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3 years ago

The only solution of the equation x^2 + bx + 16 = 0 is x = 4. What is the value of b?

Mathematics

1 answer:

jeka943 years ago

8 0

Answer:

yes beacajdkdnjdhdhds

Step-by-step explanation:

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What is the perimeter, in units of a polygon with vertices located at (-7, -3), (-7, 4) , (6, -3), and (6, 4)?

marshall27 [118]

Answer:

40 units

Step-by-step explanation:

-7 to 6 is 13 units and -3 to 4 is 7 units, it asks for perimeter so 13 x 2 + 7 × 2

4 0

2 years ago

How to solve 2 2/6 +4 3/6

exis [7]

Answer: " $6 \frac{5}{6}$ ".

Step-by-step explanation:

______________________________________

$2 \frac{2}{6} + 4\frac{3}{6} = 2 + 4 + \frac{2}{6} + \frac{3}{6}$ ;

$= 6 + \frac{2}{6} + \frac{3}{6}$ ;

______________________________________

→ $\frac{2}{6}+\frac{3}{6} = \frac{(2+3)}{6} = \frac{5}{6}$ ;

→ $6 +\frac{2}{6}+ \frac{3}{6} = 6 + \frac{(2+3)}{6} = 6 \frac{5}{6}$ .

______________________________________

→ The answer is: " $6 \frac{5}{6}$ ".

_______________________________________

8 0

3 years ago

Read 2 more answers

A 12-sided die is rolled. The set of equally likely outcomes is {1,2,3,4,5,6,7,8,9,10,11,12}. Find the probability of rolling

vredina [299]

Since there is only 2 numbers smaller than 3 on the die it would be 2 out of 12

4 0

3 years ago

zubka84 [21]

Answer:

See Explanation Below

Step-by-step explanation:

Given

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx.cos x.$

Required

Prove

To start with; we open the bracket on the left hand side

$(sin x - cos x)^2 = (sin x - cos x)(sin x - cos x)$

$(sin x - cos x)^2 = (sin x )(sin x - cos x)- (cos x)(sin x - cos x)$

$(sin x - cos x)^2 = sin^2 x -sinx cos x - sin xcos x + cos^2 x$

$(sin x - cos x)^2 = sin^2 x -2sinx cos x + cos^2 x$

Reorder

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

From trigonometry;

$sin^2x + cos^2x = 1$

So;

$(sin x - cos x)^2 = sin^2 x + cos^2 x - 2sinx cos x$

becomes

$(sin x - cos x)^2 = 1 - 2sinx cos x$

Also from trigonometry;

$sec^2x - tan^2x = 1$

So,

$(sin x - cos x)^2 = 1 - 2sinx cos x$

becomes

$(sin x - cos x)^2 = sec^2x - tan^2x - 2sinx cos x$

Proved

3 0

3 years ago

6 b 2 a 6 same result

Luba_88 [7]

Answer:

go to this link

Step-by-step explanation:

Videos

2:41

Manipulating expressions using structure (example 2) (video)

8 0

3 years ago