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3 years ago

Simplify. 1.25x+7−3x−4+x _ x + __

Mathematics

2 answers:

skad [1K]3 years ago

8 0

Answer:

Step-by-step explanation:

ta da, hope this is what you're looking for

pantera1 [17]3 years ago

5 0

Answer:

0.75x+3

Step-by-step explanation:

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Find the area. 5cm 3cm 4 cm

Ostrovityanka [42]

Answer:

6 cm²

Step-by-step explanation:

Since 3 side lengths are given, I assume that this figure is a triangle. The area of a triangle can be determined by using hero's formula.

$\text{Area of triangle} = \sqrt{\text{s(s - a)(s - b)(s - c)}$

⇒ s = Perimeter/2

⇒ a, b, and c = side lenths of triangle

Replacing a, b, and c as the given side lengths:

$\implies \text{Area of triangle} = \sqrt{\text{s(s - 5)(s - 3)(s - 4)}$

Determining the perimeter of the triangle:

$\text{Perimeter of triangle = Sum of it's side lengths}$

$\implies \text{Perimeter of triangle =}\ 5 + 4 + 3$

$\implies \text{Perimeter of triangle =}\ 12 \ \text{cm}$

Determining the half of perimeter:

$\text{Half of perimeter} = s = \dfrac{\text{Perimeter}}{2}$

$\implies s = \dfrac{12}{2}$

$\implies s = 6$

Replacing the value of "s" in the formula:

$\implies \text{Area of triangle} = \sqrt{\text{6(6 - 5)(6 - 3)(6 - 4)}$

Evaluating the area:

$\implies \text{Area of triangle} = \sqrt{\text{6(6 - 5)(6 - 3)(6 - 4)}$

$\implies \text{Area of triangle} = \sqrt{\text{6(1)(3)(2)}$

$\implies \text{Area of triangle} = \sqrt{\text{6(6)}$

$\implies \text{Area of triangle} = 6 \ \text{cm}^{2}$

6 0

2 years ago

Can someone help me plz?

mr_godi [17]

Answer:

60 degrees

Step-by-step explanation:

The total measures of a triangle should equal 180 total. Add the three known angles to get 120. Subtract that from 180 to get 60. So, the last angle measures 60 degrees.

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3 years ago

Which is a flat surface with no thickness that contains many lines and extends without end in the directions of all its lines?

Lina20 [59]

Answer: A plane

This needs to be 20 characters long so this is ok

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3 years ago

Which law of logic is used to make a conclusion?

avanturin [10]

Answer:

Step-by-step explanation:

Law of Quadrilaterals.

I think this is correct, how it helps.

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3 years ago

Simplify. 1.25x+7−3x−4+x _____ x + ______

Simplify. 1.25x+7−3x−4+x _ x + __