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3 years ago

Please help. I need a good step by step explanation

Mathematics

1 answer:

sasho [114]3 years ago

5 0

Answer:

the perimeter of a square is 4a.. where (a) is one side

therefore the equation formed is

3.5x(4)=2x+54

14=2x+54

2x= -40

x= -20

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Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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Which inequality is true?<br> 2/5<7/12<br> 2/3<1/8<br> 1/4>7/10<br> 3/10>5/8

mr_godi [17]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Find the exact values of the following,giving your answers as fractions

Vsevolod [243]

Answer:

(a) $3^{-2}=\frac{1}{9}$

(b) $4^{-3}=\frac{1}{64}$

Step-by-step explanation:

To find the exact value in fractions of the followings:

Exponents also called powers its a way of expressing a number multiplied by itself by a certain number of times.

Using $a^{-m}= \frac{1}{a^m}$ .......[1]

(a)

Fraction represents a part of a whole or more generally, any number of equal parts.

$3^{-2}$ = $\frac{1}{3^2}=\frac{1}{3\times 3}=\frac{1}{9}$ [ Using [1]]

(b)

$4^{-3}$ = $\frac{1}{4^3} =\frac{1}{4\times 4\times 4}=\frac{1}{64}$ [ Using [1]]

(c)

$2^{-6}$ = $\frac{1}{2^6} =\frac{1}{2\times 2\times 2\times 2\times 2\times 2}=\frac{1}{64}$ [ Using [1]]

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3 years ago

An investment of $450 increases at a rate of 6.5% per year. what is the growth factor, b?

Lera25 [3.4K]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$450\\ r=rate\to 6.5\%\to \frac{6.5}{100}\dotfill &0.065\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{per year, thus once} \end{array}\dotfill &1\\ t=years \end{cases}$

$\bf A=450\left(1+\frac{0.065}{1}\right)^{1\cdot t}\implies \underset{\textit{growth factor}}{A=450(\underset{\uparrow }{1.065})^t}$

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4 years ago