2 years ago

What is the value of the expression 9+4n-1 when n = 3?

1 answer:

6 0

Answer: 9+4n-1 = 20

We can solve this by substitution.
Replace n with the value given, 3 (remember 4n means 4 times n):
9 + 4*3 - 1
Then work it out using arithmetic
9+12-1
=20

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Find the percent of change. Original: 80, new: 64

lara31 [8.8K]

Hi there!

To find the percent of change we can use the following formula:
$\frac{new - old}{old} \times 100\%$

Let's fill in our data
$\frac{64 - 80}{80} \times 100\% =$

Subtract
$\frac{ - 16}{80} \times 100\% =$

Divide
$- 0.2 \times 100\%$

And finally multiply
$- 20\%$

Hence, the percent of change is negative 20%.
~ Hope this helps you!

3 0

3 years ago

HELP PLEASE ASAP I WILL MARK BRAINLIEST

prisoha [69]

Answer:

BC = 24

Step-by-step explanation:

FD = 36, FE = 15 and CD = 18

By secant theorem.

DE • DF = CD • DB

(36 - 15) • 36 = 18 • DB

DB = 42

BC = DB - CD

BC = 42 - 18

BC = 24

PLEASE MARK ME AS BRAINLIEST AND HAVE A NICE DAY :)

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2 years ago

Using the diagram, find sin B. Express your answer as a decimal rounded to the nearest hundredth, such as .86 or 0.86.

inessss [21]

Hi, thank you for posting your question here at Brainly.

This problem could be solved using the Law of Cosines, since we are given with the three sides. The equation goes,

b^2 = a^2 + c^2 - 2accosB. Substituting,

24^2 = 7^2 + 25^2 - 2(7)(25)cosB

Then B = 73.7 degrees. Therefore sinB or sin(73.7) = 0.96.

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3 years ago

Lateral surface area

ivann1987 [24]

The answer is going to be 181.121506177483. hope that helped

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3 years ago

Group of answer choices Phone A Phone B Phone C Phone D

Otrada [13]

Answer:

Phone B

Step-by-step explanation: