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Alenkinab [10]
3 years ago
6

3x + 4y = 8 How do I solve this

Mathematics
1 answer:
dimaraw [331]3 years ago
5 0

Answer:

y= (-3x+8)/4

x = (-4 +8)/3

Step-by-step explanation:

3x + 4y = 8

-3x               -3x

4y = -3x +8     divide ALL by 4

y= (-3x+8)/4

3x + 4y = 8

    -4y          -4y

3x = -4 +8     divide ALL by 3

x = (-4 +8)/3

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inysia [295]

It will take Fred 42 minutes to type and spell check 60 pages.

  • Let the first scenario be A.
  • Let the second scenario be B.
  • Let the unknown time be X.

Given the following data;

  • Time taken A = 9 minutes
  • Number of pages A = 13 pages
  • Number of pages B = 60 pages
  • Time taken B = X minutes

To find how long it takes him to type and spell check 60 pages;

We would use direct proportion to express the work described and solve for the unknown variable (time).

9 \;minutes : 13 \;pages\\\\X \;minutes : 60 \;pages

Cross-multiplying, we have;

9 × 60 = 13 × X

540 = 13X\\\\X = \frac{540}{13}

<em>X = 41.54 ≈ 42 minutes</em>

Therefore, it will take Fred 42 minutes to type and spell check 60 pages.

Find more information: brainly.com/question/89674

7 0
3 years ago
Which quadrant? help<br><br> Quadrant 1<br><br> Quadrant 2 <br><br> Quadrant 3<br><br> Quadrant 4
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Step-by-step explanation:

Look at the picture. I highlighted quadrant 4. You can see that the graph did not pass the highlighted area.

6 0
3 years ago
The geometric mean and one extreme are given. Find the other extreme.
ahrayia [7]

Answer:

<em>a = 27</em>

Step-by-step explanation:

( √24 )² = \frac{8}{9} a

<em>a</em> = 24 ÷ \frac{8}{9} = \frac{24}{1} × \frac{9}{8} <em>= 27</em>

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Step-by-step explanation:

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The weight of extra-large egg has a Normal distribution with a mean of 3 oz and a standard deviation of 0.1 oz. In sampling dist
seropon [69]

Answer:

Probability = 0.4443

Step-by-step explanation:

The provided information is:

Consider X be the weight of extra-large egg that is normally distributed with mean \mu=3 \,oz and standard deviation \sigma = 0.1 \,oz

Also, sample size n = 12.

Thus, the probability that an egg in a carton of a dozen eggs weights more than 3.5 oz is:

\begin{aligned}P( X > 3.5) &= P(Z >\frac{3.5-3}{\frac{0.1}{\sqrt{12}}})\\&=P(Z>0.14)\\&=1-P(Z\leq0.14)\\&=1-0.557\\&=0.4443\end{aligned}

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