2 years ago

HELPP PLEASEEEEEEE

Mathematics

1 answer:

Alexxx [7]2 years ago

7 0

A, c, and d
plug in each x in the equation and it should equal the y value

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Evaluate, and round your answer to the nearest hundredth.

VashaNatasha [74]

Answer:

(d) -1.83

Step-by-step explanation:

The explicit expression for the sum is ...

S = (-11/5)×(1 -(-1/5)^10)/(1 -(-1/5)) = -2.2(1 -1.024×10^-7)/1.2

S = -1.8333331456

The sum is approximately -1.83.

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<em>Additional comment</em>

For a sum of a sequence with multiplier 'a' and common ratio r, we find ...

$\displaystyle S=\sum_{n=1}^{10}ar^n=ar+ar^2+ar^3+\dots+ar^{10}\\\\rS=ar^2+ar^3+\dots+ar^{10}+ar^{11}\\\\S-rS=ar+(ar^2-ar^2)+(ar^3-ar^3)+\dots+(ar^{10}-ar^{10})-ar^{11}\\\\S=\dfrac{ar-ar^{11}}{1-r}=ar\dfrac{1-r^{10}}{1-r}$

A calculator or spreadsheet can also find the sum for you.

7 0

2 years ago

2x - y = 10

Zolol [24]

You can plug -x - 1 for y in the first equation

2x - (-x - 1) = 10

2x + x + 1 = 10

Combine

3x = 9

Divide

x = 3

Plug 3 for x in any equation ( I'll use th second equation )

y = - (3) - 1

y = - 3 - 1 = -4

x = 3 ; y = -4

(3, -4)

7 0

3 years ago

Read 2 more answers

And really likes cake. She desires that serving should be 3/5 of a cake. She has 4 cakes. How many servings does she have?

DENIUS [597]

2 2/5 servings of cake
www.mathpapa.com algebra calculator, it is good

6 0

3 years ago

Choose the number that has a 5 with a value 10 times less than the value of the 5 in the number in 54,271

Zigmanuir [339]

The answer is 500,000 because you have add a zero sense it's times 10

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