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fredd [130]
4 years ago
10

What is the value of 1/9 +2/3 - 2/9

Mathematics
2 answers:
wariber [46]4 years ago
7 0

Answer:

5/9

Step-by-step explanation:

serious [3.7K]4 years ago
7 0

Answer:

5/9

Step-by-step explanation:

When adding and subtracting fractions we need to create a common denominator. To do this we have to make the denominator the same by using the GCF and then multiplying the numerator by how much you multiplied the denominator.

1/9 + 2/3 - 2/9

1/9 + 2/3

2/3

3 * 3 = 9

2 * 3 = 6

1/9 + 6/9

Now that we have our equation set up, add the numerators together, and keep the denominator the same.

1/9 + 6/9 = 7/9

Now we can plug in our last number.

7/9 - 2/9

These numbers already have a common denominator, so we can skip the part we did last time and just go ahead and subtract these from eachother.

7/9 - 2/9 = 5/9

And that is our solution

Hope this helps :)

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(No links) HELP ME THIS IS THE LAST QUESTION
Volgvan

Part 1

<h3>Answer:  (x+5)(x+10) - 50 = 126</h3>

Other answers are possible.

-------------

Explanation:

The old width was 5, but then it increases to x+5. The old length was 10, but now it's x+10.

The area of any rectangle is length times width.

So the area of the larger rectangle is (x+5)(x+10). Subtract off the old area of 5*10 = 50 and we get (x+5)(x+10) - 50 as the area of the L shape. Set this equal to 126 to finish setting up the equation. This is one possible answer out of many others. This is because we could expand out the (x+5)(x+10) into x^2+10x+5x+50 or simplify that to x^2+15x+50, as two possible options.

==========================================================

Part 2

<h3>Answer:  x = 6</h3>

-------------

Explanation:

Solve the equation we set up in the previous part

(x+5)(x+10) - 50 = 126

x^2+10x+5x+50-50 = 126

x^2+15x = 126

x^2+15x-126 = 0

Apply the quadratic formula from here

x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x = \frac{-(15)\pm\sqrt{(15)^2-4(1)(-126)}}{2(1)}\\\\x = \frac{-15\pm\sqrt{729}}{2}\\\\x = \frac{-15\pm27}{2}\\\\x = \frac{-15+27}{2} \ \text{ or } \ x = \frac{-15-27}{2}\\\\x = \frac{12}{2} \ \text{ or } \ x = \frac{-42}{2}\\\\x = 6 \ \text{ or } \ x = -21\\\\

Another method you could use is factoring, so you could say:

x^2+15x-126 = 0

(x-6)(x+21) = 0

x-6 = 0 or x+21 = 0

x = 6 or x = -21

The issue with this is that it may take a while to do this trial and error approach.

Whichever method you used, you'll end up with two solutions. One of those solutions doesn't make sense though. We can't have a negative length or distance value, so we ignore x = -21.

The only practical solution is x = 6

If x = 6, then the old height goes from 5 to x+5 = 6+5 = 11

If x = 6, then the old length goes from 10 to x+10 = 6+10 = 16

The new larger rectangle is 11*16 = 176 sq ft, in which we subtract off the 50 sq ft to get 176-50 = 126 sq ft, and this matches with the 126 given to us. Therefore, the answer is confirmed.

8 0
3 years ago
plz help. omar is planting trees.he has enough trees to plant 6,7,or 14 trees in each row what is the least number of trees omar
il63 [147K]
The least number of trees would be six. since it does not give a number of rows, we could just assume that there would be one row... if there is one row, then the least possible number is 6
5 0
3 years ago
Help me please For your points! Thanks​
goblinko [34]

Answer:

Step-by-step explanation:

you will read the directions 2x before solving the problem then solve the problem

5 0
2 years ago
Pls help me idk what this is
Margaret [11]

Answer:

B. -6 ≤ y ≤ 9

General Formulas and Concepts:

<u>Algebra I</u>

  • Range is the set of y-values that are outputted by function f(x)

Step-by-step explanation:

According to the line in the graph, our y-values span from -6 to 9. Since both are closed dot, they are inclusive in the range:

Range: [-6, 9] or -6 ≤ y ≤ 9

6 0
4 years ago
Read 2 more answers
If second and third hypotheses were formulated for the relationship between temperature and the pressure of a gas and are tested
Elis [28]

Answer:

working hypothesis.

Step-by-step explanation:

Hypothesis is a technique in mathematics used to identify between two events. The event is tested for hypothesis using the null hypothesis and an alternative hypothesis is set to compare the results. If there are more than one hypothesis then there is working hypothesis technique used to identify the conclusion.

3 0
3 years ago
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