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3 years ago

For each of the three ionic compounds, select which main group X belongs to. a.)X3PO4 b.)CaX2 c.)X2(SO4)3

1 answer:

4 0

A) First because it has a valency of +1

b) Seventh because it has a valency of -1

c) Third because it has a valency of +3

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For which of the following scatterplots is the correlation between x and y closest to −1 ?

Snezhnost [94]

Answer:

Scatter plot attached below.

Step-by-step explanation:

The correlation coefficient is a statistical degree that computes the strength of the linear relationship amid the relative movements of the two variables (i.e. dependent and independent).It ranges from -1 to +1.

If there is any alteration in the value of one variable, the value of the other variable is altered in a fixed proportion. The correlation amid them is known as perfect correlation.

In statistics, a perfect positive correlation is represented by +1 and -1 indicates a perfect negative correlation.

Negative correlation is a relationship amid two variables in which one variable rises as the other falls, and vice versa.

The scatter plot for the correlation between x and y closest to −1 is attached below.

4 0

4 years ago

If the measure of ZB is 40°, what measures can ZA and

lubasha [3.4K]

Answer: 30° and 110°

55° and 85°

70° and 70°

The sum of angles in a triangle is 180°. Therefore, since an angle has been given as 40°, the remaining angles will be:

= 180° - 40°

= 140°

Therefore,

30° + 110° = 140°

55° + 85° = 140°

70° + 70° = 140°

5 0

2 years ago

The area of a quadrilateral is 64 in^2. The length of the quadrilateral is 32 in. How wide is the quadrilateral?

Mars2501 [29]

Answer: 2 inches

Explanation: The area formula is length times width (L*w=a). We know that the area is 64in^2 (a=64) and the length is 32in (L=32), so we put those values into the equation and get 32*w=64. We then get w by itself by dividing both sides by 32, and get w=2. so the width is 2 inches.

7 0

3 years ago

The area of a square is numerically 45 more than the perimeter. find the length of the side

omeli [17]

Area of square = l²
Perimeter of square = 4l

According to the question,
$l^2 = 45 + 4l \\\\ l^2 - 4l - 45 = 0 \\\\ l^2 -9l+5l-45=0 \\\\ l(l-9)+5(l-9) =0 \\\\(l-9)(l+5)=0$

Using zero product property,

Either,
$l-9 = 0 \\
~~~~~~l = 9$

Or,
$l+5=0 \\
~~~~~~l=-5$

Since length can't be negative, the length is 9

4 0

3 years ago

The probability that you will get grounded if you have a bad grade is 85%. The probability that you will get grounded and have e

inna [77]

Is the answer 25? I'd like to buy a vowel for 50 please?

6 0

4 years ago

Read 2 more answers