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3 years ago

There are 120 minutes in 2 hours. How many minutes are in 15 hours? what operation do I use

Mathematics

2 answers:

MArishka [77]3 years ago

6 0

The operation is multiplication . Just do 60 times 15 . You will get 900

erma4kov [3.2K]3 years ago

3 0

$120\ minutes\ in\ 2\ hours\\\\
x\ minutes\ \ in\ \ 15\ hours\\\\\Making\ ratio:\\
120-2\\x-15\\\\Cross\ multiplication\\\\
120*15=2x\\\\1800=2x\ \ \ \ | divide\ by\ x\\\\
x=900\\\\900\ minutes\ in\ 15\ hours.$

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Help please! Thank you!!

umka2103 [35]

Answer:

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Step-by-step explanation:

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3 0

3 years ago

Prove that :( 1 + 1/<img src="https://tex.z-dn.net/?f=tan%5E%7B2%7DA" id="TexFormula1" title="tan^{2}A" alt="tan^{2}A" align="ab

Aliun [14]

Answer:

See explanation

Step-by-step explanation:

Simplify left and right parts separately.

Left part:

$\left(1+\dfrac{1}{\tan^2A}\right)\left(1+\dfrac{1}{\cot ^2A}\right)\\ \\=\left(1+\dfrac{1}{\frac{\sin^2A}{\cos^2A}}\right)\left(1+\dfrac{1}{\frac{\cos^2A}{\sin^2A}}\right)\\ \\=\left(1+\dfrac{\cos^2A}{\sin^2A}\right)\left(1+\dfrac{\sin^2A}{\cos^2A}\right)\\ \\=\dfrac{\sin^2A+\cos^2A}{\sin^2A}\cdot \dfrac{\cos^2A+\sin^A}{\cos^2A}\\ \\=\dfrac{1}{\sin^2A}\cdot \dfrac{1}{\cos^2A}\\ \\=\dfrac{1}{\sin^2A\cos^2A}$

Right part:

$\dfrac{1}{\sin^2A-\sin^4A}\\ \\=\dfrac{1}{\sin^2A(1-\sin^2A)}\\ \\=\dfrac{1}{\sin^2A\cos^2A}$

Since simplified left and right parts are the same, then the equality is true.

3 0

3 years ago

Work out the diffeence beteeen 77.5 and 2.27

Stella [2.4K]

77.5
- 2.27
______
75.37

6 0

3 years ago

Read 2 more answers

George placed the numbers -1/2 , 8/9 , 0.2 and on the numberline . Which of the numbers is furthest from zero ?

dimaraw [331]

Furthest from 0, so I am going to take the absolute value of these numbers. The absolute value will tell us how far away from 0 these numbers are.
|-1/2| = |- 0.5| = 0.5
|8/9| = |0.88| = 0.88
|0.2| = 0.2

so the number furthest from 0 is 8/9

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3 years ago

Which of the following functions has a graph that is a line? f(x) = |x| f(x) = x f(x) = x 2

sattari [20]

Answer:

f(x) = x

Step-by-step explanation:

f(x) = |x| will give you V graph

f(x) = x will give you line graph (linear)

f(x) = x² will give you a curve graph

7 0

3 years ago