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vekshin1
3 years ago
13

What’s the value of 2x + y when x = 4 and y = 3

Mathematics
2 answers:
goldenfox [79]3 years ago
6 0
Since x=4 and y=3

You then plug both values into the equation.

2(4)+3

This would equal 8+3

Therefore the answer is 11
nasty-shy [4]3 years ago
6 0

Answer:

11

Step-by-step explanation:

2*4 + 3

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Jack is flying his kite . He runs 100 feet away from his house and lets out 45 feet of string . The angle of elevation from the
fiasKO [112]

Answer: 125.80 ft

Step-by-step explanation:

Asuming the described situation is as shown in the figure below, we need to find the distance h between the kite and Jacks house, but first we need to find the x, y and then d.

How?

We will use trigonometry, especifically the trigonometric functions sine and cosine:

For y:

sin(65 \°)=\frac{y}{45 ft} (1)

Where y is the opposite side to the angle and 45 ft the hypotenuse.

Isolating y:

y=40.78 ft (2)

For x:

cos(65 \°)=\frac{x}{45 ft} (3)

Where x is the adjacent side to the angle.

Isolating x:

y=19.017 ft (4)

Finding d:

d=x+100 ft (5)

d=19.017 ft +100 ft

d=119.017 ft (6)

Now that we have found these values, we have to work with a bigger triangle, where the hypotenuse is the distance between the kite and Jack's house h and the sides are the values calculated in (4) and (6).

So, in this case we will use the <u>Pithagorean theorem</u>:

h^{2}=y^{2} +d^{2} (7)

Isolating h and writing with the known values:

h=\sqrt{y^{2} +d^{2}} (8)

h=\sqrt{(19.017 ft)^{2} +(119.017 ft)^{2}} (9)

h=125.80 ft This is the distance between the kite and the house

3 0
3 years ago
The degree of the polynomial function f(x) is 4.
Lyrx [107]

Answer:

Option A

Step-by-step explanation:

Degree of the polynomial function = 4

That means highest degree term of the given polynomial has power = 4

If the roots of a quadratic polynomial are a, b, c, d then the polynomial function will be,

f(x) = (x - a)(x - b)(x - c)(x - d)

It's given in the question that roots are x = -2, -1, 1 and 3

Therefore, polynomial function will be,

f(x) = (x + 2)(x + 1)(x - 1)(x - 3)

From the given options, graph A shows that the graph intersects the x-axis at x = -2, -1, 1 and 3

Therefore, Option A will be the answer.

3 0
2 years ago
Write the equation of the line going through the points A(0, -4) and B(-1, -6). Then graph.
Snezhnost [94]

Answer:

y=2x-4

Step-by-step explanation:

3 0
3 years ago
[PICTURE ATTACHED] HEEELLPP!
faltersainse [42]

Answer:I believe it is ther last one about negative info.

Step-by-step explanation:

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2/4 Hopefully this should help!
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