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3 years ago

There is a 30% probability of hail. What is the probability that it will NOT hail?

Mathematics

2 answers:

emmainna [20.7K]3 years ago

8 0

Answer:

70% probability

Step-by-step explanation:

100% probability

-30% probability

=70% probability

Aleonysh [2.5K]3 years ago

6 0

Since we’re taking from a whole of 100% every time, we just subtract the 30 from 100 and get 70%

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Math simplify (7a+5b-2c) + (5a+7b) + (2a-7c) + (2a-5b+3c) algebra

Alekssandra [29.7K]

Answer:

$-10a^2+25ab-15ac+12a+12b-2c$

Step-by-step explanation:

$(7a+5b-2c)+(5a+7b)+(2a-7c)+(2a-5b+3c)$

Distribute:

$=7a+5b-2c+5a+7b+(2a)(2a)+(2a)(-5)+(2a)(3c)+(-7a)(2a)+(-7a)(-5b)+(-7a)(3c)$

$=7a+5b-2c+5a+7b+4a^2-10ab+6ac-10a^2+35ab-21ac$

Combine all like terms:

$=(4a^2-14a^2)+(-10ab+35ab)+(6ac-21ac)+(7a+5a)+(5b+7b)+(-2c)$

$=-10a^2+25ab-15ac+12a+12b-2c$

6 0

3 years ago

The steamboat River Queen travels at the rate of 30km/h in still water. If it can travel 45 km up stream in the same amount of t

const2013 [10]

$x-the\ rate\ of\ the\ current\\t-time\\\\ \left\{\begin{array}{ccc}(30-x)t=45\\(30+x)t=63\end{array}\right\\ \left\{\begin{array}{ccc}t=\frac{45}{30-x}\\t=\frac{63}{30+x}\end{array}\right\\\\\frac{45}{30-x}=\frac{63}{30+x}\\\\cross\ multiply\\\\63(30-x)=45(30+x)\\1890-63x=1350+45x\\-63x-45x=1350-1890\\-108x=-540\ \ \ \ /:(-108)\\x=5\\\\Answer:The\ rate\ of\ the\ current\ is\ 5\ km/h.$

6 0

3 years ago

Sammy what is 8/x=5/9

Flura [38]

Answer:

72/5

Step-by-step explanation:

Multiply both sides of equation by x.

8= 5/9 x

Multiply both sides by 9/5.

8 times 9/5 = x

72/5 = x

5 0

3 years ago

90 3/10% as a decimal

andriy [413]

Answer:

90+3/10 over 100

Step-by-step explanation:

Hope this helped you

4 0

4 years ago

A cube has a volume of 125 cubic millimeters what is the length of each edge of the cube?

STatiana [176]

Cubic area = x^3 125 cube rooted is 5

4 0

4 years ago