I got 13 but you didn’t put any answer choices

Hi there! The answers are B and E.

To find our answer we first need to work out the parenthesis.

Now we can collect terms.

Hence, B is correct and A and C are false.

To determine whether D or/and E is/are correct we need to work out the parentheses as well. When we do that we can see D ending up with a negative value of n and E with a positive value of n. Taking into account our previous results, E is correct and D is false.

Hence, B and E are correct.

Solid is a substance that can be measured. The **required volume** of a solid is **90 cubic cm**

<h3>Volume of solids</h3>

The formula for calculating the **volume of a solid i**e expressed as:

V = lwh

l is the length

w is the width

h is the height

For th**e given figure;**

Volume = (11 * 2 * 3) + (2 * 3 * 4)

Volume = 66 + 24

Volume = 90 square cm

The **required volume** of a solid is **90 cubic cm**

Learn more on **volume of solid **here: brainly.com/question/21036176

#SPJ1

Answer:2.8%

Step-by-step explanation:

**Answer:**

Refer the digram & explanation.

**Step-by-step explanation:**

**<u>GIVEN :-</u>**

- Tangents PQ & PR drawn to a circle with center O from an external point P.

**<u>TO PROVE :-</u>**

**<u>CONSTRUCTION :-</u>**

**<u>FACTS TO KNOW BEFORE SOLVING :-</u>**

- (Angle at which tangents are inclined to each other from the external point) + (Angle the tangents subtend at the center of the circle) = 180°.

**<u>PROCEDURE :-</u>**

∠QPR + ∠QOR = 180°

⇒ ∠QOR = 180° - ∠QPR

In ΔQOR , OQ = OR (∵ Radii of the circle are equal)

⇒ ΔQOR is an isosceles triangle (∵ OQ = OR i.e. two sides of the triangle are equal.)

⇒ ∠OQR = ∠ORQ (∵ In an isosceles triangle , the base angles are equal)

So,

∠QOR + ∠OQR + ∠ORQ = 180°

⇒ ∠QOR + 2∠OQR = 180° (∵ ∠OQR = ∠ORQ)

⇒ 180° - ∠QPR = 180° - 2∠OQR (∵ ∠QPR + ∠QOR = 180°)

⇒ -∠QPR = -2∠OQR (∵ Cancelling 180° from both the sides.)

⇒ **∠QPR = 2∠OQR (Proved)**