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3 years ago

I need help on these questions.

Mathematics

2 answers:

Slav-nsk [51]3 years ago

5 0

1. = 12a
2. = -6b
3. = 20c
4. = 6d

sergeinik [125]3 years ago

5 0

1. 3(a+3) > 3*a + 3*3 = 3a + 9 same with number 2
3. 5(6c - 2) > 5*6c - 5*2 = 30c - 10 same with number 4

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A boat traveld 27 miles in 2 hours. At this rate ow many miles will the boat travel in .5 hour?

Andrew [12]

You have to ask yourself “how many half hours segments are in 2 hours?” The answer is 4. Now, since you want to find out how many miles the boat can travel in half an hour, divide 27 by 4 (because there are four half hours in 2 hours). 27 divided by 4 equals 6.75. The boat travels 6.75 miles in half an hour.

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4 years ago

How many ways can you make a dollar with 3 quarters 6 dimes and 8 nickels?

melamori03 [73]

Answer:

Step-by-step explanation:

3 quarters + 2 dimes + 1 nickel = 1 dollar

6 dimes + 8 nickels = 1 dollar

7 nickels + 2 quarters + 1 dime = 1 dollar

I think that is all, I hope this helps!

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3 years ago

Read 2 more answers

Help help help help help

Akimi4 [234]

Answer:

3 left; 1 down

Step-by-step explanation:

You can determine the translation by identifying corresponding points on the two figures and counting the grid squares between them.

Here Q is a translation of P by 3 squares to the left and 1 square down.

3 0

3 years ago

Put the differential equation 9ty+ety′=yt2+81 into the form y′+p(t)y=g(t) and find p(t) and g(t). p(t)= help (formulas) g(t)= he

alexgriva [62]

Answer:

$p(t) = \frac{9t^{3} + 729t - 1}{e^{t}(t^{2} + 81) }$

g(t) = 0

And

The differential equation $9ty + e^{t}y' = \frac{y}{t^{2} + 81 }$ is linear and homogeneous

Step-by-step explanation:

Given that,

The differential equation is -

$9ty + e^{t}y' = \frac{y}{t^{2} + 81 }$

$e^{t}y' + (9t - \frac{1}{t^{2} + 81 } )y = 0\\e^{t}y' + (\frac{9t(t^{2} + 81 ) - 1}{t^{2} + 81 } )y = 0\\e^{t}y' + (\frac{9t^{3} + 729t - 1}{t^{2} + 81 } )y = 0\\y' + [\frac{9t^{3} + 729t - 1}{e^{t}(t^{2} + 81) } ]y = 0$

By comparing with y′+p(t)y=g(t), we get

$p(t) = \frac{9t^{3} + 729t - 1}{e^{t}(t^{2} + 81) }$

g(t) = 0

And

The differential equation $9ty + e^{t}y' = \frac{y}{t^{2} + 81 }$ is linear and homogeneous.

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3 years ago

Simplify.<br> (w5)<br> I need this ASAP please

Ilya [14]

I’m pretty sure it’s w^25

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3 years ago