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3 years ago

PLEASE HELP MEEEEE!! WILL MARK BRAINLIST!!

Mathematics

1 answer:

Lynna [10]3 years ago

6 0

I believe the answer is D, I’m almost 100% positive this is correct

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Use the following image to assist in your answer. a = - 6 - 9 - 4

vfiekz [6]

Step-by-step explanation:

Pythagoras' theorem for the smallest one :

$c^2 = 4^2 + 6^2$

$c^2 = 16 + 36$

$c^{2}$ = 52

Pythagoras' theorem for the middle one :

$b^{2}$ = $6^{2}$ + $a^{2}$

Pythagoras' theorem for the biggest one :

$(4+a)^2 = c^2 + b^2$

$16 + 8a + a^2 = 52 + b^2$

Using the formula before (for $b^2$ ) it becomes :

$16 + 8a + a^2 = 52 + (6^2 + a^2)$

$16 + 8a + a^2 = 52 + 6^2 + a^2$

$16 + 8a = 52 + 6^2$

16 + 8a = 52 + 36

16+8a = 88

8a = 88-16

8a = 72

$a = \frac{72}{8}$

a = 9

Verifying :

$b^2 = 6^2 + a^2$

$b^2 = 36 + 81$

$b^2 = 117$

$b^{2}$ = 117

The biggest one :

$(4+a)^2 = c^2 + b^2$

$(4+9)^2 = 52 + 117$

$13^2 = 169$

True

8 0

2 years ago

Solve and check please please help i will mark u as a brill it is easy please

Lesechka [4]

Answer:

B=25

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

What is the measurement of this angle

mafiozo [28]

Answer:

28°

Step-by-step explanation:

62° + 90° = 152°

180° - 152° = 28°

Stay safe and have a wonderful day! Peace!✌

6 0

3 years ago

Read 2 more answers

The variance of a stock's returns can be calculated as the:

Tamiku [17]

Answer:

The correct option is b.

Step-by-step explanation:

The formula for standard deviation is

$\sigma^2=\frac{\sum {(x-\overline{x})^2}}{n}$

where, $\overline{x}$ is mean of the data and n is number of observation.

The variance of a stock's returns can be calculated by the above formula.

Variance of stock's returns is the average value of squared deviations from the mean.

Therefore the correct option is b.

4 0

3 years ago

1 x 10^7 x 2 x 10^6 is

fomenos

Answer:

2e+13

Step-by-step explanation:

7 0

2 years ago