3 years ago

If you need to divide 2/3 by 4/5 , why is it easier to use an equation than to use a model

Mathematics

1 answer:

Kryger [21]3 years ago

8 0

Now you see when you use a model it is harder kepause........

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2x minus y equals 6, x plus y equals negative 3

kap26 [50]

Answer:

y=-4, x=1

Step-by-step explanation:

2x-y=6 x+y=-3

2(-3-y)-y=6 x=-3-y

-6-2y-y=6 x=-3+4

-3y=12 x=1

y=-4

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3 years ago

Suppose a population has a mean weight of 180 pounds and a standard deviation of 25 pounds. a sample of 100 items is drawn from

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μ=180,σ=25,n=100

Therefore the standard error of the mean is

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$\frac{25}{\sqrt{100}}$

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Step-by-step explanation:

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4 years ago

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Joe ate 1/3 of a pizza and jane ate 1/5 of the pizza. How much of the pizza was eaten

NikAS [45]

Answer:

7/15

Step-by-step explanation:

If we're seeing how much pizza they both ate, we would add them together.

$\frac{1}{3}+\frac{1}{5}$

Find the common denominator

$\frac{5}{15}+ \frac{3}{15}$

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$\frac{7}{15}$

7/15 of the pizza was eaten

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A line that forms and 90° angle with the original line is:

Nikolay [14]

Answer:

a right angle

Step-by-step explanation:

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