3 years ago

Help me with this problem like the whole thing

Mathematics

1 answer:

Ulleksa [173]3 years ago

3 0

Has to multiply I think try that !

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Given f(x)=x^2−2x−5. <br><br> Enter the quadratic function in vertex form.

FrozenT [24]

Answer:

$f(x) = (x-1)^2-6$

Step-by-step explanation:

Rewrite the quadratic using the method of completing the square:

$x^2-2x-5=(x^2-2x+1)-1-5=(x-1)^2-6\\f(x) = (x-1)^2-6$

From this form it is immediately clear that the vertex of the parabola is at x=1 and its y-intercept at -6.

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one angle of a triangle is 2 / 3 of a right angle . the greater of the other to exceed the lesser by 20 degree. Find the angles

jarptica [38.1K]

2/3 of a right triangle is 60 degrees. Then x + (x+20) + 60 = 180 total.

2x + 80 = 180, so 2x = 100 and x = 50. The angles are 50, 70 and 60 (degrees)

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Four DVDs cost $84. If each DVD costs the same, how much does one DVD cost

nignag [31]

Answer:

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2 years ago

Simplify this expression: 1/2(10x + 12) - (3.5x - 7) *

Anna71 [15]

Simplified Expression:

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