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3 years ago

Can anyone help me with this?

Mathematics

1 answer:

Akimi4 [234]3 years ago

7 0

1) 2/5
2) 3/7
3) - 7/18
4) 3/5
5) - 5/18
6) 8/21
7) 2/5
8) -5
9) 9
10) 4 1/2
11) - 77/20
12) 6 10/21

By the way, to write questions 3,5 and 11, you write on the page,
(This is for Question 11)

77
- ----
20

You might be interested in

16,321,407.23 to the nearest tenth

never [62]

Answer: 16,321,407.2

Step-by-step explanation:

Round it. The tenth position is the spot where the .2 is, so just take the number before it(.03) and see if it round up or down. In this case, down, so your answer is 16,321,407.2

5 0

3 years ago

A rectangle whose perimeter is one hundred four feet. Has a width that is te feet shorter Then its length. What are the dimensio

Stolb23 [73]

Length of the rectangle is 24.5 ft and width is 27.5 ft

Step-by-step explanation:

Step 1: Let the length of the rectangle be x, then width = x - 3. Find dimensions when perimeter = 104 ft

Perimeter = 2(length + width)

⇒ 104 = 2(x + x-3)

⇒ 104 = 2(2x - 3)

⇒ 104 = 4x - 6

⇒ 4x = 110

∴ x = 110/4 = 27.5

⇒ x - 3 = 24.5

8 0

4 years ago

Need help with problem 40,41 and 42! 15 points

vovikov84 [41]

Answer:

40) w = 32/3

41) x = 23/4

42) w = 1/12

Step-by-step explanation:

40) Real world problem:

If Lisa takes $7\frac{3}{8}$ of the pie from a total of $w$ slices, then the remaining pie is $3 \frac{7}{24}$ . Find w.

So, the equation would become:

$w - 7 \frac{3}{8} = 3 \frac{7}{24}$

$\implies w = 3 \frac{7}{24} + 7 \frac{3}{8}$

This can be written as:

$w = 3 + \frac{7}{24} + 7 + \frac{3}{8}$

This is equivalent to $3 + \frac{7}{24} + 7 + \frac{9}{24}$

Since, the denominator is the same, the numerators can be added now.

$\implies w = 10 + \frac{16}{24}$

$\implies w = 10 + \frac{2}{3}$

$i.e., w = 10 \frac{2}{3} = \frac{32}{3}$

Hence, the answer is 32/3.

41) The given equation is: $2 \frac{1}{2} + x = 8\frac{1}{4}$

$2 \frac{1}{2} = \frac{5}{2}$ and

$8 \frac{1}{4} = \frac{33}{4}$

So, $x = \frac{33}{4} - \frac{10}{4}$

$\implies x = \frac{23}{4}$

The answer is 23/4.

42) The given equation is $$ w - \frac{1}{3} = \frac{5}{12}$

$\implies w = \frac{5}{12} - \frac{1}{3}$

$w = \frac{5}{12} - \frac{4}{12}$

$w = \frac{1}{12}$

The answer is 1/12.

7 0

3 years ago

Mary is converting 30 yards per hour into feet per hour. What conversion should she use?

Nina [5.8K]

1 yard per hour= 3 feet per hour is the conversion.
Hope this helps

6 0

4 years ago

You can copy the data into Excel by highlighting the data, right-clicking and selecting Copy, then opening Excel, clicking on a

Iteru [2.4K]

Answer:

Low income group :

Mean = 22.100

Median = 22.000

Standard deviation = 4.717

High Income group :

Mean = 19.771

Median = 20.000

Standard deviation = 3.255

Step-by-step explanation:

Low income : 19,20,13,28,21,27,16,21,19, 19,34,24, 24,14,24,25,23,22,20,21,14,23,17,26,24,24,20,24,27,16,22,17,29,20,25,22,20,34,24,22

High Income : 23 19 19 18 20 18 17 25 13 24 25 17 21 19 17 22 22 15 19 23 19 23 22 20 20 20 13 21 16 13 21 24 23 21 20

Using Excel :

Mean of low income, Σx / n = 884/40 = 22.100

Median of low income group : 1/2(n+1)th term = Median of low income = 22.000

Standard deviation of low income group :

√(Σ(x - mean)²/n) = 4.717

High Income group :

Mean of high income, Σx / n = 692/35 = 19.771

Median of high income group : 1/2(n+1)th term = Median of high income = 20.000

Standard deviation of low income group :

√(Σ(x - mean)²/n) = 3.255

5 0

3 years ago