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kumpel [21]
3 years ago
6

Combining like terms with negative coefficients

Mathematics
1 answer:
den301095 [7]3 years ago
8 0

Answer:

you add them, but keep the sign

Step-by-step explanation:

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Which expression is equivalent to (3b 2r) (4b r)? 7b 2r 7b 3r 12b 2r 12b 3r.
Maslowich

To add the variables, add the coefficients with same variable. The expression which is equivalent to given expression is 7b+3r. The option 2 is the correct option.

<h3>What is equivalent expression?</h3>

Equivalent expression are the expression whose result is equal to the original expression, but the way of representation is different.

Given information-

The expression given in the problem is,

(3b+2r)+(4b+r)

Let the resultant expression of the above expression is x. thus,

x=(3b+2r)+(4b+r)

To add the algebraic terms open the brackets first,

x=3b+2r+4b+r

Separate the same variable terms,

x=3b+4b+2r+r

To add the variables, add the coefficients with same variable. Thus,

x=7b+3r

Hence, the expression which is equivalent to given expression is 7b+3r. The option 2 is the correct option.

Learn more about the equivalent expression here;

brainly.com/question/2972832

4 0
3 years ago
Cynthia invests some money in a bank which pays 5% compound interest per year. She wants it to be worth over £8000 at the end of
Agata [3.3K]

\bf \qquad \textit{Compound Interest Earned Amount}\\\\A=P\left(1+\frac{r}{n}\right)^{nt}\quad \begin{cases}A=\textit{accumulated amount}\to &8000\\P=\textit{original amount deposited}\\r=rate\to 5\%\to \frac{5}{100}\to &0.05\\n=\begin{array}{llll}\textit{times it compounds per year}\\\textit{is only once, so}\end{array}\to &1\\t=years\to &3\end{cases}

\bf 8000=P\left(1+\frac{0.05}{1}\right)^{1\cdot 3}\implies 8000=P(1.05)^3\implies \cfrac{8000}{1.05^3}=P\\\\\\6910.70\approx P\implies  \stackrel{\textit{rounded up}}{6911 = P}\qquad  therefore\qquad 6911~~\leqslant ~~P

6 0
3 years ago
X is a 2 digit whole number how many digits does the number 10 x
marta [7]

Answer:

3

Step-by-step explanation:

Lets take 45 as an example, 10(45) = 450

450 is a 3 digit

6 0
3 years ago
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In 1993 president Clinton received an average of 25,000 letters per day if an average month has 30 days how many letters did he
sergey [27]

Answer:

he received about 750,000 letters a month.

Step-by-step explanation:

multiply the letters received per day=25,000

by the number of days in the month=30

so: 25,000 × 30= about 750,000 letters

3 0
3 years ago
The cruising speed of a boeing 747 is 250 m/s. at this rate what distance does it travel in one minute?
Tems11 [23]
250m/s = x m/min
250m/s = x min/ 60s
250•60 = 1500
The airplane will travel 1500m per minute
7 0
4 years ago
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