Please help me..

Mathematics

1 answer:

drek231 [11]3 years ago

3 0

Answer:

D) -5/3

Step-by-step explanation:

to find the slope, use the formula (x↓2-x↓1)/(y↓2-y↓1)

if you plug in the values in this case, you would then solve (10-5)/-5+2

this equals 5/-3, or -5/3

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Ostrovityanka [42]

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3 years ago

Cuál es el conciente de 8)240

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Find the discriminant and determine the nature of the roots to the quadratic equation

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№17
$x^{2} +6x-7=0 \\ D=6 ^{2} -4*(-7)=36+28=64=8 ^{2} \\ \\ x_{1} = \frac{-6+8}{2} =1 \\ \\ x_{2} = \frac{-6-8}{2} =-7$
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№18
$2 x^{2} -3x+4=3 \\ 2 x^{2} -3x+4-3=0 \\ 2 x^{2} -3x+1=0 \\ \\ D= -3 ^{2} -4*2=9-8=1 \\ \\ x_{1} = \frac{3+1}{2*2} = \frac{4}{4} =1 \\ \\ x_{2} = \frac{3-1}{2*2} = \frac{2}{4} =0.5$
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№19
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4 years ago

Solve for x in this equation:

Evgen [1.6K]

Answer:negative case : 2.5x - 6.8 = -12.9

positive case : 2.5 - 6.8 = 12.9

step 2 : 6.8

step 3 : dividing by 2.5

step 4 : x = 7.88

Step-by-step explanation:

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4 years ago

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lukranit [14]

Answer:28inches & 84inches

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Now we know that the second piece is 28inches long. Since the first piece is three times as long, simply multiply 28*3 and we'll know the length of the first piece.

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3 years ago