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Alona [7]
2 years ago
6

Evaluate x2 + 12, when x = 3

Mathematics
1 answer:
anygoal [31]2 years ago
6 0

Answer:

18

Step-by-step explanation:

x = 3

2(3) + 12

6 + 12

18

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What is the value of a?
Anna007 [38]

Answer:

15 units

Step-by-step explanation:

By using the Pythagoras Theorem,

C^2 = A^2 + B^2

Substitute in the given values,

25^2 = a^2 + 20^2

625 = a^2 + 400

625 - 400 = a^2 + 400 - 400

a^2 = 225

a =  \sqrt{225}

= 15

Hope this too helped! ^^

I'd recommend watching a video or two on the topic of Pythagoras Theorem, if this explanation isn't clear enough.

5 0
1 year ago
Find the length of the leg. If your answer is not an integer, leave it in simplest radical form. answer asap pls
Nitella [24]
A 45-45 90 triangle has two lengths that are equal, and the hypotenuse is √2 times those lengths. 

Therefore: 
Let x = the length of a leg (doesn't matter which one, they are equal)
√2 * x = 24        Divide both sides by √2
x = 24 / √2        
To get the radical out of the denominator, multiply the right side by √2/√2
x = 24√2 / 2
x = 12√2      Answer is B
3 0
3 years ago
Read 2 more answers
Vol=1348.79cm³. What's X? (Height)
ale4655 [162]
V = PI x r^2 x H

1348.79 = 3.14 x 5.5^2 x H

1348.79 = 94.985 x h
h = 1348.79 / 94.985
h = 14.2 cm  ( round answer if needed)


4 0
3 years ago
Given the system of equations, what is the value of the system determinant?
weeeeeb [17]
2x + y = 8
x - y = 10
--------------add
3x = 18
x = 6

x - y = 10
6 - y = 10
-y = 10 - 6
-y = 4
y = -4

solution is : (6,-4)
6 0
3 years ago
Read 2 more answers
Which expression represents the combined area of the garden in square feet?
KATRIN_1 [288]
You don’t have any attachment so I’m sorry I cannot answer
8 0
3 years ago
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