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Mathematics

1 answer:

insens350 [35]3 years ago

7 0

Answer:

31.25% of Mr. Marcum's students have more than two siblings

Step-by-step explanation:

First count the total amount of students Mr. Marcum has (number of dots on the chart) then count how many have more than two siblings.

Total: 16

>2 siblings: 5

Now divide 5 over 16 and move the decimal to the right two places to find what percent of students have more than two siblings.

5/16=0.3125

move the decimal and the answer is 31.25%

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Simplify the expression (4-5i)(2+6i)-(3-2i) show your work.

Anastaziya [24]

The simplification of the given expression $(4-5i)(2+6i)-(3-2i)$ , we get $-30i^2+16i+5$ .

Given expression is:

$(4-5i)(2+6i)-(3-2i)$

By applying the multiplication, we get

→ $(8-10i+24i-30i^2)-(3-2i)$

By multiplying the (-) sign into the bracket, we get

→ $8-10i+24i-30i^2-3+2i$

→ $5+16i-30i^2$

By arranging the terms, we get

→ $-30i^2+16i+5$

Thus the answer above is right.

Learn more:

brainly.com/question/19593573

4 0

3 years ago

Read 2 more answers

Find S5 for the sequence 3, 13, 23, 33, 43, 53, 63, 73.

hoa [83]

have an arithmetic sequence here....to find the common difference, subtract the first term from the second term. 13 - 3 = 10...so basically, ur adding 10 to each number to get to the next number.

before we find s5, we r going to find a5...because we need a5 to use in the sum formula.....a5 is the fifth term, and it is 43

sn = (n (a1 + a5) / 2
s5 = (5 (3 + 43) / 2
s5 = (5 (46)) / 2
s5 = 230/2
s5 = 115 <===

or, for this particular problem, s5 is the sum of the first 5 terms.
3 + 13 + 23 + 33 + 43 = 115.....u can do it this way for s5...but if u were asked to find s20, I suggest using the formula.

3 0

4 years ago

A square has an area of 64 ft? What is the length of each side?

exis [7]

Answer:

8 ft.

Step-by-step explanation:

The formula for area of a square is:

$A=s^2$