All categories

2 years ago

The diameter of a circle is equivalent to the

Mathematics

2 answers:

jasenka [17]2 years ago

6 0

Answer:

Step-by-step explanation:

The diameter of a circle is twice the radius, so the statement is false.

Sever21 [200]2 years ago

3 0

False

d=r(2)

not radius squared.

You might be interested in

What additional information do you need to prove that ∆AMD ≅ ∆CNB by the HL Theorem?

Maurinko [17]

(H)ypotenuse (L)eg, right-triangle theorem.

based on the provided graph, we know the hypotenuses are equal, thus the tickmarks, so H is true, now the L part, we only need either of the pair of legs to be equal DM = NB or AM = CN, if either one is true, we're golden.

8 0

3 years ago

this is formula manipulation, I'd appreciate if the steps were provided. only respond if you know how to get the answer, thank y

marissa [1.9K]

Answer:

r = 3V/(2πh²)
h = 3V/b²
r = 25/π cm ≈ 7.9577 cm
w = 15 cm

Step-by-step explanation:

1. Multiply both sides of the equation by the reciprocal of the coefficient of r.

$V\cdot\dfrac{3}{2\pi h^2}=r\\\\r=\dfrac{3V}{2\pi h^2}$

2. Multiply both sides of the equation by the reciprocal of the coefficient of h.

$V\cdot\dfrac{3}{b^2}=h\\\\h=\dfrac{3V}{b^2}$

3. Solve the circumference formula for r, then substitute the given information.

$C=2\pi r\\\\r=\dfrac{C}{2\pi}\qquad\text{divide by the coefficient of r}\\\\r=\dfrac{50\,\text{cm}}{2\pi}=\dfrac{25}{\pi}\,\text{cm}\approx 7.9577\,\text{cm}$

4. Solve the perimeter formula for width, the substitute the given information and do the arithmetic.

$P=2(L+W)\\\\\dfrac{P}{2}=L+W\qquad\text{divide by 2}\\\\\dfrac{P}{2}-L=W\qquad\text{subtract L}\\\\\dfrac{40\,\text{cm}}{2}-5\,\text{cm}=W=15\,\text{cm}$

_____

In general, solving for a particular variable involves "undoing" what has been done to the variable, usually in the reverse order. In part 4, the variable W has L added and the sum is multiplied by 2. We "undo" those operations, last operation first, by dividing by 2 and subtracting L.

The properties of equality say you can do what you like to an equation as long as you do the same thing to both sides of the equation. So, when we say "divide by 2", we mean "divide both sides of the equation by 2." Likewise, "subtract L" means "subtract L from both sides of the equation."

4 0

3 years ago

What is Decrease 90 by 1/2

devlian [24]

Answer:

Step-by-step explanation:

$\frac{1}{2}$ × 90 = 45

Decrease means to subtract the amount by 45, then

90 - 45 = 45

8 0

3 years ago

Read 2 more answers

Please help!! Needed ASAP!!

AnnZ [28]

1. Dan preheated the oven.
2. It reached the temperature he set it to.
3. Graph 1
4. Graph 3
5. A car eases into the highway and comes to a sudden stop and stays like that for a while. It begins to drive at the highway’s speed until it exits and stops at home.

I hope I helped!

7 0

3 years ago

Priya bought x grams of flour. Clare bought 3/8 more than that. Select one equation that represent the relationship between the

statuscvo [17]

Answer:

The relationship ship equation:

y = x + 3/8x

Step-by-step explanation:

Let 'x' be the grams of flour Priya bought

Let Clare bought 'y' grams of flour

As Clare bought 3/8 more than that.

y = x + 3/8x

Thus, the relationship ship equation:

y = x + 3/8x

3 0

3 years ago