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Gelneren [198K]
4 years ago
7

If A = 3x^2 + 5x - 6 and B = -2x^2 - 6x + 7, then A - B equals

Mathematics
1 answer:
Anestetic [448]4 years ago
7 0
A=3x^2+5x-6 \\
B=-2x^2-6x+7 \\ \\
A-B= \\ 3x^2+5x-6-(-2x^2-6x+7)=\\
 3x^2+5x-6+2x^2+6x-7= \\ 5x^2+11x-13

The answer is (2).
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how many 5 letter combinations can be created from the letters in the world “friendly” assume that the order of the letters does
Artyom0805 [142]

Answer:

Number of combinations = 56

Step-by-step explanation:

Points to remember

nCₐ = n!/(r!(n - r)!)

The given word is "FRIENDLY"

F R I E N D L Y is a 8 letter word.

<u>To find the number of combinations</u>

5 letters can be selected from 8 letter = 8C₅

8C₅ = 8!/(8 - 5)!5!

 = 8!/3!5!

 = (8 * 7 * 6* 5!)/(1 * 2 * 3 * 5!)

 = 8 * 7

 =  56

5 letter combinations can be created from the letters in the world “friendly = 56

4 0
3 years ago
6 + (8 ÷ 2) - 2 + (4 - 1)
den301095 [7]

Answer:

11

Step-by-step explanation:

6 + (8 ÷ 2) - 2 + (4 - 1) =  

6 + 4 - 2 + 3 =

11

have a nice day! :)

7 0
3 years ago
Y = 3x - 5 what is the value of Y??
lara [203]

Answer:

41

Step-by-step explanation:

x=12

so y=3⋅12 +5

=36+5

=41

6 0
3 years ago
Read 2 more answers
One leg of a triangle has a measure of 24 units if the hypotenuse measures 25 units what is the lengh of the other leg
marusya05 [52]
If we assume this is a right triangle

 for a right triangle
if it has legs length a and b and hyptonouse c then
a²+b²=c²

given
a leg is 24
hyptonuse =25
the other leg is b

24²+b²=25²
576+b²=625
minus 576 from both sides
b²=49
sqrt both sides
b=7

the other leg is 7 units
5 0
4 years ago
How many solutions does this equation have?<br><br> –5(6y + 7) = –17y + 7 − 10y
aalyn [17]

Answer:

y=-14

Step-by-step explanation:

3 0
3 years ago
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