-2.4-(-7) has the same result as -2+7 because the negative sign and the minus sign cancel each other out. Think of it like this. If you cross the negative sign and the minus sign together, then it makes a plus sign.

Step-by-step explanation:

I gave a basic answer. You might have to elaborate more on this.

8 0

3 years ago

Read 2 more answers

True or false

Nadusha1986 [10]

Step-by-step explanation:

2⁴×3²

2⁷

True

1⁰×0¹

1×0

0≠ 1

False

3⁴>4³

81>64

True

4⁰+5⁰+6⁰=(4+5+6)⁰

1+1+1=(15)⁰

3≠0

False

4 0

3 years ago

Read 2 more answers

An electrician leans an extension ladder against the outside wall of a house so that it reaches an electric box 22 feet up. The

jeka57 [31]

The ladder and the outside wall form a right triangle

The length of the ladder is 97.8 feet

<h3>How to determine the length of the ladder?</h3>

The given parameters are:

Distance (B) = 22 feet

Angle of elevation (θ) = 77 degrees

The length (L) of the ladder is calculated using the following cosine ratio

cos(θ) = B/L

So, we have:

cos(77) = 22/L

Make L the subject

L = 22/cos(77)

Evaluate the product

L = 97.8

Hence, the length of the ladder is 97.8 feet