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Fantom [35]
3 years ago
14

dle" class="latex-formula">
Mathematics
1 answer:
Pavel [41]3 years ago
7 0

Answer:

<h3>x = -3 , x = 3</h3>

Step-by-step explanation:

7x² - 3 = 60

7x² - 3 - 60 = 0

7x² - 63 = 0

Simplify the terms

Divide both terms by 7

That's

x² - 9 = 0

Solve the quadratic equation

Use difference of two squares

That's

a² - b² = ( a + b)(a - b)

x² - 9 = 0

(x + 3)(x - 3) = 0

x + 3 = 0 x - 3 = 0

x = - 3 x = 3

Hope this helps you

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-2(4x+4)-3x-2=34 what's the answer
Julli [10]

Answer:

x = -4

Step-by-step explanation:

Given: -2(4x + 4) - 3x - 2 = 34

To solve this equation, we have to isolate the variable. (Get x by itself).

We'll follow the PEMDAS rule as far as parentheses.

So, -2(4x + 4) - 3x - 2 = 34

= -8x - 8 - 3x - 2 = 34

Now, we have to get x by itself. To do this, we'll move the numbers without variables to the other side.

Hence:

-8x - 8 - 3x - 2 = 34

     +8        +2       +8  +2

-8x - 3x = 34 + 8 + 2

Now, we'll simplify.

-11x = 44

Lastly, to rid the negative eleven from the x, we have to divide negative eleven by the rest of the equation.

-11x = 44

-------------

-11

x = -4

4 0
3 years ago
204 thousands equals
jeka57 [31]
204 thousand equals 204,000 or two hundred and four thousand. 
Hope this helps.
6 0
3 years ago
Abby's auto wash earns revenues of $14 per customer. After serving 2 customer, how much revenue will abby's auto wash have?​
ruslelena [56]

Answer:14+14=28

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
R+r+2r-r+4r combine like terms and solve
goldenfox [79]

R+r+2r-r+4r

R + r + 2R + 4r = R+7r

R+7r - -r =

R+6r

6 0
3 years ago
Andrew has already played 32 minutes on his video game today and wants to play an additional 15 minutes each of x games after sc
artcher [175]

Answer:

y = 15x+32

Step-by-step explanation:

Given

y to be the total minutes Andrew will play video games today

x is the total number of games played after school

If he wants to play an additional 15 minutes each of x games after school today, the total minutes he will use for the x games will be 15* x = (15x)minutes

We are told that he has initially spent 32minutes on video games. hence;

Total minutes Andrew used on games y = (15*x)+32

The required equation will be y = 15x+32

7 0
3 years ago
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