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antiseptic1488 [7]
3 years ago
14

Question 2

Mathematics
1 answer:
Masteriza [31]3 years ago
6 0
1.1, 0.10299, 0.1038, 0.9 im pretty sure
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A regular pentagon has side lengths of 14.1 centimeters and an apothem with length 12 centimeters. What is the approximate area
Katena32 [7]

Answer:

423 cm^2

Step-by-step explanation:

Area of a regular pentagon = Pa/2, where P = the perimeter and a = the apothem.

We can find the perimeter by

P = 5s where s is the side length since the pentagon is regular

P = 5( 14.1)

P = 70.5

A = P*a/2

   = 70.5 ( 12)/2

  =423 cm^2

7 0
3 years ago
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Which equation is equivalent to Two-thirds x minus StartFraction 5 Over 6 EndFraction = negative StartFraction 5 Over 12 EndFrac
Nitella [24]
262819 пыльцы службы
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3 years ago
If y = ax^2 + bx + c passes through the points (-3,10), (0,1) and (2,15), what is the value of a + b + c?
In-s [12.5K]

Hi there!

\large\boxed{a + b + c = 6}

We can begin by using the point (0, 1).

At the graph's y-intercept, where x = 0, y = 1, so:

1 = a(0)² + b(0) + c

c = 1

We can now utilize the first point given (-3, 10):

10 = a(-3)² + b(-3) + 1

Simplify:

9 = 9a - 3b

Divide all terms by 3:

3 = 3a - b

Rearrange to solve for a variable:

b = 3a - 3

Now, use the other point:

15 = a(2)² + 2(3a - 3) + 1

14 = 4a + 6a - 6

Solve:

20 = 10a

2 = a

Plug this in to solve for b:

b = 3a - 3

b = 3(2) - 3 = 3

Add all solved variables together:

2 + 3 + 1 = 6

5 0
3 years ago
Footlocker in the mall is having a 25% off sale on all tennis shoes. Joe paid $67.50 for his
marta [7]

Answer:

The original price of the shoes was $90.

Step-by-step explanation:

25% off means the price Joe paid for it is 75% of the original price.

Set up an equation:

75/100 = 67.50/x

Cross multiply

75 × x = 100 × 67.50

75x = 6750

x = 90

Check our work:

First solve for 25% off of 90 (our answer).

25% = 0.25

90 × 0.25 = 22.50

Next, subtract the discount from 90.

90 - 22.50 = 67.50

67.50 was what Joe paid so this is correct.

8 0
3 years ago
3/4 plus (1/3 divided by 1/6) minus (-1/2)
ANEK [815]

Answer:

just use photo math

Step-by-step explanation:

trust me all u have to do is takea pic and they awnser it for u u dont need points or anything so easy

7 0
3 years ago
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