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r-ruslan [8.4K]
3 years ago
13

Brandon had already read 6 books this year before joining a book club, and he plans to read 1 book every month now that he has j

oined. If Brandon has read 15 books so far, how many months has he been with his book club?
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
6 0
15 - 6 = 9
So 9 months
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I am thinking of a number. If you multiply my number by 4, add -4 to the product, and then take 1/3 of the sum, the result is -6
gregori [183]

Answer:

-3.5??

Step-by-step explanation:

Work backwards :)

4 0
3 years ago
Prove the quadratic formula
STALIN [3.7K]

ax² + bx + c = 0

x = (-b ± √(b² - 4ac))/2a


First, rewrite the first equation so that the first coefficient is 1. Divide everything by a.

(ax² + bx + c = 0)/a =

x² + (b/a)x + (c/a) = 0

Isolate (c/a) by subtracting (c/a) from both sides

x² + (b/a)x + (c/a) (-(c/a) = 0 (- (c/a)

x² + (b/a)x = 0 - (c/a)

Add spaces

x² + (b/a)x          =  -c/a

Take 1/2 of the middle term's coefficient and square it. Remember that what you add to one side, you add to the other.

x² + (b/a)x + (b/2a)² = -c/a + (b/2a)²

Simplify the left side of the equation.

x² + (b/a)x + (b/2a)² = (x + (b/2a))²

(x + b/2a))² = ((b²/4a²) - (4ac/4a²)) -> ((b² - 4ac)/(4a²))

Take the square root of both sides of the equation

√(x + b/2a))² = √((b²/4a²) - (4ac/4a²))

x + b/(2a) = (±√(b² - 4ac)/2a

Simplify. Isolate the x.

x = -(b/2a) ± (∛b² - 4ac)/2a = (-b ± √(b² - 4ac))/2a

~

3 0
3 years ago
Simplify radicals please
Angelina_Jolie [31]
Answer:

-24x^5 y^2 z^8 /3yz

8 0
2 years ago
7th grade math!<br><br> Divide 20xy^4z^12 by 4x^3yz^24<br><br> Answer options in picture above.
luda_lava [24]

Answer:third one

Step-by-step explanation:

6 0
3 years ago
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Aviv thinks of two numbers between 6 and 50. The highest common factor of his two numbers is 5. The lowest common multiple of hi
slega [8]

Answer:

15 and 20.

Step-by-step explanation:

The 2 numbers are both divisible by 5.

Listing numbers whose LCM is 60 and divisible by 5.

20 and 30 :- not this as the HCF is 10.

15 and 20 : - HCF = 5 and LCM = 60.

5 0
2 years ago
Read 2 more answers
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