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Lunna [17]
3 years ago
7

Simplify the following expression: 12a+9b2a-13a2b2+4ab2-16a

Mathematics
2 answers:
Rudiy273 years ago
8 0
12a+9b^2a-13a^2b^2+4ab^2-16a= \\ =12a-16a+9ab^2+4ab^2-13a^2b^2= \\ =-4a+13ab^2-13a^2b^2= \\ =a(-4+13b^2-13ab^2)
Elenna [48]3 years ago
6 0
12a + 9ab² - 13a²b² + 4ab² - 16a
12a - 16a + 9ab² + 4ab² - 13a²b²
-4a + 13ab² - 13a²b²
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How to solve this question ​
yarga [219]

Answer:

BC = 3.6

Step-by-step explanation:

Since the triangles are similar then the ratios of corresponding sides are equal, that is

\frac{BC}{DE} = \frac{AC}{AE} , substitute values

\frac{BC}{1.2} = \frac{4.5}{1.5} ( cross- multiply )

1.5 BC = 5.4 ( divide both sides by 1.5 )

BC = 3.6

6 0
3 years ago
80% of what how many games is 32 games?
Talja [164]
40 games would be 100% if 32 games is 80%
6 0
2 years ago
An arithmetic sequence begins as follows: a1=13 a2=19 Which of the following gives the definition of its nth term?
Otrada [13]

Answer:

the nth term of the sequence is a_n=6n+7

Step-by-step explanation:

Given : An arithmetic sequence begins as follows: a_1=13, a_2=19

To find : Which of the following gives the definition of its nth term?

Solution :

The nth term of the A.P is a_n=a+(n-1)d

The first term is a=a_1=13

The common difference is d=a_2-a_1

d=19-13=6

Substitute in the formula,

a_n=13+(n-1)6

a_n=13+6n-6

a_n=6n+7

Therefore, the nth term of the sequence is a_n=6n+7

5 0
3 years ago
Plsssssss can someone help me
77julia77 [94]

Answer:

2^3 = 8

Step-by-step explanation:

2*2*2 = 8

16 - 8 = 8

8 / 2 = 4

4 + 9 = 13

13 may be your answer

5 0
2 years ago
Read 2 more answers
Find the perimeter of a square with side a. Are the perimeter of the square and the length of its side directly proportional qua
inna [77]

The perimeter of a square with side a = 7.2 cm is 28.8 cm. Yes there exists a direct proportional relationship between Side length and Perimeter of square

<h3><u>Solution:</u></h3>

Given that side of square "a" = 7.2 cm

We have to find the perimeter of square

<em><u>The perimeter of square is given as:</u></em>

Perimeter of square = 4a

Where "a" represents the length of side of square

Substituting the given value a = 7.2 cm in above formula, we get perimeter of square

Perimeter of square = 4(7.2) = 28.8 cm

<em><u>Are the perimeter of the square and the length of its side directly proportional quantities?</u></em>

\begin{array}{l}{\text { perimeter of square }=4 a=4 \times \text { length of side }} \\\\ {\frac{\text { perimeter of square }}{\text { length of side }}=4}\end{array}

The Perimeter is equal to a constant times the Side length, or the Perimeter divided by the Side length is equal to four. So this is definitely a proportional relationship between Side length and Perimeter.

Two values are said to be in direct proportion when an increase in one results in an increase in the other.

So when length of sides increases, perimeter also increases

Hence perimeter and length of side of square are directly propotional quantities

4 0
3 years ago
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