How to write a story about the doubles plus 2 fact 5+7=12

Mathematics

1 answer:

Romashka-Z-Leto [24]3 years ago

3 0

There are five birds in a tree then 7 more came there are now 17 birds in total

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Write the following proportion: 8 is to 64 as 2 is to X

Andrews [41]

1 way
$\frac{8}{64} = \frac{2}{x} \\ \\ 
 \frac{8:4}{64:4} = \frac{2}{x} \\ \\ 
 \frac{2}{16} = \frac{2}{x}$ ⇔ x = 16
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2.way
$\frac{8}{64} = \frac{2}{x}$
We multiply the cross

$8x = 2 * 64
8x = 128
x = 16$

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3 years ago

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Find the value of (10 1/5) (-5)

lara31 [8.8K]

The value of (10 1/5) (-5) is -51.

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3 years ago

Write the given second order equation as its equivalent system of first order equations. u′′−5u′−4u=1.5sin(3t),u(1)=1,u′(1)=2.5

lakkis [162]

Answer:

hi your question options is not available but attached to the answer is a complete question with the question options that you seek answer to

Answer: v = 5v + 4u + 1.5sin(3t),

1.5sin(3t)

Step-by-step explanation:

u" - 5u' - 4u = 1.5sin(3t) where u'(1) = 2.5 u(1) = 1

v represents the "velocity function" i.e v = u'(t)

As v = u'(t)

u' = v

since u' = v

v' = u"

v' = 5u' + 4u + 1.5sin(3t) ( given that u" - 5u' - 4u = 1.5sin(3t) )

= 5v + 4u + 1.5sin(3t) ( noting that v = u' )

so v' = 5v + 4u + 1.5sin(3t)

d/dt $\left[\begin{array}{ccc}u&\\v&\\\end{array}\right]$ = $\left[\begin{array}{ccc}0&1&\\4&5&\\\end{array}\right]$ $\left[\begin{array}{ccc}u&\\v&\\\end{array}\right]$ + $\left[\begin{array}{ccc}0&\\1.5sin(3t)&\\\end{array}\right]$