3 years ago

Using the numbers 8,6,4, and 2 write and expression that equals 20

Mathematics

1 answer:

alisha [4.7K]3 years ago

3 0

Add all four numbers together:

8 + 6 + 4 + 2 = 20

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Score: 4 of 8 pts

pochemuha

Answer:

10.5 ft high

5.3 ft horizontally

Step-by-step explanation:

The equation can be written in vertex form to answer these questions.

f(x) = -0.2(x² -10.5x) +5

f(x) = -0.2(x² -10.5x +5.25²) +5 +0.2(5.25²)

f(x) = -0.2(x -5.25)² +10.5125

The vertex of the travel path is (5.25, 10.5125).

The maximum height is 10.5 feet, which occurs 5.3 feet (horizontally) from the point of release.

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Step-by-step explanation:

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kodGreya [7K]

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-90

Step-by-step explanation:

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4 years ago

The question is this: Rationalize the denominator and simplify.

Neko [114]

9514 1404 393

Answer:

$\dfrac{20+5\sqrt{3}}{13}$

Step-by-step explanation:

Multiply numerator and denominator by the "conjugate" of the denominator.

$\dfrac{5}{4-\sqrt{3}}=\dfrac{5(4+\sqrt{3})}{(4-\sqrt{3})(4+\sqrt{3})}=\dfrac{20+5\sqrt{3}}{4^2-(\sqrt{3})^2}=\boxed{\dfrac{20+5\sqrt{3}}{13}}$

This is done in different scenarios in order to take advantage of the factoring of the difference of squares. Square root terms and imaginary terms in the denominator can be eliminated in this way.

a² - b² = (a -b)(a +b)

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QuestioEvaluate the given expression if a = -2 and b = 5.

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