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4 years ago

What is the simplest form 3/4 + 2/5

Mathematics

2 answers:

maw [93]4 years ago

7 0

Answer:

1 3/20

Step-by-step explanation:

3/4 + 2/5

Get a common denominator of 20

3/4 *5/5 + 2/5 *4/4

15/20 + 8/20

23/20

20/20 + 3/20

1 3/20

Vinil7 [7]4 years ago

5 0

Answer:

1 and 3/20

Step-by-step explanation:

You want to make the denominators the same so you can answer them:

3/4 = 15/20

2/5 = 8/20

You add 15 and 8, which equals 23.

23/20 = 1 and 3/20.

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A chef cooked 7 kilograms of food for dinner. He ate 11/12 of the amount, how much did he eat?

Bogdan [553]

11/12 of 7 is simply their product.

$\bf 7\cdot \cfrac{11}{12}\implies \cfrac{77}{12}\implies 6\frac{5}{12}$

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4 years ago

2. Follow the process used to simplify the expression. Tell if it was done correctly. If not, explain and correct the error by s

wariber [46]

Answer:

No, the simplification is not done correctly. When multiplying

$\frac{2}{3}\times-9$ we should get -6 instead of -9.

the correct answer is 12k-8

Step-by-step explanation:

We need to tell if process was done correctly. If not, explain and correct the error by showing your own work.

The steps given are:

$\frac{2}{3} (6k - 9) + 8k - 2\\=4k - 9 + 8k - 2\\=12k - 11$

No, the simplification is not done correctly. When multiplying

$\frac{2}{3}\times-9$ we should get -6 instead of -9.

Correcting the error:

$\frac{2}{3} (6k - 9) + 8k - 2\\=4k - 6 + 8k - 2\\=12k - 8$

So, the correct answer is 12k-8

5 0

3 years ago

The mean, median and mode of the five numbers are same. if four numbers are 7,7,5 and 7, what must be the fifth number?

Morgarella [4.7K]

Answer:

The fifth number is 9

Step-by-step explanation:

7 is the mode because it appears the most.

7 has to be the median, so the fifth number could be anything.

7 has to be the mean, so you would do:

7 x 5 = 35

35 - 7 - 7 - 7 - 5 = 9

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3 years ago

The triangle shown below has an area of 25 units. Find the missing side. 10 x

riadik2000 [5.3K]

Answer:

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Step-by-step explanation:

4 0

3 years ago

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Solve for x in the equation ]x^{2} - 12x + 59 = 0

Vedmedyk [2.9K]

Step-by-step explanation:

$x^{2} - 12x + 59 = 0$

Given equaiton is in the form of ax^2 +bx+c=0

we apply quadratic formula to solve for x

$x= \frac{-b+-\sqrt{b^2-4ac} }{2a}$

a= 1 b = -12 and c= 59

$x= \frac{12+-\sqrt{(-12)^2-4(1)(59)}}{2(1)}$

$x= \frac{12+-\sqrt{92}}{2}$

$x= \frac{12+-2\sqrt{23}}{2}$

Divide the 12 and square root terms by 2

$x=6+-\sqrt{23}$

so $x=6+\sqrt{23}$ and $x=6-\sqrt{23}$

8 0

3 years ago

Read 2 more answers