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iVinArrow [24]
3 years ago
10

What is the first step in simplifying the expression?

Mathematics
1 answer:
andrezito [222]3 years ago
7 0
(9 - 7 X 3 + 4 )²
Always follow the rule
BIDMAS

Brackets
Indices
Division
Multiplication
Addition
Subtraction

First look at the Brackets
There are no indices in the brackets
There is no division in the brackets
There is a Multiplication in the brackets    7 x 3


For the answer

(9 - 7 x 3 + 4)²
Brackets
Multiplication   7 x 3 = 21
(9 - 21 + 4)²
Addition   -21 + 4 = -17
(9 - 17)² 
Subtraction    9 - 17 = -8
-8² 

Now start again once the brackets are gone
-8²
Indices
-8 x -8 = 64
     
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An arithmetic sequence has a1 = 22 and a8 = 43. Find a15.
brilliants [131]

The 15th term of the arithmetic sequence a_{15} = 64

Option B is correct

The nth term of an arithmetic sequence is given as:

a_{n} = a + (n - 1)d

The first value, a = 22

a_8 = a+(8 - 1)d\\a_8 = a + 7d

Since a_8 = 43

43 = 22 + 7d\\7d = 43 - 22\\7d = 21\\d = \frac{21}{7}\\d = 3

The common difference, d = 3

a_{15}= a + (15-1)d\\a_{15} = a + 14d\\a_{15} = 22 + 14(3)\\a_{15} = 22 + 42\\a_{15} = 64

The 15th term of the arithmetic sequence = 64

Learn more here: brainly.com/question/24072079

4 0
1 year ago
Will give barinliest. I need help Now.
Aloiza [94]

Answer:

im pretty sure its N = w^2 + 2w

hope this helps if it does plz brainliest :)

Step-by-step explanation:

4 0
3 years ago
What is the value of the expression below? 2[3(42+1)]-23
s2008m [1.1K]

Answer:

235

Step-by-step explanation:

42+1

43

3 times 43

129

129 times 2

258

258-23

235

4 0
2 years ago
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4. The area of the parallelogram<br>is 81.9 in? What is the height​
ipn [44]

Answer 96in2

Step-by-step explanation:

formula to find area = base x height

substitute the values

= 10 x 9

= 90 cm2

7 0
3 years ago
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iris [78.8K]

Answer:

x=4    y=6

Step-by-step explanation:

12 divide by 3 = 4

12 divide by 2 = 6

4 0
2 years ago
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