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denis23 [38]
3 years ago
13

I just need help with this

Mathematics
1 answer:
ella [17]3 years ago
8 0

The formula for area of a circle is: πr^2

r is half the diameter.

FE is the diameter: r = 20/2 = 10

Area of circle using FE = π10^2 = π * 100 = 314 square meters.

BE is a radius:

Area = π3.5^2 = π * 12.25 = 38.465  = 38.5 square cm ( rounded to nearest tenth).

AB is a radius:

Area = π11^2 = π * 121 = 379.94 = 380 square feet ( rounded off).

EF is a diameter

r = 12/2 = 6 meters

Area = π6^2 = π * 36 = 113.04 = 113 square meters ( rounded off).

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2. A student usually saves $20 per month. He would like to reach a goal of saving $350 in 12 months. The student writes the equa
Zigmanuir [339]

Answer:

x = 9.17 (nearest hundredth)

The variable x is the amount the student needs to save each month in addition to his usual saved amount of $20.

Step-by-step explanation:

350 = 12(x + 20)

Multiply out brackets:  350 = 12x + 240

Subtract 240 from both sides:  110 = 12x

Divide both sides by 12:  9 1/6 = x

x = 9.17 (nearest hundredth)

The variable x is the amount the student needs to save each month in addition to his usual saved amount of $20.

3 0
2 years ago
Can you guys help me find the value of x
Tanzania [10]

Answer: x= 54

Step-by-step explanation:mathhhhh

7 0
2 years ago
Expand (x-2)^7 using binomial theorem
Nastasia [14]

Answer:

x^7-14x^6+84x^5-280x^4+560x^3-672x^2+448x^2-128

Step-by-step explanation:

ends are x^7 and 120^7, and use the therom in the middle

5 0
2 years ago
Help help help help​
Butoxors [25]

Answer:

g=3

Step-by-step explanation:

f(g) = g^2 +3g

Let f(g) = 18

18 =  g^2 +3g

Subtract 18 from each side

18-18 =g^2 +3g-18

0 = g^2 +3g-18

Factor

0 = (g+6) (g-3)

Using the zero product property

g+6 =0    g-3 =0

g = -6      g =3

The only solution listed is g=3

5 0
3 years ago
What is the process 9.04 turning into 9.10?
Yuki888 [10]
You would add 0.06.

Hope This Helps You!
Good Luck Studying :)
3 0
2 years ago
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