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emmainna [20.7K]
1 year ago
10

Help asap I will give u huge amount of brainly points

Mathematics
2 answers:
Minchanka [31]1 year ago
8 0

Answer:

\boxed{\sf -\dfrac{5}{8}}

Use BODMAS rule,

where:

  • brackets
  • order
  • division
  • multiplication
  • addition
  • subtraction

Given expression:

\rightarrow \sf -\dfrac{1}{5} \times [\:4-14\times\left(\dfrac{1}{4} \right)^2]

simplify exponent

\rightarrow \sf -\dfrac{1}{5} \times [\:4-14\times\left(\dfrac{1}{16} \right)]

\rightarrow \sf -\dfrac{1}{5} \times [\:4-\(\dfrac{14}{16}]

\rightarrow \sf -\dfrac{1}{5} \times [\:4-\(\dfrac{7}{8}]

\rightarrow \sf -\dfrac{1}{5} \times [\:\dfrac{32}{8} -\(\dfrac{7}{8}]

\rightarrow \sf -\dfrac{1}{5} \times [\:\dfrac{25}{8}]

multiply fractions

\rightarrow \sf -\dfrac{25}{40}

\rightarrow \sf -\dfrac{5}{8}

erica [24]1 year ago
6 0

Answer:

-\dfrac{5}{8}

Step-by-step explanation:

Given expression:

-\dfrac{1}{5}\left[4-14\left(\dfrac{1}{4}\right)^2\right]

\textsf{Apply exponent rule} \quad \left(\dfrac{a}{b}\right)^c=\dfrac{a^c}{b^c}:

\implies - \dfrac{1}{5}\left[4-14\left(\dfrac{1^2}{4^2}\right)\right]

\implies -\dfrac{1}{5}\left[4-14\left(\dfrac{1}{16}\right)\right]

\implies -\dfrac{1}{5}\left[4-\dfrac{14}{16}\right]

Rewrite 4 as an improper fraction with 16 as the denominator:

\implies -\dfrac{1}{5}\left[4 \cdot \dfrac{16}{16}-\dfrac{14}{16}\right]

\implies -\dfrac{1}{5}\left[\dfrac{64}{16}-\dfrac{14}{16}\right]

\textsf{Apply the fraction rule} \quad \dfrac{a}{c}-\dfrac{b}{c}=\dfrac{a-b}{c}:

\implies -\dfrac{1}{5}\left[\dfrac{64-14}{16}\right]

\implies -\dfrac{1}{5}\left[\dfrac{50}{16}\right]

\textsf{Apply the fraction rule} \quad \dfrac{a}{c} \cdot \dfrac{b}{d}=\dfrac{a \cdot b}{c \cdot d}:

\implies -\dfrac{1 \cdot 50}{5 \cdot 16}}

\implies -\dfrac{50}{80}}

Reduce the fraction by dividing the numerator and denominator by 10:

\implies -\dfrac{5}{8}

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Answer:

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Step-by-step explanation:

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3 years ago
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Convert the mixed number <span>21 <span>2/3</span></span><span> into an </span><span>improper fraction.
</span>15⋅<span>65/3

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3 years ago
Helppppppppp pleaseeeeeee fasttttt
topjm [15]
I think it’s 104,974
Because PEMDAS,
so first deal with exponents and 3 to the fourth power is 81. 6 to the fourth power is 1,296.
Next in PEMDAS is multiplication and division, so 1,296 times 81 is 104,976. Then 4 divided by 2 is 2.
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5 0
3 years ago
Read 2 more answers
of 320 consumers polled, some purchase blu-ray movies, some only purchase movies on dvd, and some do both. if 300 people polled
Helga [31]

Answer:

20 people only buy dvds.

Step-by-step explanation:

There are two groups in this problem. One group of people that buys dvds and one that buys blu rays. The total amount of people who buy blu rays is 300, but there's an intersection between the groups and the size of this is 280 people who actually buy both. In order to find out how many people only buy DVDs we first need to figure out how many only buy blu-rays. That is:

people who only buy blu rays = people who buy blu rays - people who buys blu rays and dvds

people who only buy blu rays = 300 - 280 = 20

We can now calculate the amount of people who only buy dvds and that is:

people who only buy dvds =total amount of people - ( people who only buy blu rays + people who buy both)

people who only buy dvds = 320 - (20 + 280) = 320 - 300 = 20 people

3 0
3 years ago
Which is the correct answer
VashaNatasha [74]

Let s denote the number of pages in each issue of the sports magazine.

Let t denote the number of pages in each issue of the technology magazine.

Given that a sports magazine prints 12 issues per year and a technology magazine prints 10 issues per year.The total number of pages in all the issues of the sports magazine for one year is 32 more than the total number of pages in all the issues of the technology magazine for one year.

This can be written in equation as,

12s=10t+32

Since, it is given that, "Each issue of the sports magazine has 18 fewer pages than each issue of the technology magazine".

This can be written in equation as,

s=t-18

Thus, the set of equations that represent the given data is

12s=10t+32 and s=t-18

Hence, Option A is the correct answer.

7 0
3 years ago
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