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2 years ago

Help me please im not good at word problems

Mathematics

1 answer:

Iteru [2.4K]2 years ago

3 0

Hi there!

So let's make this easier for you to understand. Here's the important information we know :

Earn = + (4x + 12) points

Lose = - (2x - 5) points

To know the total number of points you have, you'll need to subtract the points you lost from the points you earned :

(4x + 12) - (2x - 5) = Number of points you have now (let's say "?")

Now all you have to do is solve this in order to have a simplified expression:

(4x + 12) - (2x - 5) = ?

See the subtraction sign between the two group terms? Think of it as moving into the secon group of terms and being placed before each of them. So in other words, you'll need to distribute the minus (-) sign to the whole second parentheses. One this is done, you can remove the parentheses and do some simple adding and subtraction :

(4x + 12) -2x + 5 = ?

4x + 12 -2x + 5 = ?

4x - 2x = 2x

12 + 5 = 17

2x + 17 = ?

So your answer is : The expression that represents the total number of points you have now is 2x + 17.

There you go! I really hope this helped, if there's anything just let me know! :)

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Write an equation for the line parallel to y= -2x+1 that contains (-2,5)

grin007 [14]

Answer:

y = - 2x + 1

Step-by-step explanation:

Parallels line have the same slope, when an equation is in the form y= mx + b, m is the slope. In this problem slope = - 2

Now with the slope what is missing is the y-intercept, the problem says that the line contains the point (-2, 5), replacing that point in the equation you can solve it to find the y-intercept

y = mx + b

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2 years ago

Given: sin(18m-12)=cos(7m+2), find the value of m.

V125BC [204]

Answer:

m = -2/7 + π/14 + (π n_1)/7 for n_1 element Z

or m = 2/3 - (π n_2)/18 for n_2 element Z

Step-by-step explanation:

Solve for m:

-cos(7 m + 2) sin(12 - 18 m) = 0

Multiply both sides by -1:

cos(7 m + 2) sin(12 - 18 m) = 0

Split into two equations:

cos(7 m + 2) = 0 or sin(12 - 18 m) = 0

Take the inverse cosine of both sides:

7 m + 2 = π n_1 + π/2 for n_1 element Z

or sin(12 - 18 m) = 0

Subtract 2 from both sides:

7 m = -2 + π/2 + π n_1 for n_1 element Z

or sin(12 - 18 m) = 0

Divide both sides by 7:

m = -2/7 + π/14 + (π n_1)/7 for n_1 element Z

or sin(12 - 18 m) = 0

Take the inverse sine of both sides:

m = -2/7 + π/14 + (π n_1)/7 for n_1 element Z

or 12 - 18 m = π n_2 for n_2 element Z

Subtract 12 from both sides:

m = -2/7 + π/14 + (π n_1)/7 for n_1 element Z

or -18 m = π n_2 - 12 for n_2 element Z

Divide both sides by -18:

Answer: m = -2/7 + π/14 + (π n_1)/7 for n_1 element Z

or m = 2/3 - (π n_2)/18 for n_2 element Z

3 0

3 years ago

Hey!Can somebody help me please?

tia_tia [17]

Answer:

I only know the first one....

4+2+1=7

49p/7= 7p

4units:2units:1units

4×7p= 28p

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divided it is...

28p:14p:7p

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2 years ago

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jonny [76]

We aer goint to eliminate the x's
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3 years ago

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saveliy_v [14]

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$5s^4(3s^7-5)$

8 0

2 years ago