All categories

3 years ago

-1/5 plus 7/10 Whats the answer ??/

Mathematics

1 answer:

lubasha [3.4K]3 years ago

3 0

Answer:

Hi Friend!

The Correct Answer is 1/2

Step-by-step explanation:

The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.

LCD(-1/5, 7/10) = 10

Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.

You might be interested in

What is the correlation coefficient with the following data points: (15,36), (13,22), (12,6), (11,20)?

Rina8888 [55]

Answer:

A. 0.75

Step-by-step explanation:

The formula for the correlation coefficient r is

$r =\frac {n \sum{xy} - \sum{x}\sum{y}}{\sqrt{[n \sum{x^{2}}- (\sum{x})^{2}}][n \sum{y^{2}}- (\sum{y})^{2}]}$

It's easier to use a statistical calculator, but this question probably expects you to do it by hand.

Let’s write a table for easy calculation.

x y xy x² y²

15 36 540 225 1296

13 22 286 169 484

12 6 72 144 36

11 20 220 121 400

51 84 1118 659 2216

(Σx)² = 2601

(Σy)² = 7056

$r =\frac{4\times1118-51\times84}{\sqrt{[4\times659-2601][4\times2216-7056]}}$

$r =\frac{4472-4284}{\sqrt{[2636-2601][8864-7056]}}$

$r =\frac{188}{\sqrt{35\times1808}}$

$r =\frac{188}{\sqrt{63280}}$

$r =\frac{188}{251.6}$

r = 0.747

The graph below shows that there is a poor correlation among the points.

6 0

3 years ago

Suppose a quarter of all the elephants in an African wildlife refuge have ear tags. If there are exactly 60 tagged elephants, wh

ruslelena [56]

240 Because

1/4 = 25% × 4 = 100 So 60×4=240

4 0

3 years ago

Hhhhellllllllllpppppppppppp

katovenus [111]

Answer:

(its blurry-

Step-by-step explanation:

5 0

2 years ago

Im new to this, and feeling hopeless '-'

Ede4ka [16]

$\left[\begin{array}{ccc}22&18\end{array}\right]\times\left[\begin{array}{cccc}5&18&32&40\\25&40&38&12\end{array}\right]\\\\=\left[\begin{array}{cccc}22\cdot5+18\cdot25&22\cdot18+18\cdot40&22\cdot32+18\cdot38&22\cdot40+18\cdot12\end{array}\right]\\\\=\left[\begin{array}{cccc}560&1116&1388&1096\end{array}\right]$

second question:

January: 32 · 22 + 38 · 18 = 704 + 684 = 1388

December: 18 · 22 + 40 · 18 = 396 + 720 = 1116

1388 - 1116 = 272

Answer: $272.

7 0

3 years ago

1.) 2x−9y=14 2.) x=−6y+7 please help!!

harkovskaia [24]

Answer

7,0

Step-by-step explanation:

Substitute -6y+7 into problem one where the x is

distribute the 2 and subtract the 9 y and you will get

-21y+14=14

subtract 14 from both sides and it will be -21y=0 so y will be 0

substitute the 0 into equation 2 and find x=7

7 0

3 years ago

Read 2 more answers