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Mashcka [7]
3 years ago
14

Simplify (3a-2b)²-2(3a-2b)(a+2b)+(a+2)²​

Mathematics
2 answers:
mylen [45]3 years ago
7 0
2. 2
4a - 20ab + 12b. +4a + 4
Mnenie [13.5K]3 years ago
6 0

Answer: 4a2-20ab+12b2+4a+4

the 2 is squareing 4a and 12b

Step-by-step explanation:

expand move the parentheses

multiply the parentheses

collect like terms

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PLEASE HELP!!<br><br> what is the explicit formula for this sequence -7, -4, -1, 2, 5
trasher [3.6K]

Answer:

The explicit formula for the given expression is a_n=-10+3n.

Step-by-step explanation:

The given sequence is

-7, -4, -1, 2, 5

The difference between two consecutive terms is same, therefore the given sequence is an arithmetic sequence.

The first term of the given AP is -7 and the common difference is

-4-(-7)=-4+7=3

The explicit formula for an AP is

a_n=a+(n-1)d

Where, a is first term, d is common difference and n is number of terms.

Substitute a=-7 and d=3 in the above equation.

a_n=-7+(n-1)3

a_n=-7+3n-3

a_n=-10+3n

Therefore the explicit formula for the given expression is a_n=-10+3n.

6 0
3 years ago
There are two spinners. The first spinner has three equal sectors labeled 1, 2, and 3. The second spinner has four equal sectors
zhuklara [117]
<h3>Answer: A) 1</h3>

=========================

Explanation:

Let's label each pair of outcomes as an ordered pair (x,y)

x = first spinner outcome

y = second spinner outcome

We have these 12 different possible combos

(1,3),   (1,4),   (1,5),   (1,6)

(2,3),  (2,4),  (2,5),  (2,6)

(3,3),  (3,4),   (3,5),  (3,6)

Focus on the third column where y = 5 for each (x,y) pair. Of this column only (2,5) has x be an even number. The other results in that column have x be odd.

Basically (1,5) is the only possible outcome if we want the first spinner to lan on an even number, and the second spinner to land on 5.

7 0
3 years ago
Cathy earns $32 after babysitting for 5 hours. How much money does she earn per hour?
telo118 [61]
The answer would be $6.40
4 0
3 years ago
Read 2 more answers
The exterior angle measure of a regular polygon is 20 degrees. How many sides does the polygon have? 9 16 18 20
notka56 [123]
The polygon would have 18 sides. Hope this helps!
8 0
3 years ago
Read 2 more answers
Given that a = 10cm and b = 27cm work out theta rounded to one decimal place?
klemol [59]

Answer:

28.8

Step-by-step explanation:

A squared plus b squared equals c squared.

3 0
3 years ago
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