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3 years ago

Twenty-one is 35% of what number?

Mathematics

2 answers:

Mariulka [41]3 years ago

5 0

Answer:

Step-by-step explanation:

larisa86 [58]3 years ago

4 0

Answer:

The answer is sixty.

Step-by-step explanation:

In this problem, the number twenty-one represents the part.

So, let’s let x represent the unknown whole.

We can write a proportion showing that the ratio of the percent is equal to the ratio of the part to the whole.

Next, we find the cross products: thirty-five times x equals twenty-one times one hundred, and set cross products equal.

Now we can divide both sides of the equation by thirty-five.

Finally, we can simplify each side and find that the value of x is sixty.

So, twenty one is thirty-five percent of sixty.

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Write the set in roster form containing numbers -3, -2, -1, 0, and 1

Andrew [12]

Answer: Is the answer is A={-3,-2,-1,0}, I’m not sure if the owner who was written the answer, if it’s right I’ll have more points, if it’s wrong then let someone else answer okay? :)

Step-by-step explanation:

8 0

2 years ago

Decrease 1440 by 80%

mario62 [17]

Answer:

288 will be ur ans

Step-by-step explanation:

1440 x 80/100

=1152

1440-1152

=288

5 0

2 years ago

What is the range of this piecewise function

White raven [17]

Answer as a compound inequality: $-4 \le y < 2$

Answer in interval notation: [-4, 2)

=============================================

Explanation:

The range is the set of all possible y outputs of a function. When dealing with a graph like this, we just look at the highest and lowest points to determine which y values are possible.

The lowest point occurs when y = -4. We include this value. So far we have $y \ge -4$ which is the same as $-4 \le y$

The upper ceiling for the y value is y = 2. We can't actually reach this value because of the open hole at (-3,2). So we say that $y < 2$

Combine $-4 \le y$ and $y < 2$ to get the compound inequality $-4 \le y < 2$

This says y is between -4 and 2, including -4 but excluding 2.

To convert this to interval notation, we write [-4, 2) where the square bracket says to include the endpoint and the curved parenthesis says to exclude the endpoint.

6 0

2 years ago

The figure above shows a square inscribed in a rectangle.

slava [35]

Step-by-step explanation:

first u must find the area of the rectangle.after that,find the area of the square.then you have tu subtract it so that u can get the orange area.

8 0

2 years ago

What is the kinetic Energy of a 110 kg linebacker rushing towards his football

Leviafan [203]

Answer:

The Kinetic energy of the 110 kg linebacker is 1375 J

Solution:

The kinetic energy of an object is the energy produced by its velocity. Kinetic energy of an object is directly proportional to the mass and the square of the its velocity.

Therefore, the formula for kinetic energy is

$KE=\frac{1}{2} \times m v^{2}$

Here, The linebacker’s mass m = 110 kg

The linebacker’s velocity v = 5 m/s

So by substituting the values,

The kinetic energy of linebacker is

$K E=\left(\frac{1}{2} \times 110 \times 5 \times 5\right) \text { Joules } \\\\ \Rightarrow (\frac{2750}{2}) Joules = 1375 Joules$

3 0

2 years ago