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Drupady [299]
2 years ago
9

if a + b + c = 9 and a square + b square + c square = 35 the find the value of ab + bc + ca .​ I am in need of help

Mathematics
1 answer:
Advocard [28]2 years ago
8 0

a+b+c=9 and a2+b2+c2=35 then by using identity

(a+b+c)2=a2+b2+c2+2ab+2bc+2ca,we get the answer 9x9=35+2(ab+bc+ca)

2(ab+bc+ca)=9x9-35

2(ab+bc+ca) =81-35then we get ab+bc+ca=46/2 so ab+bc+ca=23

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3 years ago
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Find the equation of the line in slope-intercept form.<br> m=− 4 7 through (14, 3
kakasveta [241]

Answer:

The answer to your question is:   y = -47x + 661

Step-by-step explanation:

Data

m = - 47         I wasn't sure if the slope was -47 or -4.

Point (14, 3)

Formula

(y - y1) = m(x - x1)

Process

                  (y - 3) = -47(x - 14)

                   y - 3 = -47x + 658

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                   y = -47x + 661

5 0
3 years ago
Help me please please!!!!!!!!
vova2212 [387]

Answer:

a

Step-by-step explanation:

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6 0
3 years ago
Choose the correct description of the graph of the compound inequality x − 1 less than or equal to 9 or 2x greater than or equal
DerKrebs [107]
X - 1 < = 9         or         2x > = 24
x < = 9 + 1                    x > = 24/2
x < = 10                        x > = 12

closed circle on 10, shaded to the left
closed circle on 12, shaded to the right

________10_______12__________
       <====X                 X======>
the X represents closed circles
8 0
3 years ago
Please help , thank you !!!!!!1
Lynna [10]
Answer is 7.
55+5X=90
5X=90-55
5X=35
X=35/5
X=7
6 0
3 years ago
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