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Allushta [10]
3 years ago
11

Evaluate the expression t-6/4 for t =38

Mathematics
1 answer:
Finger [1]3 years ago
8 0

Answer:

Exact Form:

73  over 2

Decimal Form:

36.5

Mixed Number Form:

36   1 over 2

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

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$30.50 - $17.79= what<br> Solve this problem in two diffrent ways (5th grade math)
puteri [66]
$30.50-$17.79 is $12.71. I hope that helps you :)
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3 years ago
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SSSSS [86.1K]
Sin x = b/c
Cos x = a/c
Tan x = b/a
4 0
2 years ago
A machine starts dumping sand at the rate of 35 m3/min, forming a pile in the shape of a cone. The height of the pile is always
juin [17]
We are given with the following given
dV/dt = 35 m3/min
h = (3/2)D

What is asked is
dr/dt at t = 7 min

The volume of a cone is
V = (1/3)πr²h

From the given
h = (3/2)D
since D = 2r
h = 3r

Subsituting
V = πr³

At t = 7 min, the volume is
V = 35(7)
V = 245
and the radius is
245 = πr³
r = 4.27

Differentiating the volume
dV/dt = 3πr² dr/dt
From the given
dV/dt = 35

Subsituting
35 = 3πr² dr/dt
So,
dr/dt = 0.20 m/s
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6 0
3 years ago
10% of what number is 78?
Zepler [3.9K]

Answer: x = 780

Step-by-step explanation: Well <u><em>percent</em></u> means <em>over 100</em> so we can set up an equation for this problem by reading it from left to right.

So we know that <u><em>10%</em></u> means <em>10/100</em>, <u><em>of</em></u> means times, <em><u>what</u></em> <em><u>number</u></em> means <em>x</em>, <u><em>is</em></u> means <em>equals</em>, and <em><u>12</u></em> means 12.

Notice that <em>10/100</em> can be reduced to 1/10.

So rewriting our problem we have <em>X/10 = 78</em>.

To get rid of the fraction, we multiply both sides of the equation by 10 and we have <em>x = 780</em>. So, 10% of 780 is 78.

Now let's check our answer back in the original problem to see if it makes sense.

We have <em>10% of 780 is 78</em>. Well we know that 100% of of 780 would be 780 so 10% of 780 should be alot less than 780 so 78 seems to make sense.

Image provided showing my work.

5 0
3 years ago
Read 2 more answers
the population of a town increases by 8% annually if the present population is 54000 what was it a year ago?
yKpoI14uk [10]

Answer:

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Step-by-step explanation:

Multiply 54,000 by 92%. 100%(this years population)-8%=92%

54000*0.92 = 49680, people one year ago.

8 0
3 years ago
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