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Alex
2 years ago
7

What is the value of 3x^2 + 5x + 25, when x = 3 (3x^2 means 3x squared)

Mathematics
1 answer:
pentagon [3]2 years ago
8 0
I got 67 but I can guarantee it’s right
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-2/5 - (-2/5) plz help il reward you
polet [3.4K]

zero

double - is actually plus

4 0
2 years ago
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Please help me guyys
algol13

Answer:

the answer is A! goodluck with hw thk

4 0
1 year ago
A brace for a shelf has the shape of a right triangle. Its hypotenuse is 10 inches long and the two legs are equal in length. Ho
vagabundo [1.1K]
This is a classic example of a 45-45-90 triangle: it's a right triangle (one angle of 90) & two other sides of the same length, which means two angles of the same length (and 45 is the only number that will work). With a 45-45-90 triangle, the lengths of the legs are easy to determine:
45-45-90
1-1-sqrt2
Where the hypotenuse corresponds to sqrt2.
Now, your hypotenuse is 10.
To figure out what each leg is, divide 10/sqrt2 (because sqrt2/sqrt2 = 1, which is a leg length in the explanation above).
Problem: you can't divide by radicals. So, we'll have to rationalize the denominator:
(10•sqrt2)/(sqrt2•sqrt2)
This can be rewritten:
10sqrt2/sqrt(2•2)
=10sqrt2/sqrt4
=10sqrt2/2
=5sqrt2 Hope this helps!!
3 0
3 years ago
What value of x will make the equation below true?<br> 5x = 12x – 28
mash [69]
X = 4
First take 12x off both sides, so -7x=-28
The negatives cancel out, so 7x=28
Not find the hcf and divide by that.
5 0
2 years ago
Read 2 more answers
Can some help me with this
myrzilka [38]

Answer:

x = 5

Step-by-step explanation:

4x = 1x + 15

subtract 1x from both sides

3x = 15

divide 3 from both sides

x = 5

3 0
3 years ago
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