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3 years ago

Rewrite 0.55 as a percent

Mathematics

2 answers:

valentinak56 [21]3 years ago

5 0

It is 55% because just multiply it by 100.

mixas84 [53]3 years ago

3 0

The answer to this is 55%

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What is 3(x - 1) = 2x + 9

notsponge [240]

Answer:

x=12

Step-by-step explanation:

Distribute:

3x - 3 = 2x + 9

Combine like terms to one side:

x = 12

6 0

3 years ago

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If a certain cannon is fired from a height of 8.8 meters above the ground, at a certain angle, the height of the cannonball ab

Dennis_Churaev [7]

Answer:

It would take approximately 6.50 second for the cannonball to strike the ground.

Step-by-step explanation:

Consider the provided function.

$h(t)=-4.9t^2+30.5t+8.8$

We need to find the time takes for the cannonball to strike the ground.

Substitute h(t) = 0 in above function.

$-4.9t^2+30.5t+8.8=0$

Multiply both sides by 10.

$-49t^2+305t+88=0$

For a quadratic equation of the form $ax^2+bx+c=0$ the solutions are: $x_{1,\:2}=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

Substitute a = -49, b = 305 and c=88

$t=\frac{-305+\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}=-\frac{-305+\sqrt{110273}}{98}\\t = \frac{-305-\sqrt{305^2-4\left(-49\right)88}}{2\left(-49\right)}= \frac{305+\sqrt{110273}}{98}$

Ignore the negative value of t as time can't be a negative number.

Thus,

$t=\frac{305+\sqrt{110273}}{98}\approx6.50$

Hence, it would take approximately 6.50 second for the cannonball to strike the ground.

6 0

3 years ago

Consider the expression (a + b)n. According to the Binomial Theorem, the kth term in the expanded form of this expression (where

TEA [102]

The correct answer is

C.

7 0

3 years ago

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Help please multiple choice..... (;

ahrayia [7]

It would be D because you add the the 3 and the 5 and you get 8

5 0

3 years ago

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Prove that sin(x + pi) = -sinx <br><br> *show work

natali 33 [55]

Answer:

Step-by-step explanation:

Use the identity $sin(a+b)=sin a cosb+sinbcosa$ where $a=x$ and $b=\pi$ .

This results in $sinxcos\pi +sin\pi cosx$

From the unit circle we know that $cos\pi =-1$ and $sin\pi =0$

Substitute

$sinx(-1)+(0)cosx$

Simplify

$-sinx$

5 0

3 years ago