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3 years ago

Help. Really help. It’s timed. HELP PLEASE

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

7 0

Answer:

c i think

Step-by-step explanation:

set the denominator to equal 0

(x-7)(x+5) = 0

x = 7, x = -5

all real numbers except -5 and 7

hram777 [196]3 years ago

6 0

Answer:

its b

Step-by-step explanation:

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Please help out :)) and give a explanation

wolverine [178]

9514 1404 393

Answer:

y = 3x

Step-by-step explanation:

A proportional relation has the equation ...

y = kx

To write the desired equation, you need to know the value of k. That can be found from the given information:

for x = 2, y = 6

6 = k·2

3 = k . . . . divide by 2

Now, we know the equation can be written ...

y = 3x

5 0

2 years ago

Pipe A can fill a tank in 5 hours. Pipe B can fill the same tank in 7 hours. If both pipes were open, how long would it take the

-BARSIC- [3]

Answer:

It would take them 6 hours to fill an empty tank.

Step-by-step explanation:

Add the amount of time it takes Pipe A and Pipe B to fill an empty tank together (5 + 7) and then divide your sum by two. You should get 12 / 2 = 6.

Hope This Helps!

8 0

2 years ago

How many ways can 6 people be seated in 4 seats

mojhsa [17]

switting upwards this should help

5 0

3 years ago

State one form of the Law of Cosines and provide a trick for writing the other two forms and explain when Law of Cosines should

Yuki888 [10]

Solving for Angles

$\displaystyle \frac{a^2 + b^2 - c^2}{2ab} = cos∠C \\ \frac{a^2 - b^2 + c^2}{2ac} = cos∠B \\ \frac{-a^2 + b^2 + c^2}{2bc} = cos∠A$

* Do not forget to use the inverse function towards the end, or elce you will throw your answer off!

Solving for Edges

$\displaystyle b^2 + a^2 - 2ba\:cos∠C = c^2 \\ c^2 + a^2 - 2ca\:cos∠B = b^2 \\ c^2 + b^2 - 2cb\:cos∠A = a^2$

You would use this law under two conditions:

One angle and two edges defined, while trying to solve for the third edge
ALL three edges defined

* Just make sure to use the inverse function towards the end, or elce you will throw your answer off!

_____________________________________________

Now, JUST IN CASE, you would use the Law of Sines under three conditions:

Two angles and one edge defined, while trying to solve for the second edge
One angle and two edges defined, while trying to solve for the second angle
ALL three angles defined [of which does not occur very often, but it all refers back to the first bullet]

* I HIGHLY suggest you keep note of all of this significant information. You will need it going into the future.

I am delighted to assist you at any time.

7 0

2 years ago

The rabbit population in a certain area is 500% of last years population. There are 900 rabbits this year. How many were there t

12345 [234]

Answer:

180 rabbits

Step-by-step explanation:

The correct question is

The rabbit population in a certain area is 500% of last years population. There are 900 rabbits this year. How many were there last year?

we know that

900 rabbits represent 500% of last year population

Last year population represent 100%

using proportion

Find out how many rabbits represent a percentage of 100%

$\frac{900}{500\%}=\frac{x}{100\%}\\\\x=900(100)/500\\\\x=180\ rabbits$

7 0

3 years ago