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3 years ago

75. Simplify the expression: -2x(4x^2 - 5x + 3)

Mathematics

1 answer:

Karolina [17]3 years ago

3 0

-2x(4x² - 5x + 3) Distribute/multiply -2x into (4x² - 5x + 3)

(4x²)(-2x) - (5x)(-2x) + (3)(-2x)

-8x³ + 10x² - 6x

Your answer is the 3rd option

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The look out point of a lighthouse is 30 feet above sea level. A boat is 20 feet away from the base of the lighthouse. What is t

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I believe the answer is A

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3 years ago

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14. Jerry charges a fee of $45 plus $15 per hour to rent a motorbike. Write an equation to

satela [25.4K]

Answer:

5 hours, y= how much money it will cost, and x represents how many hours

Step-by-step explanation:

y= 15x+45

120= 15x+45

-45 -45

75= 15x

75/15×= 5 hours

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2 years ago

Solve for a: d=1/4a^2bc

Papessa [141]

a = $\sqrt{\frac{4d}{bc} }$

isolate the term in a

$\frac{1}{4}$ a²bc = d ( multiply both sides by 4 to eliminate the fraction )

a²bc = 4d ( divide both sides by bc )

a² = $\frac{4d}{bc}$

Take the square root of both sides

a = $\sqrt{\frac{4d}{bc} }$

6 0

3 years ago

Introduction to the triangle midsegment theorem‼️ can someone help me find BC,DE, and CE please ❓

Tasya [4]

Answer:

Part 1) $BC=68\ units$

Part 2) $DE=36\ units$

Part 3) $CE=34\ units$

Step-by-step explanation:

we know that

The <u><em>Midpoint Theorem</em></u> states that the segment joining two sides of a triangle at the midpoints of those sides is parallel to the third side and is half the length of the third side

Part 1) Find the length of BC

Applying the Midpoint Theorem

$DF=\frac{1}{2}BC$

we have

$DF=34\ units$

substitute the given value

$34=\frac{1}{2}BC$

solve for BC

$BC=34(2)=68\ units$

Part 2) Find the length of DE

Applying the Midpoint Theorem

$DE=\frac{1}{2}AC$

we have

$AC=72\ units$

substitute the given value

$DE=\frac{1}{2}(72)$

$DE=36\ units$

Part 3) Find the length of CE

we know that

$BC=CE+BE$ ----> by addition segment postulate

The point E is the midpoint segment BC

That means

$CE=BE$

$BC=2CE$

we have

$BC=68\ units$

substitute

$68=2CE$

solve for CE

$CE=68/2$

$CE=34\ units$

3 0

3 years ago

The circle above has a radius of 12 cm. what is the area of the circle?

Nataly [62]

Isn't the formula radius squared? So I'd be 12^2 = 12x12 = 144

4 0

3 years ago