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charle [14.2K]
2 years ago
5

Please help calc problem

Mathematics
2 answers:
lys-0071 [83]2 years ago
4 0
Please tell me what’s the question. So I can answer.
Yuliya22 [10]2 years ago
3 0
What’s the equation/problem?
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For what value of "x" will the expression -3*5*x have a positive answer"
balu736 [363]

The value of that expression is positive whenever 'x' is negative.


3 0
3 years ago
Hello please help thanks
Ilya [14]
My educational guess: Most likely Condensation, due to the fact that the in order for precipitation to happen (condensation must occur in short amount of time). Please know this is an educational guess and it may be wrong, you are risking your answer. And if you got it wrong because of me, I’m terribly sorry. God bless you and I hope this helped.
7 0
2 years ago
You have two parents, four grandparents, eight greatgrandparents, and so forth.
Leviafan [203]
A.
In the first generation we have 2 ancestors.
In the second generation we have 4 ancestors or 2^{2} ancestors.
In the third generation we have 8 ancestors ot 2^{3} ancestors.

We can see that each succesive generation has two times more members. The sum is:
2+4+8+16+...+ 2^{40}

To calculate number of ancestors we can use formula <span>for the sum of a geometric sequence. Geometric sequence is sequence of numbers that differ by a certain factor. This factor is called ratio. Formula is:
</span>S= a_{1} * \frac{1- r^{n} }{1-r}
<span>Where:
S -> sum
a1 -> first member of a sequence
r -> ratio
n -> number of elements

For this question:
a1 = 2
r = 2
n = 40
</span>S= 2* \frac{1- 2^{40} }{1-2} =2 199 023 255 550
<span>
b.
1 generation = 25 years
40 generations = 40 * 25 = 1000 years

c.
Total number of people who have ever lived = </span>10^{10}
Number of ancestors in 40 generations = 2.2*10^{12}

The number of ancestors is greater than total number of people who have ever lived. This means that not all ancestors were distinct and that in each generation both men and women had children with more than one partner.
8 0
3 years ago
A hexagon has equal side lengths and angle measures. How many reflectional symmetry does the regular hexagon have?.
MatroZZZ [7]

The regular hexagon has 6 reflectional symmetries.

A regular hexagon has 6 congruent sides.

The number of sides of a polygon is the number of reflectional symmetry the polygon have.

Since the number of congruent sides of a regular hexagon is 6, then the regular hexagon has 6 reflectional symmetries.

Read more about reflectional symmetry at:

brainly.com/question/24584937

3 0
2 years ago
Read 2 more answers
5% of is 36<br> A. 72<br> B. 720<br> C. 7.2<br> D. 72.0
Shtirlitz [24]

Answer:

b. 720

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
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