the circle below

**Answer:**

area: 153.86

Circumference: 43.96 :D

**Step-by-step explanation:**

Salena needs to purchase 9 skirts for a new job. her friend, Jamie goes with her each of the skirts costs $41. Salena says that she can find the total cost by multiplying 9 and 4 and adding that to product of 9 and 1. Jamie disagrees and says that she needs to find the product of 9 and 40 and add that to the product of 9 and 1. Who is correct and why?

**Answer:**

Jamie is correct. This is because 41 is a combination of 40 and 1. Salena thinks that the 4 is just a 4, however, the 4 is in the tens place, so the 41 without the 1 is 40. The answer to this 41 times 9 is 369. Not 45.

**Step-by-step explanation:**

Each skirt is $41

Salena needs 9

(9*40) + (9*1)

360 + 9

$369

BI

Challenge 2

A: Can you find the

area of the circle?

r=x +1

B: Can you find the

circumference of

the circle?

**Answer:**

Area of the circle = pi * r^2 = pi * (x+1) ^ 2

Circumference of the circle = 2* pi * r = 2*pi*(x+1)

(-8) X 2/3 i NEED the answer help me

-5.33333333333

I used a calulator can I get brainliest please

Tell whether the sum is positive, negative, or zero without adding them.

-8 + 20

**Answer:**

The sum is positive.

**Step-by-step explanation:**

The 20 is a far greater value than -8, so no matter what, when you add them the sum will be positive. Though this would not be the same were the -8 greater than -20.

Hope this helps!

You are playing a video game. For each diamond you collect, you earn 110 points. You also earn 80 bonus points by completing the level in less than 2 minutes. You need to earn more than 1620 points to continue on to the next level. Write and solve an inequality that represents the numbers d of diamonds you must collect in less than 2 minutes to advance to the next level.

**Answer:**

110d + 80 > 1620

d > 14

**Step-by-step explanation:**

The** amount of points from collecting diamonds can be represented by 110d,** since you get 110 points for each diamond, d

**Add 80 to this** to represent the bonus points.

Use a greater than inequality, because you have to get **more than 1620 points.**

**Put this all together:**

110d + 80 > 1620

**Then, solve for d:**

110d + 80 > 1620

110d > 1540

**d > 14**

So, you have to collect **more than 14 diamonds** in less than 2 minutes in order to advance to the next level.

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