3 years ago

What is the value of the dicriminant Of f f(x)=-7x^2+8x+2

Mathematics

1 answer:

nignag [31]3 years ago

6 0

Answer:

Step-by-step explanation:

discriminant=b²-4ac=8²-4(7)(2)=64-56=8

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Svet_ta [14]

Answer:

Area = 77.1

Step-by-step explanation:

The are of a right triangle is

$\frac{1}{2} \times base \times height$

our base and height are 6 for both triangles, so we shall find the area of one of the triangles...

$\frac{1}{2} \times 6 \times 6 = 18$

multiply this by 2

$2 \times 18 = 36$

Now find the area of the whole circle

$area = \pi {r}^{2}$

our radius is 6, therefore:

$area = \pi {6}^{2} = 113.1$

Finally, subtract the area of the two triangles from the total are of the circle. The difference left over is our answer

$113.1 - 36 = 77.1$

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3 years ago

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154 square feet of glass. The window is 7 feet tall. What is the perimeter of the window

solmaris [256]

154 is the area so...
154 divided by 7 is 22
p= 2 (l+w)
p = 2 (22 + 7)
p = 2 (29)
p = 58 feet
the perimeter is 58 feet

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3 years ago

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A grocery store sells a bag of 5 potatoes for $2. What is the unit cost if each potato in the bag

Dmitrij [34]

Answer:

Unit cost: $2.50 per potato

Step-by-step explanation:

Set up a proportion:

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cross multiply:

2x = 5

divide by 2 on both sides

x= 5/2 or 2.5

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3 years ago

Clayton's bank offered him a 4.5% interest rate for his mortgage. If he purchases 3 points, what will his new rate be?

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Answer:

4.125%

Step-by-step explanation:

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A rectangle has an area of 500 square meters. If it's length is 4x-3 meters and it's width is 2x+6 meters, what is the actual wi

Lilit [14]

Answer:

25 meters .

Step-by-step explanation:

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