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3 years ago

How to do question 15 part (b)

Mathematics

2 answers:

Ivan3 years ago

3 0

Square root of

-0.8•0.16
--------------
2^ - 5.5

grin007 [14]3 years ago

3 0

You type it into a calculator. common mistake is to not use parenthesis on calculator. A calculator can't tell what you are dividing or is in cube root unless you add parenthesis. So either put parenthesis around top/numerator to include all in cube root divide by parenthesis around bottom/denominator or calculate separately, and divide.

answer to 1 sigfig is: 0.3

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ABC has the points A(1,7) B(-2,2) and C(4,2) as it’s vertices

tekilochka [14]

Part 1

Using the distance formula,

$AB=\sqrt{(-2-1)^{2}+(2-7)^{2}}=\sqrt{34}\\\\BC=\sqrt{(-2-4)^{2}+(2-2)^{2}}=6\\\\AC=\sqrt{(1-4)^{2}+(7-2)^{2}}=\sqrt{34}$

So, the measure of the longest side is 6 units.

Part 2

Triangle ABD will have vertices A(1,7), B(-2, 2), and D(1,2).

We already know that $AB=\sqrt{34}$

Using the distance formula,

$AD=\sqrt{(1-1)^{2}+(7-2)^{2}}=5\\\\BD=\sqrt{(-2-1)^{2}+(2-2)^{2}}=3$

So, ABD is a scalene triangle.

Part 3

From part 2, we know that the length of side AD is 5 units.

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maxonik [38]

I don’t know sorry I am very sorry

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