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2 years ago

(a+b-c)-(b-a-c) I NEED IT RN FOR A TEST OR ELSE I AM DEAD FOR LIFE

Mathematics

2 answers:

Zepler [3.9K]2 years ago

5 0

Answer:

Step-by-step explanation:

(a+b-c)-(b-a-c)

= a + b - c - b + a + c

= a + a + b - b - c + c

= 2a (Ans)

Marat540 [252]2 years ago

3 0

Here is the answer-I just took a screenshot off of an app called Symbolab which is really good for algebra

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Determine the equation of the tangent line to the given path at the specified value of t. (sin(7t), cos(7t), 2t9/2); t=1

Reptile [31]

Answer:

P(t) = {sin7, cos7, 2} + (7cos7, -7sin7, 9)(t-1)

Step-by-step explanation:

The equation of the tangent line to the given path at the specified value of t is expressed as;

P(t) = f(t0) + f'(t0)(t - t0)

f(t0) = (sin(7t), cos(7t), 2t^9/2)

at t0 = 1;

f(t0) = {sin7(1), cos7(1), 2(1)^9/2}

f(t0) = {sin7, cos7, 2}

f'(t0) = (7cos7t, -7sin7t, 9/2{2t^9/2-1}

f'(t0) = (7cos7t, -7sin7t, 9t^7/2}

If t0 = 1

f'(1) = (7cos7(1), -7sin7(1), 9(1)^7/2)

f'(1) =(7cos7, -7sin7, 9)

Substituting the given function into the tangent equation will give:

P(t) = f(t0) + f'(t0)(t - t0)

P(t)= {sin7, cos7, 2} + (7cos7, -7sin7, 9)(t-1)

The final expression gives the equation of the tangent line to the path.

4 0

2 years ago

Factor completely. 3x^2 −147=

erica [24]

Answer:

$3(x - 7)(x+7)$

Step-by-step explanation:

To factor this, you must first take out the GCF (Greatest Common Factor), that $3x^2$ and -147 both have. The terms only have 3 in common, which can be divided with

$3x^2 - 147\\3(x^2 - 49)$

However, we're still not done since 49 is a perfect square and $(x^2 - 49)$ can be split into 2, like so:

$3(x - 7)(x+7)$

If you're unsure about the final answer, you can multiply it all together to see if you got the original expression.

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2 years ago

Write 7 and 4/5ths as a decimal.

kipiarov [429]

It would be 7.8Since 7 and 4/5ths is a mixed fraction; you would multiply 7X5= 35, then add 35+4= 39. Then you get 39/5=7.8

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2 years ago

I will give you a Brainly crowd if it is right. Will you help me

eimsori [14]

Answer:

A natural disaster that affects a small number of organisms.

Step-by-step explanation:

A natural disaster that affects a small number of organisms since a natural disaster is a sudden and unpredictable for the most part. Due to this, animals don't have time to adapt and this will not affect the evolution process of those species since they are likely to die within a short period of time after the calamity occurs. They will not have enough time to save their own lives so can you expect them to evolve and grow wings to fly away?

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2 years ago

Jessie is saving up for a purse that is $890. She gets $8 allowance per week, and already has $80 saved up. How long will it tak

LekaFEV [45]

Answer:

101.25 weeks

Step-by-step explanation:

890-80=810

810/8=101.25

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2 years ago