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egoroff_w [7]
2 years ago
6

Please help I’ll give brainlyist

Mathematics
2 answers:
lakkis [162]2 years ago
6 0

Answer:

The second choice

Step-by-step explanation:

kati45 [8]2 years ago
3 0

Answer:

+ 6x^{2} and -10y^{2}

Step-by-step explanation:

3x^{2} + 5y^{2} {} + 3 {} + 4y^{2} + 6 = 9x^{2} - y^{2}+ 9

3x^{2} + 9y^{2} {} + 9 {}  = 9x^{2} -  y^{2}+ 9

+ 6x^{2}    -10y^{2}

3x^{2} + 9y^{2} + 6x^{2} + 9 - 10y^{2} = 9x^{2} - y^{2}+ 9

9x^{2} - y^{2}+ 9 = 9x^{2} - y^{2}+ 9

You might be interested in
daren has 10 sweets .hellen has 30 sweets.faith has 4 fewer sweets than the average number of sweets daren,hellenand faith have.
Sunny_sXe [5.5K]

Answer:

16

Step-by-step explanation:

Average = the sum of all numbers divided by the amount of items in the set, so:

10+30=40

40/2=20

20-4=16

Hopefully this helps :) Good luck!

8 0
3 years ago
The area of a rectangle is 108 m2 and its diagonal is 15 m. Find
Andre45 [30]

Answer:

47.6m.

Step by step solution:

Perimeter of a triangle = base + 2 . length____(1)

Area of a triangle = 1/2 . base . diagonal

108 = 1/2 . base . 15

multiplying both sides by 2:

216 = 15 . base

dividing both sides by 15:

base = 14.4m

But the diagonal divides the triangle into two

right angle triangles each with the same length (hypotenuse),base and diagonal(height).

Taking one right angle triangle:

And using pythagoras theorem;

length² = base² + diagonal ²

length² = 7.2² + 15²

Note: Base of each right angle triangle is 7.2 which would sum up to be 14.4 the base of the full triangle.

length² = 276.84

taking the square root of both sides:

length = 16.6m

Putting the values of the base and length into equation (1).

Perimeter of the triangle = 14.4 + 2 . 16.6

Note: We are dealing with the whole triangle

now hence the base is 14.4m.

Perimeter of the triangle = 14.4 + 33.2 = 47.6m.

6 0
3 years ago
Read 2 more answers
I'll mark brainliest thanks in advance ​
dezoksy [38]

Answer:

x = 2

Step-by-step explanation:

These are known as alternate exterior angles. These types of angles are equal to each other.

8x-7=2x+5\\6x-7=5\\6x=12\\x=2

8 0
2 years ago
A scientist measured the growth rate of a bamboo plant at 6 inches in 12 hours. She compared the growth rate of a bamboo plant t
Arturiano [62]

Answer:

Answer Picture:

Step-by-step explanation:

4 0
3 years ago
Anyone good in Geometry
Dominik [7]

Answer:

10

Step-by-step explanation:

6x = 60

4 0
3 years ago
Read 2 more answers
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