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Charra [1.4K]
3 years ago
12

Solve the equation for all values of x by completing the square. 3x^2-60x+255=0

Mathematics
1 answer:
erik [133]3 years ago
4 0

Answer:

x=5 and x=15

Step-by-step explanation:

3x^2-60x+225=0

3x^2-60x+225/3=0/3

x^2-20x+75=0

x^2-5x-15x+75=0

x(x-5)-15(x-5)=0

(x-5)(x-15)=0

x-5=0 x-15=0

x=5 x=15

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A jacket costs $35 and has an 8 percent tax rate. Which expression will find the cost of the tax on the jacket?
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35x.08

Step-by-step explanation:

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3 years ago
X-2y=4 x-2y=5 how many solutions does these equations have
cupoosta [38]

Answer:

No solutions

Step-by-step explanation:

Rewrite x-2y=4 x-2y=5 in column form:

x-2y=4

x-2y=5

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6 0
3 years ago
Help please I’m stuck on a few of these
Juli2301 [7.4K]

Answer:

27

Step-by-step explanation:

Basically how it works is that the second f() shows an x where the 3 is, so you plug 3 in for x into the equation. 3 squared or 3 to the power of 2 is 9 because 3 x 3 = 9, and 9 times 3 is 27.

Hope this helps!

INVERSE FUNCTIONS

If the f has a power of -1, then it means the inverse, or the opposite of the function, so you can either switch the y and x values in the function, as the f(x) is also used to represent y, while x is x. You can switch the function to x=3y^2.

BUT THIS IS ONLY FOR INVERSE FUNCTIONS OVER AND UP.

6 0
3 years ago
(5 + 4) + (2 + 6) = 10 +__<br><br> Find the missing number.
LUCKY_DIMON [66]

Answer:

The Missing number is 7

Step-by-step explanation:

5+4=9

2+6=8

9+8=17

And if the equations are supposed to have the same answer then you add 7 to 10 and they both have the same answer.

<em><u>Could I please have BRAINLIEST.</u></em>

4 0
3 years ago
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