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mestny [16]
3 years ago
15

Can someone help meeeee plz if you help I would really appreciate the help on all of them but I need help with the last one the

most

Mathematics
1 answer:
kati45 [8]3 years ago
4 0
12.T
13.F
14.F
15.F.
16.???(where is 16?:O)
17.T
18.T
19.T
20.???(where is 20?)
21.5
22.5
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2. How many real number solutions are there to the equation 0 =-3x2 + x - 4?
goblinko [34]

For this case we have the following quadratic equation:

-3x ^ 2 + x-4 = 0

Where:

a = -3\\b = 1\\c = -4

By definition, the discriminant of a quadratic equation is given by:

d = b ^ 2-4 (a) (c)

We have to:

d> 0: Two different real roots

dTwo different complex roots

d = 0: Two equal real roots

Substituting the values we have:

d = 1 ^ 2-4 (-3) (- 4)\\d = 1-48\\d = -47

So, we have two different complex roots

Answer:

Two different complex roots

7 0
3 years ago
Point Q’ is the image of Q (3,-4) under a reflection across the x-axis
7nadin3 [17]

Answer:

Q' (-3,4)

Step-by-step explanation:

A reflection across the x-axis would mean that only the x value of the point would change. This means that the y value would still be 4. To find the x value, just flip it to a negative. The negative of 3 is -3

5 0
3 years ago
Read 2 more answers
Prove: segment SD = segment PD
Elza [17]

Answer:

C

Step-by-step explanation:

SD is congruent to PD and both triangles share the same side with each other.

7 0
3 years ago
The angle of elevation to a nearby tree from a point on the ground is measured to be 66^{\circ} ∘ . How tall is the tree if the
Nimfa-mama [501]

By comparing with a right triangle, we will see that the height of the tree is 62.12ft

<h3>How tall is the tree?</h3>

We can compare the situation with a right triangle. Such that the hypotenuse measures 68 ft, and an angle measures 66°.

We want to get the height of the tree, which would be the opposite cathetus, then we can use the relation:

Sin(a) = (opposite cathetus)/hypotenuse.

Sin(66°) = H/68ft

Tan(66°)*68ft = H = 62.12ft

The height of the tree is 62.12ft

If you want to learn more about right triangles, you can read:

brainly.com/question/2217700

6 0
1 year ago
A player moves a knight from location (3, 2) to (5, 1) on a chessboard. If the bottom-left square is labeled (1, 1), which descr
ASHA 777 [7]
First we have to note which number represents which axis. As a general rule x axis represents first number. It describes if figure is moving left or right.

Second number is y axis and it describes if figure is moving up or down.

Now that we said that we can see that x axis increased by 2 while y axis decreased by 1. Description that matches is:

1 square down and 2 squares right.
7 0
2 years ago
Read 2 more answers
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