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3 years ago

11

You are testing two food scales for accuracy by weighing two different types of foods.

1 answer:

vlabodo [156]3 years ago

5 0

Answer:

Sample 2.

Step-by-step explanation: Trust

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the diameter of a bicycle wheel is 0.7 meters. find the number of complete revolutions made by the wheel if the bicycle travels

larisa [96]

Answer:

$200\ rev$

Step-by-step explanation:

we know that

$1\ rev=2\pi r$ ----> circumference of a circle

step 1

Find the circumference of a circle

The circumference is equal to

$C=2\pi r$

we have

$r=0.7/2=0.35\ m$ ----> the radius is half the diameter

$\pi=22/7$

substitute

$C=2(22/7)(0.35)=2.2\ m$

step 2

Find the number of complete revolutions made by the wheel if the bicycle travels 440 meters

Divide the total distance by the circumference

$\frac{440}{2.2}=200\ rev$

7 0

3 years ago

Sam bought 2 1/5 pounds of carrots for 6.60$. what is the unit rate in cost per pound

Levart [38]

Answer:

The answer is 3.

Step-by-step explanation:

6 0

3 years ago

Graph a parabola whose x-intercepts are at x=-3 and x=5 and whose minimum value is y=-4

docker41 [41]

Answer:

(See explanation for further details)

Step-by-step explanation:

The standard equation of the parabola is:

$y + 4 = C \cdot (x-k)^{2}$

The formula is now expanded into a the form of a second-order polynomial:

$y + 4 = C\cdot x^{2} -2\cdot C\cdot k \cdot x +C\cdot k^{2}$

$y = C\cdot x^{2} - (2\cdot C \cdot k) \cdot x + (C\cdot k^{2}-4)$

The general equation of the second-order polynomial is:

$x = \frac{2\cdot C \cdot k \pm \sqrt{4\cdot C^{2}\cdot k^{2}-4\cdot C\cdot (C\cdot k^{2}-4)}}{2\cdot C}$

$x = k \pm \frac{\sqrt{C^{2}\cdot k^{2}-C^{2}\cdot k^{2}+4\cdot C}}{C}$

$x = k \pm 2\cdot \frac{\sqrt{C}}{C}$

$x = k \pm \frac{2}{\sqrt{C}}$

The equations to be solved are presented herein:

$-3 = k -\frac{2}{\sqrt{C}}$

$5 = k + \frac{2}{\sqrt{C}}$

Now, the solution of the system is:

$-3 +\frac{2}{\sqrt{C}} = 5 -\frac{2}{\sqrt{C}}$

$\frac{4}{\sqrt{C}} = 8$

$\sqrt{C} = \frac{1}{2}$

$C = \frac{1}{4}$

$k = 5 - \frac{2}{\sqrt{\frac{1}{4} }}$

$k = 1$

The equation of the parabola is:

$y = \frac{1}{4}\cdot (x-1)^{2} -4$

Lastly, the graphic of the function is included as attachment.

3 0

3 years ago

The value of a variable that satisfies a given algebraic equation

Sav [38]

Answer:

The value of the variable in an equation which satisfies the equation is called a Solution to the Equation.

example: So for example we take the equation 2n=10, If n = 1, the number of matchsticks is 2.

hope it helps

8 0

3 years ago

Need help fast!!!

Pavlova-9 [17]

Answer:

0

Step-by-step explanation:

0

5 0

3 years ago