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Ksivusya [100]
3 years ago
7

PLEASE HELP! 25 POINTS AND BRANLIEST!!!!!! Find the sum of the series. Include each term that leads to the final sum and show th

e expression for finding that term.
The 5 is above the sigma, while the k=3 is below.
Please show work!
∑5 k=3(−2k+5)
Mathematics
1 answer:
Makovka662 [10]3 years ago
7 0

Answer:

I think the answer is -9?

Step-by-step explanation:

5

∑ -2k + 5

k=3

= [-2(3) + 5] + [-2(4) + 5] + [-2(5) + 5]

=      -1 + -3 + -5

 = -9

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Sasha has some pennies, nickels, and dimes in her pocket. The number of coins is 16. The expression 0.01p+0.05n+0.10d represents
uysha [10]
I would like to use cents

p+n+d=16
1p+5n+10d=122
twice as many nicklese a pennies, n=2p

sub 2p for n
p+2p+d=16
1p+5(2p)+10d=122
simplified
3p+d=16
1p+10p+10d=122

3p+d=16
11p+10d=122
now solve
use subsitution

3p+d=16
minus 3p from both sides
d=16-3p
sub 16-3p for d in other equation

11p+10(16-3p)=122
11p+160-30p=122
160-19p=122
minus 160 both sides
-19p=-38
divide both sides by -19
p=2

sub back
n=2p
n=2(2)
n=4

d=16-3p
d=16-3(2)
d=16-6
d=10


2 pennies
4 nickles
10 dimes


3 0
4 years ago
Administrators at a local high school are organizing desks in the cafeteria for the junior students to use while taking a practi
ICE Princess25 [194]

Answer:

correct choice is B

Step-by-step explanation:

If d represents the number of desks in each row and the administrators want there to be 13 less rows than the number d of desks in each row, then the number of rows is d-13.

The total number of desks in all rows is

d\cdot (d-13)=d^2-13d.

Due to space limitations, there should be fewer than 264 students in the cafeteria. Therefore,

d^2-13d

8 0
3 years ago
Compute z-score. Given ~ n(12,2.5),find z score when x =17
Anestetic [448]

Answer:

The desired z-score is 2.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

n(12,2.5)

This means that \mu = 12, \sigma = 2.5

z score when x =17

This is Z when X = 17. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{17 - 12}{2.5}

Z = 2

The desired z-score is 2.

3 0
3 years ago
Pleaseee helppppppp!!
marissa [1.9K]

Answer:

AED means the entire angle

I AEB is 29 degrees and BEC is 12 degrees, the 29+12=41 degrees.

x=89-41

x=48 degrees

hope it helps :)

8 0
3 years ago
Read 2 more answers
41) Gabriella invests $8,193 in a retirement
nataly862011 [7]

Answer:

Option C. \$34,252.67  

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=18\ years\\ P=\$8,193\\ r=0.08\\n=6  

substitute in the formula above  

A=\$8,193(1+\frac{0.08}{6})^{6*18}=\$34,252.67  

4 0
4 years ago
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