**Answer:**

173.82cm²

**Step-by-step explanation:**

A=2(1+2)a2=2·(1+2)·62≈173.82338cm²

**Answer:**

see explanation

**Step-by-step explanation:**

Given the 2 equations

y = x² + 2x + 7 → (1)

y - 7 = x → (2)

Rearrange (2) expressing y in terms of x by adding 7 to both sides

y = x + 7 → (3)

Substitute y = x + 7 into (1)

x + 7 = x² + 2x + 7 ( subtract x + 7 from both sides )

0 = x² + x ← factor out x from each term

0 = x(x + 1)

Equate each factor to zero and solve for x

x = 0

x + 1 = 0 ⇒ x = - 1

Substitute these values into (3) for corresponding values of y

x = 0 → y = 0 + 7 = 7

x = - 1 → y = - 1 + 7 = 6

The solutions are

(- 1, 6 ) and (0, 7 )

Ariel travels 400 miles in 8 hours. What is her rate of change or rate?

The formula for rate is Distance = Rate * Time

400 miles = Rate * 8 hours

400 miles / 8 hours = Rate

Rate = 50 MPH

These two lines are parallel

You can use desmos

Option D:

**Solution:**

Given data:

Let the unknown degree be x.

To find the degree x:

Cancel the common factor 7 in the numerator and denominator.

**Using trigonometry basic formula,**

we know that .

So, x = 60°.

The unknown degree measure is 60°.

**Hence option D is the correct answer.**