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3 years ago

HELP!!!! I WILL GIVE BRAINLIEST TO THE FIRST ANSWER!!!!!!!

Mathematics

1 answer:

aleksklad [387]3 years ago

3 0

I would say c. I’m not sure if I’m right if I’m not sorry but good luck

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Find the surface area of the square pyramid

mojhsa [17]

Answer:

4. 56 ft²

Step-by-step explanation:

SA = (4×4)+(4×½×4×5)

= 16+40

= 56

6 0

3 years ago

A small combination lock on a suitcase has 3 wheels, each labeled with the 10 digits from 0 to 9. If an opening combination is

Artyom0805 [142]

Answer:

0.14% probability of a person guessing the right combination

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

The order in which the numbers are selected is important. For example, 1,3,2 is a different combination than 3,1,2. So we use the permutations formula to solve this question.

Permutations formula:

The number of possible permutations of x elements from a set of n elements is given by the following formula:

$P_{(n,x)} = \frac{n!}{(n-x)!}$

Desired outcomes:

One right combination, so $P = 1$

Total outcomes:

10 numbers from a set of 3. So

$P_{(10,3)} = \frac{10!}{(10-3)!} = 720$

What is the probability of a person guessing the right combination?

$p = \frac{D}{T} = \frac{1}{720} = 0.0014$

0.14% probability of a person guessing the right combination

5 0

4 years ago

What divided by 80 equals 70?

xeze [42]

X/80 = 70
x = 80x70
x = 5,600

7 0

3 years ago

Read 2 more answers

Can someone help w/ math plz asap

slava [35]

somebody help this person

7 0

3 years ago

Read 2 more answers

What constant term should be added to both sides to complete the square on the left side?

grandymaker [24]

Answer:

9/64

Step-by-step explanation:

Given

x² - 3/4x + _____ = 10

Need to complete square on the left side of equation

The square should be in the form of:

(a + b)² = a² + 2ab + b²

We see a = x therefore

2b = -3/4, so
b = -3/8 and
b² = (-3/8)² = 9/64

So the missing constant term is 9/64

6 0

3 years ago