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yan [13]
3 years ago
6

Helen has only 10 questions left to do of her Math homework. She

Mathematics
2 answers:
bezimeni [28]3 years ago
4 0
Answer:

B. Start at 120 and subtract 5 each time. She will have 70 minutes of free time after she finishes her math questions
Yuliya22 [10]3 years ago
4 0
B, each question is 5 minutes, so it will take her 50 minutes for her to finish her homework and yu subtract that from 120 and she will have 70 minutes left.
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2.5 x 2.5 x 2.5 - 1.4 x 1.4 x 1.4<br>(2.5)2+ 2.5 X 1.4 + (1.4)2​
melomori [17]

Answer:

a) 2.5×2.5×2.5-1.4×1.4×1.4=12.881

b) (2.5)2+2.5×1.4+(1.4)2=31.5

Step-by-step explanation:

yuh multiple 2.5 three times and subtract 1.4 multiple three times. 2.5×2.5×2.5-1.4×1.4×1.4

15.625-2.744=12.881.

b) when opening bracket Yuh multiple the number in the bracket by the number outside the bracket. when bracket is open Yuh can now add, multiple to obtain your answer please

(2.5)2+2.5×1.4+(1.4)2

5+2.5×1.4+2.8

7.5×4.2=31.5

8 0
3 years ago
Test the convergence of the series sigma_n = 1^infinity n^n/n!
riadik2000 [5.3K]

With a_n=\frac{n^n}{n!}, we have

\dfrac{a_{n+1}}{a_n}=\dfrac{\frac{(n+1)^{n+1}}{(n+1)!}}{\frac{n^n}{n!}}=\dfrac{(n+1)n!}{(n+1)!}\left(\dfrac{n+1}n\right)^n=\left(1+\dfrac1n\right)^n

whose limit is (famously) e as n\to\infty. e>1, so the series diverges by the ratio test.

7 0
3 years ago
What is the surface area of 14cm 4cm and 6cm
daser333 [38]
The six sides would be:
2 sides of 14*4=56cm^2, 112 in total
2 sides of 4*6=24cm^2, 48 in total
2sides of 14*6=84cm^2, 168 in total
112+48+168=328cm^2
3 0
3 years ago
Is -1 a ZERO of the function f(x)=x^3-x^2-17x-15?
MaRussiya [10]

yeah it is.............

4 0
4 years ago
Point P'P
Dovator [93]

Answer:

The point P' is the image of the point P under the translation

The coordinates of the point P are (6,0)

We need to determine the coordinates of the point P'

Coordinates of the point P':

The coordinates of the point P' can be determined by substituting the coordinates of the point P(6,0) in the translation.

Thus, substituting the coordinates, we have;

Simplifying the coordinates, we get;

Thus, the coordinates of the point P' is (0,-1)

Step-by-step explanation:

1/4(6) + 3(7)

6/4 + 21

3/2 + 42/2

45/2= 22 1/2

4 0
4 years ago
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