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3 years ago

2/5 × [ -3/7] - 1/6 × 3/2 + 1/14 × 2/5

Mathematics

2 answers:

Nata [24]3 years ago

8 0

Answer:

$\frac{-11}{28}$

Step-by-step explanation

2/5 × (-3/7) - 1/6 × 3/2 + 1/14 × 2/5

= -6/35 - 1/4 + 1/35

= -11/28

REY [17]3 years ago

6 0

Step-by-step explanation:

here is the answer watch the picture

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Jobisdone [24]

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3 years ago

Assume that y varies inversely

Marina86 [1]

Answer:

y = 2

Step-by-step explanation:

y varies inversely with x setup is:

y = k/x

7 = $\frac{k}{2/3}$ (find 'k')

k = 7/1 · 2/3

k = 14/3

use what you know about 'k' and 'x' to solve for 'y'

y = 14/3 ÷ 7/3 (remember to multiply by the reciprocal when dividing fractions)

y = 14/3 · 3/7

y = 2

3 0

3 years ago

PLEASEEEEEEEEEE HELP ASAP PLEASEEEEEEEEEE

icang [17]

Answer:

3rd choice

Step-by-step explanation:

In division for variables with same base, you do subtract top exponent minus bottom exponent. She did that correctly since -3-(-1)=-3+1=-2 and -2-1=-3.

The problem said m=-2 and n=4 and she replace m with (-2) and n with (4). She did this correctly.

You can multiply base numbers unless the exponents are the same 4 doesn't have the exponent -2 on it so you can't do (4(-2))^(-2)

The error is the 3rd option.

7 0

3 years ago

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Tv screen is 15 in high and 20 in wide what's the answer for length to width

vampirchik [111]

Length to width is : 20:15 which reduces to 4:3 or 4/3 or 4 to 3

4 0

4 years ago

A vineyard has 145 acres of Chardonnay grapes. A particular soil supplement requires 5.50 grams for every square meter of vineya

SashulF [63]

3230 kilograms of the soil supplement are required for the entire vineyard

<h3>Further explanation</h3>

Some units that need to be recalled are as follows :

<em>1 km² = 247 acres</em>

Let's tackle the problem now!

A vineyard has 145 acres of Chardonnay grapes.

$145 ~ acres = \frac{145}{247} \times 1 ~ km^2$

$145 ~ acres = \frac{145}{247} ~ km^2$

$\boxed {145 ~ acres \approx 0.587 ~ km^2}$

A particular soil supplement requires 5.50 grams for every square meter of vineyard.

$1 ~ m^2 \rightarrow 5.50 ~ gram$

$1 ~ km^2 = 10^6 ~ m^2 \rightarrow 5.50 \times 10^6 ~ gram$

$1 ~ km^2 \rightarrow 5.50 \times 10^6 \times 10^{-3} ~ kg$

$\boxed {1 ~ km^2 \rightarrow 5.50 \times 10^3 ~ kg}$

$145 ~ acres = \frac{145}{247} ~ km^2 \rightarrow \frac{145}{247} \times 5.50 \times 10^3 ~ kg$

$145 ~ acres \rightarrow \frac{797500}{247} ~ kg$

$145 ~ acres \rightarrow 3230 ~ kg$

<h2>Conclusion :</h2>

It required 797500/247 kg ≈ 3230 kg of the soil supplement for the entire vineyard

<h3>Learn more</h3>

Conversion Factor of Speed : brainly.com/question/11224343
The Distance of the Cheetah : brainly.com/question/7171227
The Speed of The Car : brainly.com/question/568302

<h3>Answer details</h3>

Grade: Middle School

Subject: Mathematics

Chapter: Arithmetic

Keywords: Addition , Subtraction , Multiplication , Division , Number , Expression , Time , Duration , Write

7 0

4 years ago

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