3

1.25m        =       1.5m       −       3

Step 2: Subtract 1.5m from both sides.

1.25m      −       1.5m      =      1.5m     −      3      −       1.5m

−0.25m           =            −3

Step 3: Divide both sides by -0.25.

-0.25m/ -0.25        =          -3/ -0.25

m       =========>    12

Answer    ===========>      m       =        12



59):   Let  your Number be:    D  

Solution:     =====>    7D       =      5D        -      3   =====>  -3/2    =====>    -1.5

Seven Times a number:

7   *     D      or    7(D)

Three Less than Five Times that Number:

5D     -     3

7D       =        5D       -    3

Solve for D:

7D   =    5D     -    3

Subtract   5D   from both sides:

7D   -    5D      =    5D     -     3      -   5D

2D       =           -3

Divide both sides by  2:

2D/2     =       -3/2

D                   =             -3/2

Answer  ==>  D  ====>      -3/2     ========>    Letter Choice, (F)      - 1.5




60):    Letter Choice,   (C),    3x      -     9      =    5x  

Let's solve your equation step-by-step.

3x       −      9       =         5x

Step 1: Subtract 5x from both sides.

3x      −       9       −      5x      =      5x     −      5x

−2x       −     9       =      0

Step 2: Add 9 to both sides.

−2x      −       9        +      9       =       0       +      9

−2x       =       9

Step 3: Divide both sides by -2.

-2x/ -2      =      9/ -2

x        =            -9/2

Answer   ========>         x         =       -9/2       =======>  4.5




61):   Subtract:

500    -      120

=      380

Need to total 500:

380

Find Number of Weeks Divide:

380/20    =      19  Weeks

7   *   19     =    133  

Days it will take Nichole to save  $500.00 =======>   133 Days





62):    Gridded Response:

Solve:

- 2(x     -     1 )       +        5x       =     2(2x        -     1 )  ======>      x     =      4

( -2 )(x)     +     ( -2)( - 1 )    +     5x     =   (2)(2x)      +    (2)( - 1 )

Distribute:

- 2x     +  2     +    5x     =     4x      +        - 2

( - 2x     +    5x )       +        (2)        =       4x     -     2       (Combine  Like terms):

3x    +   2        =    4x       -    2

3x         +      2     =      4x      -   2

Subtract   4x   From both sides:

3x     +    2      -     4x       =       4x     -     2      -    4x     -     x     +   2     =      -2

Subtract  2   from both sides:

-x     +     2    -   2       =         -2       -      2

-x         =       -4

Divide both sides  by     -1:

-x/ -1      =      -4/ -1

x         =     4

Answer   =====>      x      =      4           Check the Graph down below  for Gridded Response on Number 62.      






Hope that helps!!!                                            : )     _P_












6 0
3 years ago
Solve the inequality.<br> |3x + 7| &lt;4
VashaNatasha [74]

Answer:

-\frac{11}{3} \leq x\leq -1

Hope this helps!! <3

8 0
3 years ago
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Which statement is true about the solution to this system of
ivann1987 [24]
The two lines coincide. The two equations have the same slope and intercept. If you multiply the second equation by 3, you’ll get the first equation.
5 0
3 years ago
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