All categories

3 years ago

If you can could you help with 27-30 please

Mathematics

1 answer:

neonofarm [45]3 years ago

3 0

Answer:

27. 98% of 15 is 14.7 (rounding to the nearest tenth, this would be 15)

28. 250% of 25 is 62.5 (rounding to the nearest tenth, this would be 63)

29. 108% of $50 is $54

30. 75.2% of 130 is 97.76 (this would be 98)

Step-by-step explanation:

You might be interested in

PLS HELP , I GOT ONLY ONE RIGHT AND THE REST ARE WRONG. I dont know what to do anymore pls help , its due todayyy plsjnn

Eva8 [605]

So, you already know that angle CBD is 68 degrees, and the complementary angle to angle CBD is angle CBA. These angles together make 180 degrees because segment DBA is a straight line consisting of angles CBD and CBA. 180-68(the angle you already know) is 112 degrees for angle CBA. Then you repeat this process to find the other angles

6 0

3 years ago

Explain how you know these figures are similar

sergeinik [125]

Answer:

because of them is bigger than the other one so that means its differ but it has the same length

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Is it...

Art [367]

The transformations done are option A. A reflection over the y-axis, then a reflection over the x-axis

Step-by-step explanation:

Step 1:

First, we plot the points of triangle ABC and A''B''C''.

The points of triangle ABC are A (-8, -5), B(-4, -3), and C(-4,-7).

The points of triangle A''B''C'' are A'' (8, 5), B'' (4, 3), and C'' (4,7).

The points of both triangles ABC and A''B''C'' are the same values but different symbols for x and y values.

Step 2:

If a shape is reflected across an axis, the values remain the same but the symbols vary according to the quadrant.

If a shape is translated, all coordinates of all the points vary accordingly.

As triangles ABC and A''B''C'' have exactly the same coordinates it means that two reflections have occurred but no translations have occurred.

So the answer is the option with two reflections. So option A. A reflection over the y-axis, then a reflection over the x-axis is the answer.

4 0

3 years ago

Suppose that prices of recently sold homes in one neighborhood have a mean of $225,000 with a standard deviation of $6700. Using

elena55 [62]

Answer:

$211600 = 225000 -k*6700$

$k = \frac{225000-211600}{6700}= 2$

$238400 = 225000 +k*6700$

$k = \frac{238400-225000}{6700}= 2$

So then the % expected would be:

$1- \frac{1}{2^2}= 1- 0.25 =0.75$

So then the answer would be 75%

Step-by-step explanation:

For this case we have the following info given:

$\mu = 225000$ represent the true mean

$\sigma =6700$ represent the true deviation

And for this case we want to find the minimum percentage of sold homes between $211,600 and $238,400.

From the chebysev theorem we know that we have $1 -\frac{1}{k^2}$ % of values within $\mu \pm k\sigma$ if we use this formula and the limit given we have:

$211600 = 225000 -k*6700$

$k = \frac{225000-211600}{6700}= 2$

$238400 = 225000 +k*6700$

$k = \frac{238400-225000}{6700}= 2$

So then the % expected would be:

$1- \frac{1}{2^2}= 1- 0.25 =0.75$

So then the answer would be 75%

3 0

4 years ago

Which pair of rectangular coordinates represents the polar point R on the graph?

Brilliant_brown [7]

Before we can determine the rectangular coordinate of the point, let's determine first its polar coordinates. For this, we need two things: radius and angle.

For the radius, we see that point R is 4 units away from the center.

For the angle, we see that it is 30° clockwise or 330° counterclockwise. See the illustration below:

Now that we know the radius is 4 units and the angle is 330° counterclockwise, let's now convert this to rectangular coordinates.

Use the formula below:

For x-coordinate, we have:

$x=rcos\theta$ $\begin{gathered} x=4cos330\degree \\ x=2\sqrt{3} \end{gathered}$

For the y-coordinate, we have:

$y=rsin\theta$ $\begin{gathered} y=4sin330\degree \\ y=-2 \end{gathered}$

Therefore, the rectangular coordinate of the given polar point is (2√3, -2). Option B.

7 0

1 year ago