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Elden [556K]
4 years ago
14

3x−(2x+1) for x=7 5/13

Mathematics
1 answer:
marusya05 [52]4 years ago
8 0

Answer:

83/13 or 6.3846

Step-by-step explanation:

i subsituted for x and used a calculator

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4m^2 + 4m + 1 = 0 quadratic formula
Alex73 [517]
X= -0.5. Get Desmos, it's really helpful for this sort of thing.
4 0
3 years ago
To mix plaster for a dental model, 35 mL of water is used for 100g of plaster. How many mL of water should be used for 250g of p
laila [671]

Okay, here we have this:

Considering the provided information, we are going to calculate the requested value, so we obtain the following rule of three:

\begin{gathered} \frac{x}{35mL\text{ of water}}=\frac{250g\text{ of plaster}}{100g\text{ of plaster}} \\ x=\frac{250g\text{ of plaster}}{100g\text{ of plaster}}\cdot35mL\text{ of water} \end{gathered}

Solving for x:

\begin{gathered} x=2.5\cdot35mL\text{ of water} \\ x=87.5mL\text{ of water} \end{gathered}

Finally we obtain that 87.5mL of water should be used for 250g of plaster.

3 0
1 year ago
Everything is in the picture​
Afina-wow [57]

Answer:

It's x = -1.5

Step-by-step explanation:

4 0
3 years ago
13. How many distinct 4-letter groupings can be made with the letters from the word champion if letters may not be repeated?
ddd [48]

Answer:

N = 1680

Therefore, 1680 '4 letter groupings' can be formed from the word 'champion'

Step-by-step explanation:

Given the word 'champion' which is an 8 distinct Letter word. The number of 4 letter groupings that could be formed from it can be given by the permutation since in this case order of letters are important.

The number of distinct 4 letter groupings can be given as;

N = nPr = 8!/(8-4)!, where n= 8 and r = 4

N = 8P4 = 8!/(8-4)!

N= 8!/4!

N = 1680

Therefore, 1680 '4 letter groupings' can be formed from the word 'champion'

7 0
4 years ago
Ashley is preparing for a horse riding competition. She has trained her horse for 5 hours and has completed 195 rounds. At what
allochka39001 [22]

Answer:

1:39

Step-by-step explanation:

195 divided by 5 is 1:39.

4 0
3 years ago
Read 2 more answers
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