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Mnenie [13.5K]
3 years ago
7

Someone plz correct me plz I beg u

Mathematics
2 answers:
Bas_tet [7]3 years ago
6 0

Answer:

18.5

Step-by-step explanation:

74 / 4 = 18.5

Hope that helps!

Inessa05 [86]3 years ago
3 0

18.5 I think would be the correct answer

hope that helped :)

Rounded: 19 (i think lol)

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Determine the equation of the line that passes through the points of intersection of the graphs of the quadratic functions f(x)
timofeeve [1]

Answer:x-2y-2=0

Step-by-step explanation:

Given :

f(x) = x^2 - 4 \\ g(x) = - 3x^2 + 2x + 8

Point of intersection :

f(x)=g(x)\\x^2-4=-3x^2+2x+8\\4x^2-2x-12=0\\2x^2-x-6=0\\2x^2-4x+3x-6=0\\2x(x-2)+3(x-2)=0\\(x-2)(2x+3)=0\\x=2\,,\,\frac{-3}{2}

x=2\,;f(2)=2^2-4=0\\x=\frac{-3}{2}\,; f\left ( \frac{3}{2} \right )=\left ( \frac{3}{2} \right )^2-4=\frac{-7}{4}=-1.75

So, we have points \left ( 2,0 \right )\,,\,\left ( -1.5,-1.75\ \right )

Equation of line passing through two points \left ( x_1,y_1 \right )\,,\,\left ( x_2,y_2 \right ) is given by y-y_1=\frac{y_2-y_1}{x_2-x_1}\left ( x-x_1 \right )

Let \left ( x_1,y_1 \right )=\left ( 2,0 \right )\,,\,\left ( x_2,y_2 \right )=\left ( -1.5,-1.75\ \right )

So, equation is as follows :

y-0=\frac{-1.75-0}{-1.5-2}\left ( x-2 \right )\\y=\frac{-1.75}{-3.5}\left ( x-2 \right )\\y=\frac{1}{2}(x-2)\\2y=x-2\\x-2y-2=0

4 0
4 years ago
The perimeter of a rectangle is 152ft. the width is 28 ft shorter than the length. what are the dimensions
Ira Lisetskai [31]
A) 2L + 2W = 152B) L = W + 28We substitute equation B) into A)A) 2 * (W + 28) + 2W = 152A) 2W + 56 + 2W = 152A) 4W = 96A) Width = 24 feet
Length = 52 feet


8 0
3 years ago
The complement of angle A is 42°. What is the measure of angle A? <br><br>​
Genrish500 [490]

Answer:

48 degrees

Step-by-step explanation:

90-42=48

48 degrees

4 0
3 years ago
What is the distance between R(1, -6) and S(10, 3)?<br> Round to the nearest tenth.
lozanna [386]

The distance formula for 2 points = √((x2-x1)^2 + (y2-y1)^2)

use R for x1 and y1 and use S for x2 and y2.

Distance = √((10- 1)^2 + (3-(-6))^2)

Distance = √(9^2 + 9^2)

Distance = √(81 + 81)

Distance = √162

Distance = 9√2

Distance = 12.7 ( Rounded to nearest tenth)

5 0
4 years ago
An Avon sales lady buys a make-up kit for $120 and sells it for $65 more. What is the percent of markup? 37.5%
Salsk061 [2.6K]

Answer: 54.2%

Step-by-step explanation:

The percent mark-up refers to how much higher you sell a product than what you bought it for expressed as a percentage of what you bought it for.

In this case, the woman bought it for $120 and sold it for $65 more.

Cost = $120

Markup = $65

Markup percentage = 65 / 120 * 100%

= 54.2%

6 0
3 years ago
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