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3 years ago

Group 1 A elements have similar properties because they

Mathematics

2 answers:

Delicious77 [7]3 years ago

7 0

D. Have the same number of valence electrons

marshall27 [118]3 years ago

4 0

Answer:

C. Need the same number of electrons to fill their valence shells

D. Have the same number of valence electrons

Step-by-step explanation:

Yes I know I answered a year late, the reason why I answered this is because so other people that have this question would know both of the correct choices. If you want to you could give this brainlest, you don't have to if you don't want. To be honest I don't really care if you do or not.

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Analyze the diagram below and complete the instructions that follow.

bija089 [108]

Given:

ABC is a right triangle.

Opposite of C = AB = 6

Adjacent of C = BC = 8

Hypotenuse = AC = 10

To find:

The value of sin C.

Solution:

Using basic trigonometric ratio formula:

$$\sin \theta = \frac{\text{Opposite of }\theta}{\text{Hypotenuse}}$

$$\sin C = \frac{\text{Opposite of C}}{\text{Hypotenuse}}$

$$\sin C = \frac{AB}{AC}$

$$\sin C = \frac{6}{10}$

Cancel the common factors.

$$\sin C = \frac{3}{5}$

The value of sin C is $\frac{3}{5}$ .

7 0

3 years ago

A candy bar cost the store $0.79. The store wants a 65% mark up. What would the price of the candy bar be to have a 65% mark up?

kozerog [31]

Answer:

1.30$

Step-by-step explanation:

5 0

3 years ago

Find the value of z, secant and tangent angles

NeTakaya

Answer:

z = 110

Step-by-step explanation:

The measure of an angle created by the intersection of two secants outside a circle is half the difference of the angles it intercepts. In this it would be:

2x + 15 = 1/2 * (10x + 20 - 80)

We can now solve:

4x + 30 = 10x - 60

30 = 6x - 60

6x = 90

x = 15

This means the values of 10x + 20 is 10(15) + 20, which is 170.

Now, we can add up all the arcs in a circle, which sum to 360 degrees:

360 = z + 170 + 80

360 = z + 250

z = 110

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