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3 years ago

Alec types

Mathematics

1 answer:

erica [24]3 years ago

7 0

Answer:

He can type 4.5/5 of a paragraph

Step-by-step explanation: Because there are 60 seconds in a mintune right. 2/3 of an hour=40 seconds. 1.5/5=20 seconds and 60 seconds=4.5/5

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What is the absolute value of <br> |-20|+|30|

Marianna [84]

Answer: 50

Step-by-step explanation:

|-20| = 20

|30| = 30

20 + 30 = 50

5 0

3 years ago

Find the critical numbers sin^2x+cosx 0 < x< 2pi

ryzh [129]

$\bf sin^2(x)+cos(x)\iff [sin(x)]^2+cos(x)\\\\
-----------------------------\\\\
\cfrac{dy}{dx}=2sin(x)cos(x)-sin(x)\implies 0=2sin(x)cos(x)-sin(x)
\\\\\\
0=sin(x)[2cos(x)-1]\implies 
\begin{cases}
0=sin(x)\\
sin^{-1}(0)=\measuredangle x\\
\pi \\
----------\\
0=2cos(x)-1\\\\ \frac{1}{2}=cos(x)\\\\ cos^{-1}\left( \frac{1}{2} \right)=\measuredangle x\\\\ \frac{\pi }{3},\frac{5\pi }{3}
\end{cases}$

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4 years ago

Divide, if possible. check each answer. 87/0

EleoNora [17]

Note that any number divided by 0 is undefined.

From the problem,

$\frac{87}{0}$

Since 87 is divided by 0, the answer is undefined

7 0

1 year ago

Draw a number line and mark on it, if possible, all described points. Numbers that are larger than 2 and smaller than 5.

Flura [38]

Step-by-step explanation:

The number line below describes number larger than 2.

This can be written as {x: x > 2}.

Note that the indicator on 2 is not shaded, this shows that 2 is not included in the set.

..|......|......|......|......|......|......|......|......|......|..

-2....-1.....0....1.....2.....3....4.....5....6.....7

............................O-------------------------->

.......................................(x > 2)

The number line below describes number smaller than 5. This can be written as {x: x < 5}. 5 is not included in this set neither, so, the indicator is also not shaded.

..|......|......|......|......|......|......|......|......|......|..

-2....-1.....0....1.....2.....3....4.....5....6.....7

<-------------------------------------O

...............(x < 5)

LOOK AT THIS EXAMPLE BELOW

..|......|......|......|......|......|......|......|......|......|..

-2....-1.....0....1.....2.....3....4.....5....6.....7

<--------------------------------•

...............(x ≤ 4)

Note that the indicator on 4 is shaded black. It shows that 4 is included in the set.

6 0

4 years ago

Solve the equations. 4( 3d+23)= 12+32d

mr_godi [17]

Answer:

d = 4

Step-by-step explanation:

4(3d + 23) = 12 + 32d ← distribute parenthesis on left side

12d + 92 = 12 + 32d ( subtract 32d from both sides )

- 20d + 92 = 12 ( subtract 92 from both sides )

- 20d = - 80 ( divide both sides by - 20 )

d = 4

3 0

3 years ago