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lbvjy [14]
2 years ago
14

What is 1/4 - [-3/8] =

Mathematics
2 answers:
Norma-Jean [14]2 years ago
7 0

1/4 - [-3/8]

\frac{1}{4}- (-\frac{3}{8})

Negative times negative become positive

\frac{1}{4} + \frac{3}{8}

Now to add fractions we make the denominator same

4  and 8 are in the denominator

Least common denominator of 4  and 8 is 8

To make denominators same , we multiply the numerator and denominator of first fraction by 2.

\frac{1*2}{4*2} + \frac{3}{8}

\frac{2}{8} + \frac{3}{8}

The denominators are same so we combine the numerators

\frac{2+3}{8}

\frac{5}{8}


WINSTONCH [101]2 years ago
6 0

\frac{1}{4}  -  \frac{ - 3}{8}  =  \frac{5}{8}
5/8 cross multiply on the top then multiply the denominator you get 20/32 reduce that it's 5/8
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Which expression correctly states that XY is congruent to VW?
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XA is congruent to VB,
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VB + BW = VW

Then we can conclude that if the statements above are true, XY and VW must be congruent to each other. 

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Given X(0, 2), Y(-2, 2), and Z(-2, 0), find the coordinates of X', Y', and Z' after a dilation with scale factor -4. ​
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3 years ago
Help with this question, please!!
IceJOKER [234]

Answer:

  72°

Step-by-step explanation:

You correctly found x, but the measure of the angle is ...

  4x-22 = 4·23.5-22 = 72°

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3 years ago
Uma rede de supermercados fornece a seus clientes um cartão de crédito cuja identificação é formada por 3 letras distintas (dent
Vitek1552 [10]

Answer:

The correct option is (A) 33,600.

Step-by-step explanation:

The question is:

A supermarket chain provides its customers with a credit card whose identification is formed by 3 different letters (among 26), followed by 4 different digits. A given city will receive cards with L as the third letter, the last number is zero and the penultimate is 1. The total number of distinct cards offered by such supermarket chain for that city is A) 33600 B) 37800 C) 43200 D ) 58500 E) 67600

Solution:

The general format of the credit cards provided by a supermarket chain is as follows:

<u>X</u> <u>X</u> <u>X</u> <u>#</u> <u>#</u> <u>#</u> <u>#</u>

Here, <em>X</em> represents letters and # represents numbers.

All the three letters have to different and all the four numbers have to different, i.e. no repetition allowed.

It is provided that a given city will receive cards with L as the third letter, the last number is zero and the penultimate is 1.

Then the general format of this cities credit cards is as follows:

<u>X</u> <u>X</u> <u>L</u> <u>#</u> <u>#</u> <u>1</u> <u>0</u>

Now there are two spaces left for letters and 2 for numbers.

As there are no repetition allowed the two letter spaces can be filled by:

Number of ways to select 2 letters = 25 × 24 = 600

And the number of ways to select two numbers when there is no repetition allowed is:

Number of ways to select 2 numbers = 8 × 7 = 56

Compute the total number credit cards available at the supermarket as follows:

Total number credit cards = 600 × 56 = 33600

Thus, the total number of distinct cards offered by such supermarket chain for that city is 33,600.

The correct option is (A).

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2 years ago
Y varies as t. if y = 6 when t= 4
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See attachment file below.

Hope it helped!!

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