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3 years ago

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In 2 years, I will be twice as old as I was 5 years ago. My little brother is 3 years younger than I am. Our baby sister is 2 ye

ars younger than he is.

1 answer:

beks73 [17]3 years ago

7 0

Answer:

Step-by-step explanation:

let my present age=x

then 2(x-5)=x+2

2x-10=x+2

2x-x=2+10

x=12

my age=12 years

age of brother =12-3=9 years

age of sister= 9-2=7 years.

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3 years ago

Determine the displacement of end A with respect to end D if the diameters of each segment are dAB = 0.85 in ., dBC = 1.1 in .,

ipn [44]

Answer / Step-by-step explanation:

It should be noted that the question is incomplete due to the fact that the diagram has not been provided. However, the diagram has been complementing the question has been provided below.

To solve the question in the narrative, we recall the equation used in solving for displacement:

Thus, δₙₐ = Σ pL/AE

Where:

P is applied axial force.

E is the young's modulus of elasticity.

A is the area of cross-section.

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Therefore, -8 (80) ÷ π/4 ( 0.85)² (18) (10³) + 2(150) ÷ π/4 (1.1)² (18) (10³) + 6(100) ÷ π/4 (0.45)² (18) (10³)

Solving further,

we have,

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3 years ago

Use interval notation to express the set of real numbers x that satisfies the inequality (x+2)(x-5) < 0.

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The interval notation to express the set of real numbers <u>x</u> that satisfies the given inequality is -2<x<5. You also can represent it as (-2,5)

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It is an expression mathematical that represents a non-equal relationship between a number or another algebraic expression. Therefore, it is common the use following symbols: ≤ (less than or equal to), ≥ (greater than or equal to), < (less than), and > (greater than).

The solutions for inequalities can be given by: a graph in a number line or numbers.

For solving this exercise, it is necessary to find a number solution for the given inequality.

First, you should find the critical points of the inequality.

x+2=0

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and

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Write, the intervals in between critical points. Therefore, -2<x<5.

Read more about inequalities here.

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