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eduard
3 years ago
13

Evaluate 12 sigma n=3 -5n-1 −410 −385 385 410

Mathematics
1 answer:
STatiana [176]3 years ago
3 0
Hope this would help you

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150 less than k is 39
d1i1m1o1n [39]

Answer:

your answer is 121

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Can you guys help me with this? Pls, Okay anyways.. Its a math problem! To make a Fruit salad, Chris bought 3 pounds of strawber
Nezavi [6.7K]

Answer:

$33.81

Step-by-step explanation:

(3 * 2.49) + (2 * 3.19) + (4 * 4.99)

7.47 + 6.38 + 19.96 = 33.81

Please mark brainliest if you like

8 0
2 years ago
Consider the differential equationy′′+3y′−10y=0.(a) Find the general solution to this differential equation.(b) Now solve the in
RSB [31]

Answer:

Y= 2e^(5t)

Step-by-step explanation:

Taking Laplace of the given differential equation:

s^2+3s-10=0

s^2+5s-2s-10=0

s(s+5)-2(s+5) =0

(s-2) (s+5) =0

s=2, s=-5

Hence, the general solution will be:

Y=Ae^(-2t)+ Be^(5t)………………………………(D)

Put t = 0 in equation (D)

Y (0) =A+B

2 =A+B……………………………………… (i)

Now take derivative of (D) with respect to "t", we get:

Y=-2Ae^(-2t)+5Be^(5t)   ....................... (E)

Put t = 0 in equation (E) we get:

Y’ (0) = -2A+5B

10  = -2A+5B ……………………………………(ii)

2(i) + (ii) =>

2A+2B=4 .....................(iii)

-2A+5B=10 .................(iv)

Solving (iii) and (iv)

7B=14

B=2

Now put B=2 in (i)

A=2-2

A=0

By putting the values of A and B in equation (D)

Y= 2e^(5t)

6 0
3 years ago
What is the length of line PS
stiks02 [169]
PQ^2 = PR \times PS

(4x + 4)^2 = (3x + 3)(3x + 3 + 21)

16x^2 + 32x + 16= (3x + 3)(3x + 24)

16x^2 + 32x + 16= 9x^2 + 81x + 72

7x^2 - 49x- 56 = 0

7(x^2 - 7x - 8)= 0

(x - 8)(x + 1) = 0

x - 8 = 0~~~or~~~x + 1 = 0

x = 8~~~or~~~x = -1

x = -1 makes the lengths of segments PQ and PR equal zero.
That is not possible, so the solution x = -1 is discarded.

x = 8

PS = 3x + 3 + 21

PS = 3x + 24

PS = 3(8) + 24

PS = 24 + 24

PS = 48
4 0
3 years ago
What times 6 equals 120
Gnoma [55]

20 beacause 120 divided by 6 equals 20 so 60x20=120

7 0
3 years ago
Read 2 more answers
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