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Anna11 [10]
3 years ago
8

(7x + y)2 – 36(3x + 2y)2

Mathematics
2 answers:
forsale [732]3 years ago
6 0

Answer:

i think the answer is 146y-202x

tester [92]3 years ago
4 0

Answer:

−202x+−142y

Step-by-step explanation:

step one:distribute

(7x)(2)+(y)(2)+−216x+−144y

14x+2y+−216x+−144y

step two:combine like terms

14x+2y+−216x+−144y

(14x+−216x)+(2y+−144y)

=−202x+−142y

plz mark me brainliest

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Roberto debe leer un libro que contiene 340 páginas en 4 días por lo cual planea la siguiente distribución: el primer día 1/5 de
Finger [1]

Answer:

170 pages

Step-by-step explanation:

Roberto must read a book that contains 340 pages in 4 days for which he plans the following distribution

The number of pages he read for the first day :

The first day 1/5 of the pages of the book

This is calculated as:

1/5 × 340 pages

= 68 pages

For the second day:

The second 1/4 of what remains to be read

The number of pages remaining after the first day is calculated as:

340 - 68 = 272 pages

Hence, the number of pages read on the second day is

1/4 × 272 pages

= 68 pages

For the third day

One the third day, 1/6 of the rest was read.

The number of pages remaining after the first day is calculated as:

272 - 68 = 204 pages

Hence, the number of pages read on the third day is

1/6 × 204 pages

= 34 pages

Therefore, the number of pages Roberto has to read on the fourth day is calculated as:

340 pages - (68 + 68 + 34)pages

340 pages - 170 pages

= 170 pages

7 0
3 years ago
Help me please ! (: (6th grade)
mihalych1998 [28]

Answer:

$64.99

Step-by-step explanation:

A total of $584.91 was spent among 9 people (Caleb + 8 friends), thus we can find the amount per person. 584.91  \text{ dollars}/9\text{ people} = 64.99 \text{ dollars}/\text{person}

7 0
3 years ago
Ann is riding her bicycle. she takes 6 hours to ride 38.4 kilometers. what is her speed?
nikklg [1K]
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speed = 38.4 / 6 = 6.4 km per hr
5 0
3 years ago
Find the value of x that makes this equation true, just write a number for your answer. Use / for writing fractions
Tcecarenko [31]

Answer:

1/15

Step-by-step explanation:

The first thing to do is to change both denominators so that they're the same. In this case, that would be 15.

Then, whatever you do to the denominator, you must also do to the numerator.

\frac{9}{15} + x = \frac{10}{15}

X = 1/15

6 0
4 years ago
Read 2 more answers
What is the value of the expression (-8/9) + (-2/3) x (-4 1/2)
geniusboy [140]

\frac{4}{9}

I hope this this is what you need ..

6 0
3 years ago
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