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3 years ago

40 points!!!

Mathematics

2 answers:

natita [175]3 years ago

8 0

Answer: c

Step-by-step explanation:

apex

Nimfa-mama [501]3 years ago

3 0

Answer: B

Step-by-step explanation: I have no Idea if this is right but I’m just guessing that the answer is “B”.

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If a,b and c are numbers such that a:b:c = 2:3:5 and b= 30 then, find the sum of a+b+c ?

ladessa [460]

Answer:

100

Step-by-step explanation:

2:3:5

20:30:50

20 + 30 + 50 = 50 + 50 = 100

3 0

3 years ago

Can someone answer this question please please help me I really need it if it’s correct I will mark you brainliest .

sergey [27]

Step 1) Divide the figure into separate shapes

Long rectangle: 27 x 5

Triangle: 3 x 4

Middle rectangle: 15 x 7

Small rectangle: 6 x 3

Step 2) Find the area of each shape

Long rectangle: A = 27 x 5 = 135

Triangle: A = 1/2 x 3 x 4 = 6

Middle rectangle: A = 15 x 7 = 105

Small rectangle: 6 x 3 = 18

Step 3) Add all of the areas together

A = 135 + 6 + 105 + 18 = 264 square feet

Hope this helps! :)

8 0

4 years ago

HELP PLS 20 POINTS! I WILL MARK BRAINLIEST

Alex777 [14]

Answer:

I believe it is 2 for $5.08

Step-by-step explanation:

1.27 times 2 is 2.54

2.54 times 5 is 12.70

7 0

3 years ago

Read 2 more answers

Evaluate the expression for x = 23. x − 6 =

STALIN [3.7K]

If X = 23, the. 23 - 6 = 17.

6 0

3 years ago

A random variable follows the continuous uniform distribution between 160 and 340. Calculate the following quantities for the di

Firlakuza [10]

Answer:

a) 0.3889

b) 0.5

c) 0.8333

d) The mean is 250 and the standard deviation is 51.96.

Step-by-step explanation:

An uniform probability is a case of probability in which each outcome is equally as likely.

For this situation, we have a lower limit of the distribution that we call a and an upper limit that we call b.

The probability of finding a value of X higher than x is:

$P(X > x) = 1 - \frac{x - a}{b-a}$

The probability of finding a value of X between c and d is:

$P(c \leq X \leq d) = \frac{d - c}{b - a}$

The mean and the standard deviation are, respectively:

$M = \frac{a+b}{2}$

$S = \sqrt{\frac{b-a}^{2}{12}}$

A random variable follows the continuous uniform distribution between 160 and 340.

This means that $a = 160, b = 340$

$P(220 \leq X \leq 290) = \frac{290 - 220}{340 - 160} = 0.3889$

$P(160 \leq X \leq 250) = \frac{250 - 160}{340 - 160} = 0.5$

$P(X > 190) = 1 - \frac{190 - 160}{340 - 160} = 0.8333$

$M = \frac{160 + 340}{2} = 250$

$S = \sqrt{\frac{340 - 160}^{2}{12}} = 51.96$

The mean is 250 and the standard deviation is 51.96.

8 0

3 years ago