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Viefleur [7K]
3 years ago
5

Select the sum of the series. ∑4k=1k2

Mathematics
1 answer:
SashulF [63]3 years ago
7 0
File under /hs. c= file remove. cmx.html. please refile.
You might be interested in
The perimeter of a rectangle is 400 yards what are the dimensions of the rectangle if the length is 40 yards more than the with
zloy xaker [14]
P = 2(L + W)
P = 400
L = W + 40

400 = 2(W + 40 + W)
400 = 2(2W + 40)
400 = 4W + 80
400 - 80 = 4W
320 = 4W
320/4 = W
80 = W.....so the width (W) = 80 yards

L = W + 40
L = 80 + 40
L = 120...and the length (L) = 120 yards
7 0
3 years ago
A bowl contained 49.7 grams of salt. Then, Charlie poured in another 41.14 grams. How much salt does the bowl contain now?
professor190 [17]

Answer:

90.84

Step-by-step explanation:

49.7+41.14= 90.84

6 0
3 years ago
Within 11 years, the age of Peter will be half the square of the age he was 13 years ago. Calculate the current age of Peter. Re
OLga [1]

Answer:

21

ctto JBarnum

Step-by-step explanation:

P+11=(1/2)(P-13)^2

P+11=(1/2)(P^2-26p+169)

2(P+11)=(1/2)(2)(P^2-26p+169)

2P+22=P^2-26p+169

0=P^2-28p+147      ( -7 and -21)

(P-7)(P-21)=0

P=7,21                     (cant be 7 as 13 years from 7 is negative so peter is 21)

checking:

21+11=32

32=(1/2)(21-13)^2

32=(1/2)(8)^2

32=(1/2)64

32=32

correct

4 0
3 years ago
Let f(w) = 2w^3 - 5. What is f(4)?
ZanzabumX [31]
F(4) = 2(4)^3 -5
= 2(64) -5

= 128-5
= 123

Hope this helps!
3 0
3 years ago
Read 2 more answers
Jean bought 4 2 3 yards of fabric. How much is this in feet?
Misha Larkins [42]

Here we have to convert 423 yards into feet.

first let us find the basic relation between yard and feet

1 yard =3 foot

so applying this to our question we get,

423 yard =423*3 foot = 1269 feet

Answer 423 yards =1269 feet

7 0
3 years ago
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