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4 years ago

Expand (a – 1)(a – 2) by using the FOIL method.

Mathematics

1 answer:

ddd [48]4 years ago

4 0

The answer is A.

(a-1)(a-2)

a * a= a^2
a * -2= -2a
a * -1 = -1a = a
-1 * -2 = 2 because two negative signs make a positive.

Put them together:

a^2 - 2a - a + 2
= a^2 - 3a +2

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On Friday, a local hamburger shop sold a combined total of 333 hamburgers and cheeseburgers. The number of cheeseburgers sold wa

scZoUnD [109]

111 hamburgers were sold, and 222 cheeseburgers were sold.

111 + 222 = 333, the total number of burgers sold.

Your answer is 111 for hamburgers sold.

4 0

3 years ago

Kimberly and Mike have an equal amount of money. After Kimberly spent $50 and Mike spent $25, Mike's money is 50% more than Kimb

Paul [167]

Answer:

Kimberly and Mike had at first $100 each

Step-by-step explanation:

Assume that Kimberly and Mike each have $x

∵ Kimberly has $x

∵ Kimberly spent $50

- Find the reminder with Kimberly by subtracting 50 from x

∴ The money left with Kimberly = x - 50

∵ Mike has $x

∵ Mike spent $25

- Find the reminder with Mike by subtracting 25 from x

∴ The money left with Mike = x - 25

∵ Mike's money is 50% more than Kimberly's money

- That means Mike's money is more than Kimberly's money by

50% of Kimberly's money

∴ x - 25 = (x - 50) + 50%(x - 50)

∵ 50% = $\frac{50}{100}$ = 0.5

∴ x - 25 = (x - 50) + 0.5(x - 50)

- Simplify the right hand side

∴ x - 25 = x - 50 + 0.5x - 25

- Add the like terms in the right hand side

∴ x - 25 = 1.5x - 75

- Add 75 to both sides

∴ x + 50 = 1.5x

- Subtract x from both sides

∴ 50 = 0.5x

- Divide both sides by 0.5

∴ 100 = x

∵ x represents the amount of money that Kimberly and

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∴ Kimberly and Mike had at first $100 each

7 0

3 years ago

360 is increased by 25%. The result is then decreased by 50%. What is the final number?

Jet001 [13]

Answer:

225

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

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There are usually 16 games in a football season.
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There are 27 combinations of outcomes.

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3 years ago

Show that the equation x cubed + 8x = 30 has a solution between x = 2.2 and x =2.3 ?

tatuchka [14]

$x^3+8x=30\\
x^3+8x-30=0\\\\
2.2^3+8\cdot2.2-30=10.648+17.6-30=-1.752\\
2.3^3+8\cdot2.3-30=12.167+18.4-30=0.567
$

For $x=2.2$ the value of $x^3+8x-30$ is negative, and for $x=2.3$ the value is positive which means between $x=2.2$ and $x=2.3$ there is an x for which the value of $x^3+8x-30$ is equal to 0 and therefore there is a solution.

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3 years ago