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4 years ago

How to simplify 3t(t-5) + 6t 2

Mathematics

1 answer:

kotegsom [21]4 years ago

5 0

Answer: 3t^2-9t+2

Step-by-step explanation: im assuming you meant +2. First you need to distribute 3t^2-15t+6t+2 and then you need to combine like terms.

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Sin(cos^-1 x)<br><br> how to solve?

tatiyna

Answer:

$sin(cos^{-1}x)=\sqrt{1-x^2}$

Step-by-step explanation:

let us assume

$cos^{-1} x=\theta\\x=cos\theta\\$

now

$sin(cos^{-1}x)$ can be written as $sin\theta$

we know $sin^2\theta+cos^2\theta=1$

so $sin^2\theta=1-cos^2\theta$

$sin\theta=\sqrt{1-cos^2\theta}$

now from above equation we can say that

$sin\theta=\sqrt{1-x^2}$

$sin(cos^{-1}x)=\sqrt{1-x^2}$

7 0

3 years ago

How do I get a square root

Maslowich

Answer:

find the closest perfect square root to the number you are trying to solve.

to get a square root, you need to find the number that multiplied by itself will give you the number.

4 0

3 years ago

Is the square root of 1,815 rational?

Masja [62]

Answer:

It is not

Step-by-step explanation:

4 0

4 years ago

Read 2 more answers

Kristy earns $134 each day she works. Every day she spends $8 on breakfast and $12 on lunch. How much money will she have in 25

GaryK [48]

Answer:

Money she have in 25 days = $2850

Money she have in 50 days = $5700

Step-by-step explanation:

Kristy earns each day = $134

Spends on breakfast & lunch = $8 + $12 = $20

Reaming about each day = $134 - $20

= $114

Money she have in 25 days = 25 x $114

= $2850

Money she have in 50 days = 50 x $114

= $5700

7 0

3 years ago

Sgt. Merritt has bought a house now that his tour of duty is up. He wants to stain the wood floors of the living room, which mea

Lunna [17]

It costs $ 30240 to stain floor of the entire room

<em><u>Solution:</u></em>

<em><u>Given that,</u></em>

Sgt. Merritt has bought a house now that his tour of duty is up

He wants to stain the wood floors of the living room, which measure 18 x 14

Therefore,

length = 18 yards

Width = 14 yards

$Area = length \times width\\\\Area = 18 \times 14\\\\Area = 252$

Thus area of wood floors is 252 square yards

<h3><u>How much will it cost to stain floor of the entire room?</u></h3>

The stain costs $120 per square yard

$Cost = 252 \times 120\\\\Cost = 30240$

Thus it costs $ 30240 to stain floor of the entire room

3 0

3 years ago