Factorise&expanding Can you factorise 81n-45

Mathematics

1 answer:

Nat2105 [25]3 years ago

5 0

9(9n-5)
9=0 9n-5=0
9n=5
9/5 is the answer and 0 or 9(9n-5)

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Can someone help me without links or files<br> answer all the questions

aliina [53]

Answer:

#1: 10 bags

#2: 5 1/2 pounds

#3: 5 bags

Step-by-step explanation:

for number one you just count all the x

for number two I added all the pounds of the bags

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3 years ago

Multiply. -8. -9/3 . 2/-5Write your answer in simplest form.

oee [108]

$(-8)\cdot(-\frac{9}{3})\cdot(-\frac{2}{5})$

To multiply these numbers, the first step is to writhe "-8" as an improper fraction, to do so, divide it by 1

$(-\frac{8}{1})\cdot(-\frac{9}{3})\cdot(-\frac{2}{5})$

Next is to solve the multiplication, to do so, first multiply the first two terms of the multiplication:

$(-\frac{8}{1})\cdot(-\frac{9}{3})$

The multiplication is between two negative numbers, when you multiply two negative numbers, the minus signs cancel each other and turn into a positive value, this is called "double-negative"

$(-\frac{8}{1})\cdot(-\frac{9}{3})=\frac{8\cdot9}{1\cdot3}=\frac{72}{3}$

Next multiply the result by the third fraction -2/5

This time you are multiplying a positive and a negative number, so the result of the calculation will be negative

$\frac{72}{3}\cdot(-\frac{2}{5})=-\frac{72\cdot2}{3\cdot5}=-\frac{144}{15}$

Final step is to simplify the result, both 144 and 15 are divisible by 3, so divide the numerator and denominator by 3 to simplify the result to the simplest form: