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Greeley [361]
3 years ago
15

The three are the whole question.

Mathematics
1 answer:
Eddi Din [679]3 years ago
4 0
Tbh Idrk u should ask the teacher
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100 Points!
tester [92]

Part A: x = -5/4, 3 || (-5/4, 0) (3, 0)

To find the x-intercepts, we need to know where y is equal to 0. So, we will set the function equal to 0 and solve for x.

4x^2 - 7x - 15 = 0

4 x 15 = 60 || -12 x 5 = 60 || -12 + 5 = -7

4x^2 - 12x + 5x - 15 = 0

4x(x - 3) + 5(x - 3) = 0

(4x + 5)(x - 3) = 0

4x + 5 = 0

x = -5/4

x - 3 = 0

x = 3

Part B: minimum, (7/8, -289/16)

The vertex of the graph will be a minimum. This is because the parabola is positive, meaning that it opens to the top.

To find the coordinates of the parabola, we start with the x-coordinate. The x-coordinate can be found using the equation -b/2a.

b = -7

a = 4

x = -(-7) / 2(4) = 7/8

Now that we know the x-value, we can plug it into the function and solve for the y-value.

y = 4(7/8)^2 - 7(7/8) - 15

y = 4(49/64) - 49/8 - 15

y = 196/64 - 392/64 - 960/64

y = -1156/64 = -289/16 = -18 1/16

Part C:

First, start by graphing the vertex. Then, use the x-intercepts and graph those. At this point we should have three points in a sort of triangle shape. If we did it right, each of the x-values will be an equal distance from the vertex. After we have those points graphed, it is time to draw in the parabola. Knowing that the parabola is positive, we draw in a U shape that passes through each of the three points and opens toward the top of the coordinate grid.

Hope this helps!

6 0
2 years ago
A soccer team has 11 players on the field. Of those players, 2 are forwards, 4 are midfielders, 4 are defenders, and 1 is a goal
Murrr4er [49]

Answer:

4/11

Step-by-step explanation:

There are 4 midfielders on the team out of 11.

3 0
3 years ago
A person has a loan balance of $3083.86 on the new 23-inch rims and tires he bought for his SUV. If his payments are $106.34 per
dusya [7]
3038.86 / 106.34 = 29

29 months

6 0
2 years ago
at tennis practice, tim practices his backhand and his serve at least 2 hours each day. He works less on his backhand than his s
earnstyle [38]
For the answer to the question above, Tim practices his backhand and his serve at least 2 hours each day this means X =< 2 ( less than or equal to 2 hrs). He works less on his backhand than his serve and practices his serve more than an hour daily.  <span>Y < 1</span>
3 0
3 years ago
the length of a rectngle is 8/3 times as great as its widthwhat is the width if the length of a rectangle is 24 ft.
laila [671]
L=(8/3)W = 24 ft.  Solving for W, we mult. both sides of this eqn by (3/8), obtaining

W = (3/8)(24 ft) = 9 ft (answer)
4 0
3 years ago
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