3 years ago

Pleaseeeeeeeeeee help :)

Mathematics

1 answer:

Vikentia [17]3 years ago

4 0

Answer:

12: 21 16:28

Step-by-step explanation:

4 pounds are equal to 7 packs. 4x3=12, and 7x3=21, and so on.

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Topic: Finite Geometric Sums <br> what is the value of ..

kobusy [5.1K]

$\bf \sum\limits_{i=a_1}^{a_n}\ a1\cdot (r)^{n-1}\iff S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\qquad 
\begin{cases}
a_1=\textit{first term}\\
r=\textit{common ratio}\\
n=n^{th}\ term
\end{cases}\\\\
-----------------------------\\\\

\begin{array}{llll}
\sum\limits_{i=1}^{3}\ &4\cdot \left( \frac{1}{2} \right)^{i-1}\\
&\uparrow \quad \uparrow \\
&a_1\quad r
\end{array}\iff S_3=4\left( \cfrac{1-\left( \frac{1}{2} \right)^3}{1-\left( \frac{1}{2} \right)} \right)$

7 0

3 years ago

If Martha and Howard are 5 hours into the marathon, how far has<br> each person run?

lubasha [3.4K]

Not enough context, you would need a speed or velocity, you can’t tell distance with only time.

8 0

3 years ago

When twice a number is subtracted from 29 the result is 21 find the number

Gre4nikov [31]

X= a number

29 - 2x= 21
subtract 29 from both sides
-2x= -8
divide both sides by -2
x= 4

CHECK:
29 - 2x= 21
29 - 2(4)= 21
29 - 8= 21
21= 21

ANSWER: The number is 4.

Hope this helps! :)

4 0

3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST

Montano1993 [528]

Answer: The correct answer is C

-1/4r+6p

Step-by-step explanation:

7 0

3 years ago

Which of the following fractions would convert to a repeating decimal 7/8 or 3/5 or 5/2 or 2/9

Mashcka [7]

Answer:

2/9

Step-by-step explanation:

7/8=0.875

3/5=.6

5/2=2.5

2/9=0.22222222222...

6 0

3 years ago