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ahrayia [7]
3 years ago
13

Factorise fully the following: a) 3x^3-9x b) 4x^2+28^3

Mathematics
1 answer:
Leokris [45]3 years ago
3 0

Answer:

3 x(x^2-3)

4x(x^2+5488)

Step-by-step explanation:

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Please help look at picture. 26 points for helping
Mariana [72]
It's 21 square units. If you map it on a complex plane (x-axis is real numbers, y-axis is imaginary numbers) you'll see that the sides of the rectangle is 3 and 7 which multiply to 21.
4 0
3 years ago
Simplify 10 to the 6 power over 10 to the negative 3
dimulka [17.4K]
To simplify 10^6/10^-3 you first need to get rid of the negative exponents so you bring up 10^-3 so it becomes:
10^6x10^3 then all that you have to do is add the exponents since the bases for both are the same.
So the final answer is:
10^9
Or in other words:
10 to the power of 9
7 0
3 years ago
Among 21- to 25-year-olds, 29% say they have driven while under the influence of alcohol. Suppose that three 21- to 25-year-olds
Sophie [7]

Answer:

P(3) = 0.0244

P(3) = 2.44%

the probability that all three selected have driven while under the influence of alcohol is 2.44% or 0.0244

Step-by-step explanation:

Given;

The probability that they have driven while under the influence of alcohol is;

P = 29% = 0.29

the probability that all three selected have driven while under the influence of alcohol is;

P(3) = P × P × P

P(3) = 0.29 × 0.29 × 0.29

P(3) = 0.024389

P(3) = 0.0244

P(3) = 2.44%

the probability that all three selected have driven while under the influence of alcohol is 2.44% or 0.0244

5 0
3 years ago
140 fluid ounces increased by 45%
Stels [109]
Hello!

"Increase" means to add. We must find out what 45% of 140 fluid ounces is, and to do that we must first convert the percentage to a decimal and then multiply it by the amount of fluid ounces.

I know, that's probably a lot to take in! :D

45% ÷ 100 = 0.45 as a decimal

0.45 × 140 = 63

Add this to the amount of fluid ounces:

140 + 63 = 203

Final Answer:

203 fluid ounces.
5 0
3 years ago
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How many inches represent 1 mile? Convert the map scale to a unit rate. 3/10in = 7/8mi
mote1985 [20]
I think it is 1357inchs

8 0
3 years ago
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