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3 years ago

-1/2(-2x+4y) expand to write an equivalent expression and show work

Mathematics

2 answers:

DaniilM [7]3 years ago

5 0

Answer:

x-2y

Step-by-step explanation:

Vesna [10]3 years ago

4 0

Answer:

x-2y

Step-by-step explanation:

expand by multiplying each part of the paranthesis by -1/2

x-2y is the expanded expression

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2. Solve for b in the linear equation 6b - 24 = 3(5b - 2)

Step2247 [10]

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Step-by-step explanation:

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3 years ago

What is the slop of the line? slope = 1/3 slope = -3 slope = 3

Sladkaya [172]

Answer: slope = 3

Step-by-step explanation:

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3 years ago

A random sample of 20 houses selected from a city showed that the mean size of these houses is 1880 square feet with a standard

azamat

Answer:

Option C

Step-by-step explanation:

Given that for a random sample of 20 houses selected from a city showed that the mean size of these houses is 1880 square feet with a standard deviation of 320 square feet.

X, the sizes of houses is Normal

Hence sample mean will be normal with

Mean = 1880

and std dev = $\frac{320}{\sqrt{20} } \\=71.5542$

For 90% confidence interval critical value for t with degree of freedom 19 is

1.328

Confidence interval upper bound

= mean + margin of error

= $1880+1.328*71.55\\=1975$

Option C is right

3 0

4 years ago