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3 years ago

A = 5 b = 7 calculate the value of 3AB

Mathematics

2 answers:

mihalych1998 [28]3 years ago

7 0

Hey buddy I got your answer
Its 105

Kruka [31]3 years ago

6 0

Answer:

Step-by-step explanation:

$a = 5\\ b = 7 \\3ab = ?\\$

Plug in the given values for a and b into the equation ;

$3(5)(7)\\\\= 3(35)\\\\=105$

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MrRissso [65]

4
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7
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7
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2 years ago

What is the sum of the geometric series

lbvjy [14]

If $S$ denotes the sum of the first $n$ terms of a geometric series with first term $a$ and common ratio $r$ , then

$S=a+ar+ar^2+\cdots+ar^{n-3}+ar^{n-2}+ar^{n-1}$
$rS=ar+ar^2+ar^3+\cdots+ar^{n-2}+ar^{n-1}+ar^n$
$\implies S-rS=a+(ar-ar)+(ar^2-ar^2)+\cdots+(ar^{n-1}-ar^{n-1})-ar^n$
$\implies (1-r)S=a(1-r^n)$
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Using summation notation, you have

$S=\displaystyle\sum_{x=1}^nar^{x-1}=\sum_{x=0}^{n-1}ar^x=a\dfrac{1-r^n}{1-r}$

In this case, you have $a=2$ , $r=\dfrac12$ , and $n=16$ . So the value of the sum is

$\displaystyle\sum_{x=0}^{15}2\left(\frac14\right)^x=2\dfrac{1-\left(\frac14\right)^{16}}{1-\frac14}\approx2.67$

Rounded to the nearest whole number, the answer would be 3.

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3 years ago

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Answer:50212.5

Step-by-step explanation:

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2 years ago

Solve in(5x+7)=8 round to the nearest thousandth

Ivan

Answer:

$x=\frac{1}{5}$

$x=0.2$

Step-by-step explanation:

$(5x+7)=8$

$5x+7=8$

Subtract 7 from both sides.

$5x+7-7=8-7$

Simplify.

$5x=1$

Divide both sides by 5.

$\frac{5x}{5} =\frac{1}{5}$

Simplify.

$x=\frac{1}{5}$

Decimal form:

0.2

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3 years ago

A = 5 b = 7 calculate the value of 3AB​

A = 5 b = 7 calculate the value of 3AB