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faust18 [17]
3 years ago
5

Unit rates and ratios need help will give brainiest

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
4 0

Answer:

6

10

3

57

10

Step-by-step explanation:

just divide and find x:1

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Find the solution to the equation below.<br> 2x^2+3x-20=0
mariarad [96]

Answer:

  x = -4, 5/2

Step-by-step explanation:

A quadratic can be solved may ways, including graphing, factoring, and the quadratic formula. You can also check possible answers by making use of the relationships between solutions and the coefficients.

__

A graph is attached. It shows the solutions to be -4 and 5/2.

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When factored, the equation becomes ...

  (2x -5)(x +4) = 0 . . . . . has solutions x=-4, x=5/2 (these make the factors zero)

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Using the quadratic formula, the solutions of ax^2 +bx +c = 0 are found from ...

  x = (-b±√(b²-4ac))/(2a)

  x = (-3±√(3²-4(2)(-20))/(2(2)) = (-3±√169)/4 = {-16, +10}/4

  x = {-4, 5/2}

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For ax^2 +bx +c = 0, the solutions must satisfy ...

  product of solutions is c/a = -20/2 = -10

Only the first and last choices have this product.

  sum of solutions is -b/a = -3/2

Only the first choice (-4, 5/2) has this sum.

8 0
3 years ago
The federal government spends $25.2 million each year to operate parks and historic sites in Washington D.C. This is $7.8 millio
Ray Of Light [21]

Answer:

y + 7.8 = 25.2

y = 17.4

Step-by-step explanation:

y + 7.8 = 25.2

(now we solve the equation .... we substract 7.8 from each side of the equation )

y = 25.2 - 7.8

y = 17.4

5 0
3 years ago
An item priced at $10.20 has a sales tax of $0.41.Find the sales tax rate expressed as a percent.
torisob [31]
0.41 / 10.20 = 0.040.....multiply by 100 to get ur percent = 4%
3 0
3 years ago
In the football game between NM and JL. It's the end of the second half and the cougars are attempting a miraculous 50 yard fiel
Yanka [14]

Answer:

88.02 ft/s

Step-by-step explanation:

Angle with the horizontal, θ =25°

Initial velocity, v = 60 mph

1 mph = 1.467 ft/s

60 mph = 60 × 1.467 ft/s = 88.02 ft/s

Vertical component, v sin θ = 88.02 sin 25° = 37.2 ft/s

Horizontal component, v cos θ = 88.02 cos 25°= 79.8 ft/s

3 0
3 years ago
Which rule represents the translation of hexagon D'E'F'G'H'I' ?
Sveta_85 [38]

Answer:

C (X,Y)->(X-4,×-5) I would say bro

3 0
3 years ago
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