4 years ago

Find the sum of 5+(-7)=?. Use a number line to verify your answer

Mathematics

2 answers:

Nina [5.8K]4 years ago

6 0

Answer:

-2

Step-by-step explanation:

5+(-7) is the same as saying 5-7, so lets looks at this

Brut [27]4 years ago

6 0

It 5+7=12 because u don’t the negative so u do the plus so it 5+7=12 happy to help

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DochEvi [55]

Answer:

The height of tree house is 70.71 feet

Step-by-step explanation:

We are given that A 100-foot rope from the top of a tree house to the ground forms a 45∘ angle of elevation from the ground

Refer the attached figure

Length of rope AC = Hypotenuse =100 feet

The top of a tree house to the ground forms a 45∘ angle of elevation from the ground = $\angle ACB = 45^{\circ}$

We are supposed to find the height of tree house i.e.AB = Perpendicular

So, Using trigonometric ratio

$Sin \theta = \frac{perpendicular}{Hypotenuse}\\Sin 45= \frac{AB}{AC}\\\frac{1}{\sqrt{2}}=\frac{AB}{100}\\100 \times \frac{1}{\sqrt{2}}=AB\\70.71=AB$

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