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Maru [420]
3 years ago
15

Double a number is equal to the number decreased by five. Find the number. A) -10 B) -5 C) 5 D) 10

Mathematics
2 answers:
sweet-ann [11.9K]3 years ago
4 0
The answers be because it says DECREASED by 5 so it would be -5
dexar [7]3 years ago
3 0

Answer:

Option b) -5

Step-by-step explanation:

We are given the following information in the question:

Twice of a number is equal to number decreased by five.

Let the number be x. Then, this can be written in the form of equation:

2\times x = x-5

Solving the above equation:

2\times x = x-5\\2x-x = -5\\x = -5

Hence, the number is x = -5.

The correct answer is given by the option b) -5.

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The formula a=46c gives the floor area (a) in square meters that can be wired using (c) circuits
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6 0
3 years ago
The area of the triangle is 22.4cm^2.
Ivanshal [37]

Answer:

The longest side length b is approximately 13.172 cm

Step-by-step explanation:

The given parameters are;

The area of the triangle = 22.4 cm²

The given angles of the triangle = ∠97°

The given side of the triangle = 3.7 cm

The formula for the area of a triangle, A = 1/2 × a × b × sin(C)

Where;

a, and b are the side legs forming the angle C

Therefore,  we have;

A = 22.4 = 1/2 × 3.7 × a × sin(97°)

a =  22.4/(1/2 × 3.7 × sin(97°)) ≈ 12.199

a ≈ 12.199 cm

Therefore, by cosine rule, we have;

b² = a² + c² - 2 × a × c × Cos(B)

Substituting the values, gives;

b² = 12.199² + 3.7² - 2 × 12.199 × 3.7 × Cos(97°)

b² ≈ 173.507

∴ b ≈ √173.507 ≈ 13.172

b ≈ 13.172 cm

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