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Sergeu [11.5K]
2 years ago
15

5.

Mathematics
1 answer:
Serhud [2]2 years ago
7 0
3•4=12
16-12=4

She has 4feet left
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What are the solutions?<br>8x^2-12x-23=-5​
erastova [34]

Answer:

x = 3/4 + (3 sqrt(5))/4 or x = 3/4 - (3 sqrt(5))/4

Step-by-step explanation:

Solve for x over the real numbers:

8 x^2 - 12 x - 23 = -5

Divide both sides by 8:

x^2 - (3 x)/2 - 23/8 = -5/8

Add 23/8 to both sides:

x^2 - (3 x)/2 = 9/4

Add 9/16 to both sides:

x^2 - (3 x)/2 + 9/16 = 45/16

Write the left hand side as a square:

(x - 3/4)^2 = 45/16

Take the square root of both sides:

x - 3/4 = (3 sqrt(5))/4 or x - 3/4 = -(3 sqrt(5))/4

Add 3/4 to both sides:

x = 3/4 + (3 sqrt(5))/4 or x - 3/4 = -(3 sqrt(5))/4

Add 3/4 to both sides:

Answer:  x = 3/4 + (3 sqrt(5))/4 or x = 3/4 - (3 sqrt(5))/4

4 0
3 years ago
How many committes of 3 people can be formed from 7 people order does not matter?
Phoenix [80]
You can form 2 and then you have the odd one out.
5 0
3 years ago
Find the volume of the prism.
wlad13 [49]

Answer:

what prism exactly?

Step-by-step explanation:

repost the question with the prism

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3 years ago
Find the area of the figure
Pavlova-9 [17]
Triangle
1+1+5=7
7×4=28
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rectangle
12×5=60

whole shape
60+12=72in squared
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3 years ago
I really need help someone
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with what english, science anything i no it all

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