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lozanna [386]
3 years ago
15

Plss help me for with this math..​

Mathematics
1 answer:
pickupchik [31]3 years ago
6 0

Answer:

Step-by-step explanation:

3. x^2 +3x=54

x^2 +3x -54 = 0

(x-9)(x+6) = 0

x = 9 and x = -6

4. X^2 - 10x + 21 [(x - 7)(x - 3)

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A

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This option contains a number that would appear on this scale.

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Find the exact value of the trigonometric function of theta from the given information. cosine thetaequalsnegative StartFraction
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Is it a multiple choise?

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4 years ago
A company finds it can produce 15 heaters for $ 4050​, while producing 25 heaters costs $ 6550. Express the​ cost, y, as a l
amid [387]

Answer:

y=250x+300

Step-by-step explanation:

Let x be the number of heaters and y be the total cost.

We need to find the linear function for y in terms of x.

It is given that company can produce 15 heaters for $4050 and 25 heaters costs $ 6550.

It means the line passes through the points (15,4050) and (25,6550).

If a line passes through two points (x_1,y_1) and (x_2,y_2), then the equation of line is

y-y_1=\frac{y_2-y_1}{x_2-x_1}(x-x_1)

The equation of line is

y-4050=\frac{6550-4050}{25-15}(x-15)

y-4050=\frac{2500}{10}(x-15)

y-4050=250(x-15)

y-4050=250x-3750

Add 4050 on both sides.

y-4050+4050=250x-3750+4050

y=250x+300

Therefore, the required linear function is y=250x+300.

8 0
3 years ago
The question that follows this graph is:
azamat

Answer:

S'(5,-1), M'(1,-3)

Step-by-step explanation:

So, if the rotation is clockwise, the formula is (x,y)--->(-x,-y).

The original points are, (-1,3) and (-5,1).

Using the formula,

(-1,3) ----> (1,-3)

(-5,1) ----> (5,-1)

For the question in the image, the reflection over the x-axis is..

S'(-5,1) ---> (-5,-1)

M'(1,-3) ---> (-1,-3)

6 0
4 years ago
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