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lubasha [3.4K]
3 years ago
11

what value in place of the question mark makes the polynomial below a perfect square trinomial? 9x2+?x+49

Mathematics
2 answers:
Alchen [17]3 years ago
3 0

the missing number should be the square root of the last number times 2 for a perfect trinomial

 so square root of 49 = 7

7*2 =14

 so the missing number should be 14

 

swat323 years ago
3 0
U take the sqrt of the first term, which happens to be 3x...then u take the square root of the 3rd term, which is 7, then u multiply that product by 2....
3x * 7 = 21x.....21x * 2 = 42x

lets check..
9x^2 + 42x + 49 = (3x + 7)^2...correct

so ur middle term will be 42x
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The legs of a 45-45-90 triangle have a length of 8 units. What is the length of one of its hypotenuse?
olya-2409 [2.1K]
To find the hypotenuse of a 45 45 90 triangle, multiply the leg by sq root (2)

8 * sqrt(2) =  8 * <span> <span> <span> 1.4142135624 </span> </span> </span>
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Source:
http://www.1728.org/trig2.htm



8 0
3 years ago
I’m a lil confused...help??!?
Olegator [25]

Answer:

the answer is b hope you have fun

7 0
3 years ago
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Whitepunk [10]

Answer:

Her monthly income=$1,082

Step-by-step explanation:

Step 1: Express the total monthly pay:

The total monthly pay can be expressed as follows;

A=F+(R×T)

where;

A=the total monthly income

F=fixed income per month

R=commission rate

T=total monthly sales

In our case;

F=$650 a week

R=6%=6/100=0.06

T=$7200

replacing;

A=650+(6% of 7,200)

A=650+(0.06×7,200)

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A=$1,082

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7 0
3 years ago
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Nastasia [14]

Answer:

cos x = 8/f.

Step-by-step explanation:

We can use the identity :

tan x = sin x / cos x.

Substituting:

e/8 = e/f / cos x

e/8 * cos x = e/f

cos x = e/f * 8/e

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8 0
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Anna35 [415]

the correct answer is C to this question

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