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2 years ago

Error analysis Ella wrote AB

Mathematics

1 answer:

algol132 years ago

7 0

??????????????????? bro i dont understand

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4x - 3 - 3x = 12 + 2х

Aloiza [94]

My work for your question

5 0

3 years ago

Need Help!...anyone!

faust18 [17]

(a)

$\sqrt[5]{ {x}^{3} }$

(b)

$\sqrt[8]{x}$

(c)

$\sqrt[3]{ {x}^{5} }$

(d)

$\sqrt{ {x}^{3} }$

4 0

3 years ago

An electric company has to track on-time payments and late payments for each customer monthly. It is impossible for a customer t

OLga [1]

Answer:

The probability that a customer pays late each month is P(B) = 0.27

Step-by-step explanation:

Let P( A ) be the probability that the customer pays on time and the value is 0.55

Let P( B ) be the probability that a customer pays late each month

The probability that a customer pays late or on-time each month is P(A u B) and the value is 0.82

The probability that a customer pays on-time and late each month is P(A n B) and the value is zero ( 0 ) given that it is impossible

Now The probability that a customer pays late or on-time each month is mathematically represented as

P(A u B) = P(A) + P(B) - P(A n B)

=> 0.82 = 0.55 + P( B ) - 0

=> P(B) = 0.27

8 0

3 years ago

Use the formula to evaluate the series -3+6-12+24-...-a7

vichka [17]

-3+6-12+24 <---- notice the terms firstly, they go as

-3 , +6 , -12 , +24 ,.... <---- to get the next term's value, you multiply it by -2

thus, is a geometric sequence, and -2 is the "common difference", and the first term is -3 of course.

so... what's the sum of the first 7 terms?

 $\bf \qquad \qquad \textit{sum of a finite geometric sequence}\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=-3\\
r=-2\\
n=7
\end{cases}$

 $\bf S_7=\sum\limits_{i=1}^{7}\ -3\cdot (-2)^{i-1}\implies 
S_7=-3\left( \cfrac{1-(-2)^7}{1-(-2)} \right)
\\\\\\
S_7=-3\left( \cfrac{1-(-128)}{1+2}\right)\implies S_7=-3\left( \cfrac{129}{3} \right)\implies S_7=-3(43)
\\\\\\
S_7=-129$

8 0

4 years ago

Ayana bought a container of peanuts. She gave 1/4 of it to one sister,1/3 to another sister, and she kept the rest for herself.

mina [271]

Gotta find the LCM so between 3 and 4 it is 12. so 3/12 and 4/12 total it would be 7/12. may not help if it doesn't sorry it it does cool. remember to rebel against favoritism at home and school :)

4 0

4 years ago