It is difficult to change how good I am at math even if I try hard and practice a lot.

Mathematics

2 answers:

natulia [17]3 years ago

8 0

Answer:

Step-by-step explanation:

vodomira [7]3 years ago

5 0

Answer:

Step-by-step explanation:

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Given the Arithmetic series A1+A2+A3+A4

natali 33 [55]

Answer:

$S _{19} = 760$

Step-by-step explanation:

$a1 = 13 \\ a2 = 16 \\ d = a2 - a1 = 16 - 13 = 3 \\ d = 3 \\ a _{n} = l = 67 \\$

now,

$a _{n} = a + (n - 1) \times d \\ 67 = 13 + (n - 1) \times 3 \\ 67 = 13 + 3n - 3 \\ 67 - 13 + 3 = 3n \\ 57 = 3n \\ 3n = 57 \\ \\ n = \frac{57}{3} \\ \\ n = 19$

now the sum of the numbers

$S _{n} = \frac{n}{2} (a + l) \\ \\ S _{19} = \frac{19}{2} (13 + 67) \\ \\ S _{19} = \frac{19}{2} (80) \\ \\ S _{19} = \frac{19}{2} \times 80 \\ \\ S _{19} = 19 \times 40 \\ S _{19} = 760$

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3 years ago

Write a<br> rule that could be used to simplify the square of any square root of a number.

Vlada [557]

Product rule- the first rule for simplifying square roots, which allows us to separate the square root of a product of two numbers into the product of two separate rational expressions

HOPES THIS HELP :)

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3 years ago

What is the first step toward reconciling your checkbook register?

maks197457 [2]

Answer:

You need to record interest earned :)

Step-by-step explanation:

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If angle m=25 and angle l=25 find jkm

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