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sweet [91]
3 years ago
7

Write 12.9 + 8 using words.

Mathematics
1 answer:
Anna35 [415]3 years ago
7 0
Twelve point nine plus eight equals twenty point nine (12.9 + 8 = 20.9)
Hope this helped :)
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Karri puts $1600 into an account that does not earn any interest. Every month
brilliants [131]

Answer:

1600 + 300n = balance

Step-by-step explanation:

n = number of months

1600 + 300(12) =

1600 + 3600 = 5200

5 0
3 years ago
Round each number to the nearest tenth.
GalinKa [24]
it's A because you put your Decimals in order and round the nearest tenths.
4 0
4 years ago
Read 2 more answers
Which model represents the factors of 4x2 – 9?
Gemiola [76]

4x^2-9


(2x+3)(2x-3)


To verify use distributed


2x(2x) +2x(-3)+3(2x)+3(-3)


4x^2-6x+6x-9


4x^2+0-9


4x^2-9

8 0
4 years ago
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Miles bought a 10 ounce bag of chips. He wants to know if it's really 10 ounces, so he uses a scale and makes four measurements.
photoshop1234 [79]
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4 0
3 years ago
Quadratic equations and complex numbers PLEASE HELPPPP ASAP
kondor19780726 [428]

we are given

27x^3-1=0

we can also write it as

(3x)^3-(1)^3=0

now, we can use factor formula

a^3-b^3=(a-b)(a^2+ab+b^2)

we can use above formula

we get  

(3x)^3-(1)^3=(3x-1)((3x)^2+3x\times 1+(1)^2)

now, we can simplify it

27x^3-1=(3x-1)(9x^2+3x+1)

now, we can set it to 0

27x^3-1=(3x-1)(9x^2+3x+1)=0

and then we can solve for x

(3x-1)(9x^2+3x+1)=0

3x-1=0

x=\frac{1}{3}

9x^2+3x+1=0

now, we can use quadratic formula

x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}

now, we can plug values

and we get

x=\frac{-3\pm \sqrt{3^2-4\cdot \:9\cdot \:1}}{2\cdot \:9}

x=-\frac{1}{6}+i\frac{\sqrt{3}}{6},\:x=-\frac{1}{6}-i\frac{\sqrt{3}}{6}

So, we will get solution as

x=\frac{1}{3},\:x=-\frac{1}{6}+i\frac{\sqrt{3}}{6},\:x=-\frac{1}{6}-i\frac{\sqrt{3}}{6}...............Answer

5 0
3 years ago
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