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3 years ago

12

If three times a number is 34 1/2, then half the number is

1 answer:

Nesterboy [21]3 years ago

7 0

Let the number be n. Then 3n = 34.5, and n = 34.5/3 = 11.5.

Half of this is 5.75, or 5 3/4.

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Jina is pumping water into a tank at a rate of 15 liters per minute. Since she started pumping water, 13 liters has splashed out

baherus [9]

Step-by-step explanation:

subtract-13 from -13 get zero

then, subtract 13 from 77 =64

then do divide 15 from 15

then divide 15 from 64 = 4.26 repeat

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2 years ago

The sum of two numbers is 43, and their product is 450. What is their difference?

kow [346]

Answer:

List the factors of 450

1,450

3,150

5,90

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15,30

18,25

The factor with the sum of 43 is 18+25

25-18=7 so the difference is 7

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Step-by-step explanation:

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3 years ago

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andrey2020 [161]

Answer:

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Step-by-step explanation:

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3 years ago

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Show that y=cos(t)y=cos(t) is a solution to (dydt)2=1−y2(dydt)2=1−y2. Enter your answers below in terms of the independent varia

GrogVix [38]

Answer:

$(\frac{dy}{dt})^2=sin^2t$

Step-by-step explanation:

$y=cost$

DE : $(\frac{dy}{dt})^2=1-y^2$

If y is a solution of given DE then it satisfied the DE.

Differentiate w.r.t t

$\frac{dy}{dt}=-sint$

Using the formula

$\frac{d(cosx)}{dx}=-sinx$

LHS: $(\frac{dy}{dt})^2=(-sint)^2=sin^2t$

RHS

$1-y^2=1-cos^2t=sin^2t$

By using the formula

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LHS=RHs

Hence, y is a solution of given DE

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3 years ago

3. Let h(t) = 16t – 4t -1. Evaluate h(3).

Anika [276]

Answer:

h(3) = 35

Step-by-step explanation:

Simplify h(t) = 16t - 4t - 1 to h(t) = 12t -1

Then, plug 3 into the t

h(3) = 12*3 - 1 = 36 - 1 = 35

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3 years ago

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