3 years ago

Factor this expression 12z+28-7z-3

Mathematics

1 answer:

Stella [2.4K]3 years ago

6 0

5z+25 is the answer i hope this helps you like my comment

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Sally owns a souvenir shop that is open 5 days a week. One week she sold about 150 T-shirts. Which of the following sets of numb

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Sally is a bit ugly

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3 years ago

What is the first step in solving the equation 3,5n+6.4 = 42.5?

solong [7]

Answer:

subtract 6.4

Step-by-step explanation:

what you have to do is isolate the variable, (n), so get rid of the 6.4 from each side, then divide both sides by 3.5

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3 years ago

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Evaluate the series: 2-10+50-250..., n=8

garik1379 [7]

The sum of first 8 terms of series is -130208

Solution:

Given that,

2 - 10 + 50 - 250 , ....

n = 8

Find the common ratio between a term and its previous term

$r = \frac{-10}{2} = -5\\\\r = \frac{-250}{50} = -5$

Thus common ratio is same

This is a geometric series

The sum of terms of geometric sequence is given as:

$S_n = \frac{a_1(1-r^n)}{1-r}$

Where,

r is the common ratio

n is the nth term

$a_1$ is the first term of series

From series,

$a_1 = 2\\\\r = -5\\\\n = 8$

Therefore,

$S_8 = \frac{2 \times (1 - (-5)^8)}{1-(-5)}\\\\S_8 = \frac{2 \times (1-390625)}{6}\\\\S_8 = -130208$

Thus sum of first 8 terms of series is -130208

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4 years ago

Log2(62) in natural logarithm

Blizzard [7]

Answer:

Step-by-step explanation:

Use the change-of-base rule.

log₂(62) = ln(62)/ln(2)

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4 years ago

Simplify –2x3y × xy2.

adell [148]

Answer: B. -2x^4y^3

Step-by-step explanation:

Multiply the variables by each other.

-2x^3 * x = -2x^4

y * y^2 = y^3

7 0

3 years ago

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