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3 years ago

Multiply (2x + 5z)(7x - 6z) Simplify your answer.

Mathematics

1 answer:

Ugo [173]3 years ago

5 0

Hello!

Explanation:

Distributive property: a(b+c)=ab+ac

Multiply by the numbers.

Product it's going to be multiply by the numbers, fractions, decimals, factors, and multiples.

First, apply used their FOIL.

Foil: (a+b)(c+d)=ac+ad+bc+bd

2x*7x+2x(-6z)+5z*7x+5z(-6z)

Then you can also apply by the minus/plus sign.

2*7xx-2*6xz+5*7xz-5*6zz

And finally simplify by equation.

2*7xx-2*6xz+5*7xz-5*6zz

Answer: =14x²+23xz-30z²

Hope this helps!

-Charlie

Thanks!

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Read 2 more answers

The graph shows the type and number of coins that three students plan to donate during a coin drivefundraiser.Coin Drive Donatio

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Answer:

39 dimes

Explanation:

From the graph:

• Total number of nickels = 9+4+7=20

• Total number of dimes = 7+10+9 = 26

The ratio of total nickels to total dimes = 20:26

If the total number of nickels the students donate is increased to 30, we have:

$\frac{\text{Total Nickels}}{\text{Total Dime}}\colon\frac{20}{26}=\frac{30}{x}$

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2 years ago

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3 years ago

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4 years ago

population mean =72 and standard deviation =10, what is standard error of distribution of sample means for n=4 and n=25

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Answer:

The standard error of distribution for n = 4 is 5 and for n = 25 is 2.

Step-by-step explanation:

1. Let's review the information given to us for solving the question:

Population mean = 72

Standard deviation = 10

Sample₁ = 4

Sample₂ = 25

2. For finding the standard error of the mean, we use the following formula:

Standard error = Standard deviation / √Size of the sample

Standard error for Sample₁ = 10/√4

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3 years ago