3 years ago

PLEASE ANSWERRRRRRRRRR

Mathematics

2 answers:

Alecsey [184]3 years ago

7 0

Answer:

True

Step-by-step explanation:

Semenov [28]3 years ago

6 0

Answer: True

Step-by-step explanation:

In electromagnetic waves, the more the work, the greater the energy expended.

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Which word sentence represents the equation?

sashaice [31]

I think the answer is )Fifteen less than 2 times some number is 9

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6 0

3 years ago

Read 2 more answers

Please help explanation if possible

hram777 [196]

Answer:

y = 1/7x + 0

Step-by-step explanation:

3x + 21y = 21

21y = -3x + 21

y = -3/21x

y = 1/7x

3 0

3 years ago

The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).

lesantik [10]

Answer:

(a).

$S_{n} = \frac{n}{2} (4n + 20) \\ \\S _{n - 1} = \frac{(n - 1)}{2} (4n - 4 + 20) \\ \\ S _{n - 1} = \frac{(n - 1)}{2} (4n + 16) \\ \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2} \\ \\ { \boxed{S _{n - 1} = {2 {n}^{2} + 6n - 8}}} \\$

(b).

from general equation:

$S _{n - 1} = \frac{(n - 1)}{2} (4n + 16)$

first term is 4n

common difference:

$16 = \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d = \frac{16}{n - 2}$

8 0

3 years ago

Mallorie has $5 in her wallet.if this is 10% of her monthly allowance what is her monthly allowance

marta [7]

5=.1*x
divide both side by .1
5/.1=x
x=50 dollars

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3 years ago

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Emma earns $12 an hour babysitting. She wants to save at least $180. Write and solve and inequality to find the minimum number o

zaharov [31]

Answer:

15 hours

Step-by-step explanation:

180 ÷ 12 = 15

^-^

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3 years ago