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Sholpan [36]
3 years ago
8

3/10+2 1/10+5 1/10 I need help

Mathematics
1 answer:
forsale [732]3 years ago
7 0
The answer is 7.5for the question
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3. If Jeff is walking 2 miles per hour (mph), how far can he travel in 1 hour?
Ipatiy [6.2K]
Jeff can travel 2 miles in one hour
4 0
3 years ago
How to find the square root of complex numbers?? Find the square root of (6+8i) ??​
ivann1987 [24]

Answer:

2 \sqrt{2}  + i \sqrt{2}

Step-by-step explanation:

The square of a complex number is a complex number. Here, we have:

{(a + bi)}^{2}  = 6 + 8i

{a}^{2}  + 2abi -  {b}^{2}  = 6  + 8i

We then have this system of equations:

{a}^{2}  -  {b}^{2}  = 6

2ab = 8

Solving this system:

ab = 4

b =  \frac{4}{a}

{a}^{2}  -  {( \frac{4}{a}) }^{2} = 6

{a}^{2}  -  \frac{16}{ {a}^{2} } = 6

{a}^{4}  - 16 =  6{a}^{2}

{a}^{4}  - 6 {a}^{2}  - 16 = 0

( {a}^{2}  - 8)( {a}^{2}  + 2) = 0

{a}^{2}   = 8

a = 2 \sqrt{2}

b =  \frac{4}{2 \sqrt{2} } =  \sqrt{2}

6 0
2 years ago
Read 2 more answers
If sec x = -2 and x is an angle in the second quadrant find tangent
faltersainse [42]

Answer:

ndnvndvkfnvnvndnvnvncxncnnc

Step-by-step explanation:

ndkkvdjv jnfbfbfnbfnvnfncnncvnfnfc

6 0
3 years ago
The coefficient of x^ky^n-k in the expansion of (x+y)^n equals (nk). True or false.
AVprozaik [17]

Answer:

The correct option is;

False

Step-by-step explanation:

The coefficient of x^k·y^(n-k) is nk,   False

The kth coefficient of the binomial expansion, (x + y)ⁿ is  \dbinom{n}{k} = \dfrac{n!}{k!\cdot (n-k)!} = C(n,k)

Where;

k = r - 1

r = The term in the series

For an example the expansion of (x + y)⁵, we have;

(x + y)⁵ = x⁵ + 5·x⁴·y + 10·x³·y² + 10·x²·y³ + 5·x·y⁴ + y⁵

The third term, (k = 3) coefficient is 10 while n×k = 3×5 = 15

Therefore, the coefficient of x^k·y^(n-k) for the expansion  (x + y)ⁿ = C(n,k) not nk

7 0
3 years ago
What is 3+5+7+8+2<br> i am only giving the brainliest answer if you respond in 5 seconds
Dmitrij [34]

Answer:

25

Step-by-step explanation:

I added them

4 0
3 years ago
Read 2 more answers
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