2 years ago

Help its math again i forgot how to do it theres 2

Mathematics

1 answer:

Scilla [17]2 years ago

5 0

Answer:

first is 6/8 and second is 7/8

Step-by-step explanation:

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How many steel rods are in a staircase frame with 12 steps?

kolbaska11 [484]

180 steel rods to be exact

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2 years ago

Supplementary angles always add up to 180 degrees. TRUE OR FALSE

erica [24]

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yes this is true.

Supplementary angles always add up to 180°.

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2 years ago

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In a production process, the probability of manufacturing a defective rear view mirror for a car is 0.075. Assume that the quali

Leviafan [203]

Answer:

The probability that the 3rd defective mirror is the 10th mirror examined = 0.0088

Step-by-step explanation:

Given that:

Probability of manufacturing a defective mirror = 0.075

To find the probability that the 3rd defective mirror is the 10th mirror examined:

Let X be the random variable that follows a negative Binomial expression.

Then;

$X \sim -ve \ Bin (k = 3 , p = 0.075)\\ \\ P(X=x)= \bigg (^{x-1}_{k-1}\bigg)\times P^k\times (1-P)^{x-k}$

$= \bigg (^{10-1}_{3-1}\bigg)\times 0.075^3\times (1-0.075)^{10-3}$

$= \bigg (^9_2\bigg)\times 0.075^3\times (1-0.075)^{7}$

$= \dfrac{9!}{2!(9-2)!}\times 0.075^3\times (0.925)^{7}$

$= \dfrac{9*8*7!}{2!(7)!}\times 0.075^3\times (0.925)^{7}$

= 0.0087999

≅ 0.0088

5 0

2 years ago

How do I do This math....-2.5-(-3.25)=

zhannawk [14.2K]

When you subtract a negative, it changes it to adding a positive.

= -2.5 - (-3.25)

= -2.5 + 3.25

= 0.75

Hope This Helped! Good Luck!

3 0

2 years ago

Find 6% of $5.65 and round the product to the nearest cent.

Leviafan [203]

Answer:

$0.34

Step-by-step explanation:

a = p*w

a = .06*5.65

a = 0.339

rounded = 0.34

hope this helps :)

8 0

3 years ago

Help its math again i forgot how to do it theres 2​

Help its math again i forgot how to do it theres 2