3 years ago

Which og the following represents an equation? a. 3x+13-5 b. 3+11=14 c. x+14 d. x/5-2

Mathematics

1 answer:

jekas [21]3 years ago

3 0

B. 3+11=14 because it has an equal sign.
equation has the word equal so evrething with an equal sign is an equation

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If a political poll indicates that a 95% confidence interval for a presidential approval rating is between 47% and 57%, what is

jarptica [38.1K]

The answer is that the assumed margin of error is 5%.
Here is how we calculate this;
presidential approval rating is between 47% and 57%
(57% - 47% ) / 2 = 10/2 = 5%

7 0

3 years ago

Find the missing side. Round to the nearest tenth.

Firdavs [7]

Answer: 23.7

Step-by-step explanation:

Let's calculate the acute angle at the base of the triangle:

180° - 90° - 40° = 50°

Find side x:

$\dfrac{sin \: 90^{o} }{31} =\dfrac{sin \: 50^{o} }{x}\\\\sin \: 90^{o} \cdot x=sin \: 50^{o} \cdot 31\\\\sin \: 90^{o} =1\\sin \: 50^{o} \approx 0.766\\1 \cdot x =0.766 \cdot 31\\x=23.746\\23.746 \approx 23.7$