3 years ago

What is (4x + 2) - (2x + 1)?

Mathematics

1 answer:

daser333 [38]3 years ago

7 0

2x + 1

You can find that by switching the signs in the second set of parenthesis and then adding.

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Please help thanks!

Kryger [21]

Answer:

All except irrational-

Step-by-step explanation:

100/100 is 1. This makes it real, an integer, whole,natural, and rational.

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4 years ago

The work of a student to solve the equation 4(2x − 4) = 8 + 2x + 8 is shown below:

shusha [124]

In step two. If we look on the left side of the equation in the first step, it reads 4(2x-4). When a number is multiplying an expression in brackets, we have to multiply every term in the brackets by the number in front of the brackets. In this case, it would be 4*2x + 4*(-4), which is 8x - 16. So the correct option would be the second (8x-16=16+2x) (the right side of the eqtn was 8+2x+8 and if we combine like terms we get 16+2x)

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3 years ago

How tall is a building that casts a 71-ft shadow when the angle of elevation of the sun is 29 degrees.Round to the nearest foot

skad [1K]

Solution

We will draw a diagram to illustrate the information

Using the concept of SOHCAHTOA

We are given adjacent and we want to find opposite

$\begin{gathered} tan\theta=\frac{opposite}{adjacent} \\ tan29=\frac{H}{71} \\ cross\text{ multiply} \\ H=71tan29 \\ H=39.35594265 \\ H=39ft \end{gathered}$

Therefore, the answer is

$undefined$

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2 years ago