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STatiana [176]
3 years ago
14

Here’s the other one :)

Mathematics
2 answers:
Naddik [55]3 years ago
4 0

I believe the answer is 2(15t).

devlian [24]3 years ago
4 0

Answer:

15 x t hours x 2

Step-by-step explanation:

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Can someone please help me with 1 and 2 :)
raketka [301]

Answer:

1. {(2, 7), (1, 3), (0, -5), (-1, -2)}

2. {(1, -1), (-1, 0), (-3, -5), (-9, 2)}

Step-by-step explanation:

Inverse means finding the opposite so basically all you have to do is write the opposite of lets say -3 which is +3.

3 0
3 years ago
Divide £208 in the ratio 3:1<br><br> How do I do this??
inysia [295]

Answer:

s = r1 s = 3.1 s = 3.1

or

v =a/s

v = 208/3.1

v = 67.0968

Step-by-step explanation:

3 0
3 years ago
Evaluate <br> 4x3x8-2x(8x5-37)
Zigmanuir [339]

Answer:

4x^1^1-16x^6+74x

Step-by-step explanation:

7 0
3 years ago
4. Using the geometric sum formulas, evaluate each of the following sums and express your answer in Cartesian form.
nikitadnepr [17]

Answer:

\sum_{n=0}^9cos(\frac{\pi n}{2})=1

\sum_{k=0}^{N-1}e^{\frac{i2\pi kk}{2}}=0

\sum_{n=0}^\infty (\frac{1}{2})^n cos(\frac{\pi n}{2})=\frac{1}{2}

Step-by-step explanation:

\sum_{n=0}^9cos(\frac{\pi n}{2})=\frac{1}{2}(\sum_{n=0}^9 (e^{\frac{i\pi n}{2}}+ e^{\frac{i\pi n}{2}}))

=\frac{1}{2}(\frac{1-e^{\frac{10i\pi}{2}}}{1-e^{\frac{i\pi}{2}}}+\frac{1-e^{-\frac{10i\pi}{2}}}{1-e^{-\frac{i\pi}{2}}})

=\frac{1}{2}(\frac{1+1}{1-i}+\frac{1+1}{1+i})=1

2nd

\sum_{k=0}^{N-1}e^{\frac{i2\pi kk}{2}}=\frac{1-e^{\frac{i2\pi N}{N}}}{1-e^{\frac{i2\pi}{N}}}

=\frac{1-1}{1-e^{\frac{i2\pi}{N}}}=0

3th

\sum_{n=0}^\infty (\frac{1}{2})^n cos(\frac{\pi n}{2})==\frac{1}{2}(\sum_{n=0}^\infty ((\frac{e^{\frac{i\pi n}{2}}}{2})^n+ (\frac{e^{-\frac{i\pi n}{2}}}{2})^n))

=\frac{1}{2}(\frac{1-0}{1-i}+\frac{1-0}{1+i})=\frac{1}{2}

What we use?

We use that

e^{i\pi n}=cos(\pi n)+i sin(\pi n)

and

\sum_{n=0}^k r^k=\frac{1-r^{k+1}}{1-r}

6 0
3 years ago
Which number is equivalent to 7/8
PtichkaEL [24]

Answer:

78 is 7 divided by 8, which equals 0.875. So an equivalent fraction is another fraction that also equals 0.875.

6 0
3 years ago
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