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4 years ago

Solve the equation for 2k = -10

Mathematics

2 answers:

Kisachek [45]4 years ago

8 0

Answer:

K=-5

Step-by-step explanation:

2(-5)=-10

larisa [96]4 years ago

3 0

Answer:

-5

Step-by-step explanation:

2k = -10 :Divide both sides by 2

2 2

(k = -5) : Your answer should be negative five

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James can buy 12muffins for $9.60 or 3 muffins for $2.70. Which is the better deal?

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Answer:

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Step-by-step explanation:

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3 years ago

The circumference of a circle is 30t. What is its area?

labwork [276]

Answer:

$A=\frac{225t^2}{\pi}$ given the circumference is 30t.

Step-by-step explanation:

The circumference of a circle is $C=2\pi r$ and the area of a circle is $A=\pi r^2$ assuming the radius is $r$ for the circle in question.

We are given the circumference of our circle is $2 \pi r=30t$ .

If we solve this for r we get: $r=\frac{30t}{2\pi}$ . To get this I just divided both sides by $2\pi$ since this was the thing being multiplied to $r$ .

So now the area is $A=\pi r^2=\pi (\frac{30t}{2 \pi})^2$ .

Simplifying this:

$A=\pi (\frac{30t}{2 \pi})^2$ .

30/2=15 so:

$A=\pi (\frac{15t}{\pi})^2$ .

Squaring the numerator and the denominator:

$A=\pi (\frac{(15t)^2}{(\pi)^2}$

Using law of exponents or seeing that a factor of $\pi$ cancels:

$A=\frac{(15t)^2}{\pi}$

$A=\frac{15^2t^2}{\pi}$

$A=\frac{225t^2}{\pi}$

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3 years ago

Find the lowest common multiple (LCM) of 15 and 30. A) 5 B) 15 C)30 D)60

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Answer:

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3 years ago

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Answer:

Step-by-step explanation:

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4 years ago

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Step-by-step explanation:

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1/2×14×6

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3 years ago