10-(5÷1×2) How do you solve this using order of operations

Mathematics

1 answer:

kozerog [31]4 years ago

5 0

Answer

Step-by-step explanation:

Solve parentheses first ,which is 5 divided by 1 equals 5 then do 5x2=10 then do 10-10=0

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What is the distance between the zoo and the library?

KATRIN_1 [288]

The answer is as follow

sin60° = 400√3 / H1, implies H1= 400√3 / sin60° 
sin30° = 400√3 / H2, implies H2= 400√3 / sin30° 
and the if the distance is D,
so we can find D such that D= H2 - H1=400√3 / sin30° - 400√3 / sin60°
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3 0

3 years ago

I need someone to explain what I did wrong

egoroff_w [7]

Answer:

g(f(4)) = 9

Step-by-step explanation:

Fill in gf(x) for where x is in g(x): (x-7)²

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3 years ago

The vertices of a triangle ABC are A(7, 5), B(4, 2), and C(9, 2). What is measure of angle ABC? 30° 45° 56.31° 78.69°

GenaCL600 [577]

The measure of angle ABC is 45°

Explanation

Vertices of the triangle are: A(7, 5), B(4, 2), and C(9, 2)

According to the diagram below....

Length of the side BC (a) $=\sqrt{(4-9)^2+(2-2)^2}= \sqrt{25}= 5$

Length of the side AC (b) $= \sqrt{(7-9)^2 +(5-2)^2}= \sqrt{4+9}=\sqrt{13}$

Length of the side AB (c) $= \sqrt{(7-4)^2 +(5-2)^2} =\sqrt{9+9}=\sqrt{18}$

We need to find ∠ABC or ∠B . So using Cosine rule, we will get...

$cosB= \frac{a^2+c^2-b^2}{2ac} \\ \\ cos B= \frac{(5)^2+(\sqrt{18})^2-(\sqrt{13})^2}{2*5*\sqrt{18} }\\ \\ cosB= \frac{25+18-13}{10\sqrt{18}} =\frac{30}{10\sqrt{18}}=\frac{3}{\sqrt{18}}\\ \\ cosB=\frac{3}{3\sqrt{2}} =\frac{1}{\sqrt{2}}\\ \\ B= cos^-^1(\frac{1}{\sqrt{2}})= 45 degree$