All categories

3 years ago

Hey guys please answer if you know

Mathematics

2 answers:

jonny [76]3 years ago

6 0

Answer:

Step-by-step explanation:

note that

(a + b)² = a² + b² + 2ab , that is

a² + b² + 2ab = (a + b)² ← subtract 2ab from both sides

a² + b² = (a + b)² - 2ab

= 5² - 2(3)

= 25 - 6

= 19

Monica [59]3 years ago

3 0

Answer:

Step-by-step explanation:

since value of both a+b and a*b are given

formula for a^2 + b^2 is (a+b)^2-2*a*b

Substituting those value,

a^2+b^2=5^2-2*3

i.e. 25-6

=19

You might be interested in

For this set of data,<br> 89, 88, 84, 87, 89, 84, 84, 83, 85, 89, 84<br> Find the standard deviation

Ilia_Sergeevich [38]

Answer: 2.2962419891482

Step-by-step explanation: First get the mean of the numbers or the average

the mean in this case is 86

then subtract each number by the mean of 86

the numbers then become : 3, 2, -2, 1, 3, -2, -2, -3, -1, 3, -2

then square all the numbers to get : 9, 4, 4, 1, 9, 4, -4, 9, 1, 9, 4

then find the mean of those numbers which is 5.2727272727273

then find the square root of this number to find the standard deviation

2.2962419891482 is the standard deviation

hope this helps mark me brainliest if it helped

6 0

2 years ago

8. You are planning to use a ceramic tile design in your new bathroom. The tiles are blue-and-white equilateral triangles. You d

ira [324]

Step 1

Find the area of one equilateral triangle

Applying the law of sines

$Area=\frac{1}{2} *a*b*sin C$

in this problem

a=b=7 cm

C=60 degrees

$Area=\frac{1}{2} *7*7*sin 60$

$Area=\frac{1}{2} *49*\frac{\sqrt{3}}{2} \\ Area=49*\frac{\sqrt{3}}{4}$ cm²

Step 2

To calculate the area of the hexagon multiply the area of one equilateral triangle by $6$

$Area Hexagon=6*[49*\frac{\sqrt{3}}{4}] \\ Area Hexagon=73.5*\sqrt{3}$ cm²

therefore

the answer is the option

73.5 sqrt 3cm²

3 0

3 years ago

Read 2 more answers

What is the value of ?<br> 18 - (2 x ? ) = ? x 4

Dmitry_Shevchenko [17]

Answer:

?= 3

Step-by-step explanation:

let x = ？

18-2x=4x

6x=18x

x=3

6 0

3 years ago

Read 2 more answers

What is the rate of 13 inches of snow in 8 hours?

seraphim [82]

Answer: 1.625 inches of snow per hour

Step-by-step explanation:

13 divided by 8 is 1.625

6 0

2 years ago

Randy currently has a batting average of .388. What two fractions is this decimal between?

masya89 [10]

The answer is

$\frac{3}{8}$ and $\frac{5}{12}$

8 0

3 years ago

Read 2 more answers

Hey guys please answer if you know​

Hey guys please answer if you know