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2 years ago

Really need help, I’m trying to catch up in my math and get my marks back up before mid term..

Mathematics

2 answers:

Luba_88 [7]2 years ago

6 0

Answer:

a) 12x + 22 b) 17 $x^{2}$ - x

Step-by-step explanation:

Perimeter is the sum of the each side length.

The first example is a rectangle so the (4x+8) and the (2x+3) are doubled.

(4x+8) x 2 = 8x+16

(2x+3) x 2 = 4x + 6

12x+22

(6 $x^{2}$ - 12x) + (2 $x^{2}$ + x) + (9 $x^{2}$ + 10x)

combine like-terms.

17 $x^{2}$ - x

tensa zangetsu [6.8K]2 years ago

5 0

Answer:

12x + 22 for the rectangle, 17x^2 - x for the triangle

Step-by-step explanation:

The perimeter of a square/rectangle is equal to 2*width + 2*length

So for the rectangle, it would be 2*(4x + 8) + 2*(2x + 3)

This can be further simplified as 8x + 16 + 4x + 6

Which can be further simplified as 12x + 22

The perimeter of a triangle is equal to length if side one + length of side two + length of base

That would be (6x^2 - 12x) + (2x^2 + x) + (9x^2 + 10x)

Which becomes 8x^2 - 11x + (9x^2 + 10x)

17x^2 - x

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An isosceles right triangle has an area 8 cm square find the length of its hypotenuse

Ainat [17]

Answer:

5.9

Step-by-step explanation:

Area of a triangle is 1/2 base times height. the base is the horizontal part of the triangle and the height is the vertical part. Since it a isosceles they are equal. Those two segment are also called the legs (remember that for later). 4x4=16 times 1/2 equal 8 cm squared. So know me must find the hypotenuse. Since we since dealing with a right triangle we are going to use pythagorean theorem which is

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

where a and b are the LEGS and c is the hypotenuse. the legs are also known as base and height so we use

${4}^{2} + {4}^{2} = {c}^{2}$

which simplify to

$16 + 16 = {c}^{2}$

$32 = {c}^{2}$

$\sqrt{32}$

which is about 5.9

6 0

3 years ago

The difference of a number and 8 is the same as 34 less the number. find the number.

Dovator [93]

Let the number be x.

8 - x = x -34

2x = 8 + 34

2x = 42

x = 21

Answer: The number is 21.

4 0

3 years ago

For the following true conditional statement, write the converse. If the converse is also true, combine the statements as a bico

svetlana [45]

Well i think is better expressed if x^2=9.then x=3, that will be better expressed. Now the converse if clearly false, since if x^2<span>=9</span> it is possible that <span>x=−3. I hope this is useful for you</span>

8 0

3 years ago

SUBTRACT

antiseptic1488 [7]

Answer:

$-3x^{4} + 3{x}^{3} + 8{x}^{2}- 2x - 5$