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sweet [91]
3 years ago
12

I don't know how to do this :(

Mathematics
1 answer:
professor190 [17]3 years ago
5 0
Use the points and plug em into the  form

16 = ab^(-3)
a = 16*b^3

4 = ab^(-1)
4 = 16*b^(3)*b^(-1)
b^2=1/4     b =(1/4)^(1/2)
b=0.5

check the answer choices and you see that only the third one has b = 0.5
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Rectangle poster is 3 times as long as wide perimeter is 24 in
Alexxandr [17]

w= width

l = 3w

P = 2(l+w)

substitute

24 = 2(3w+w)

24 = 2(4w)

24 =8w

3 =w

The width is 3 inches

the length is 9 inches

3 0
4 years ago
108=-12 - 4 (-5n+7)I need help
Andrei [34K]

108 = -12 + -4(-5n + 7)

108 = -12 + (7 * -4 + -5n * -4)

108 = -12 + (-28 + 20n)

108 = -40 + 20n

-20n = -40 + -108

-20n = -148

n = 7.4

6 0
3 years ago
The circle has a diameter of 9 inches what is the circumference rounded to the nearest whole number
Sholpan [36]

Answer:

28

Step-by-step explanation:

Circumference = 2*pi*r

r = 1/2*diameter = 4.5

pi = 3.14

Circumference = 2*(3.14)*(4.5) = 28.26 = 28

8 0
3 years ago
SOMEONE HELP! I know the answer I just need to show the work.
gayaneshka [121]

okay so

117° + angle a = 180° (supplementary angle)

angle a = 180 - 117

= 63°

then angle a + angle b + 81° = 180° ( angle sum property)

so... 63° + angle b + 81° = 180

144 + angle b = 180°

angle b = 180 - 144

= 36°

hope this helps.

6 0
3 years ago
The low temperatures in degrees Fahrenheit in Marsh City during a week in January were: -3, -5, 3, 7, -2, -2, -5 What was the av
miskamm [114]

Answer:

-1

Step-by-step explanation:

You can find the average my finding the sum of all temperatures and then dividing it by the number of temperatures ( in this case 7)

So you get (-3-5+3+7-2-2-5)/7=-7/7=-1

4 0
4 years ago
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