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likoan [24]
3 years ago
5

The speed of an Arabian horse is "4x + 2" miles per hour slower than a thoroughbred horse with a speed of "25x − 5" miles per ho

ur. Find a single expression that represents the speed of an Arabian horse. A) 21x − 3 B) 21x − 7 C) 29x − 3 D) 29x − 7
PLS AWNSER THIS WERE GOING TO LEEVE AT 855
Mathematics
1 answer:
sdas [7]3 years ago
7 0

Answer:

B) 21x-7  

Step-by-step explanation:

Let A = speed of Arabian horse and T = speed of thoroughbred.

Then

A = T – (4x + 2)

A = T – 4x - 2                Remove parentheses

A = 25x - 5 - 4x – 2     Combine like terms

A = 21x - 7

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lesya [120]
Ivan forgot to follow PEMDAS
Division first
12/3 = 4
4 x 2 = 8
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3 0
3 years ago
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Estimate the area of Alberta in square miles. Show your reasoning
ella [17]

Answer:  About 278,250\ mi^2

Step-by-step explanation:

The missing figure is attached.

Notice in the first picture that Alberta has a complex shape.

You can calculate the area of a complex shape by decomposing it into polygons whose areas can be calculated easily.

Observe the second picture. Notice that it can be descompose into two polygons: A trapezoid and a rectangle.

The area of the trapezoid  can be calcualted with the formula:

A_t=\frac{h}{2}(B+b)

Where "h" is the height, "B" is the long base and "b" is short base.

And the area of the rectangle can be found with the formula:

 A_r=lw

Wkere "l" is the lenght and "w" is the width.

Then, the apprximate area of Alberta is:

A=\frac{h}{2}(B+b)+lw

Substituting vallues, you get:

A=(\frac{(410\ mi-180\ mi)}{2})(760\ mi+470\ mi)+(180\ mi)(760\ im)\\\\A=141,450\ mi^2+136,800\ mi^2\\\\A=278,250\ mi^2

Therefore, the area of of Alberta is about 278,250\ mi^2.

5 0
3 years ago
What is the sum of a number and its additive inverse? A. 0 B. -1 C. 1 D. undefined
Andrej [43]
The answer is A. 0
i hope this helps!
5 0
3 years ago
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If a cube measures 5.3 cm on each side and has a mass of 280 grams how much is its volume​
OlgaM077 [116]

Answer:

8.1 g/cm

Step-by-step explanation:

3 0
3 years ago
A shipment of sugar fills 14 containers. If each container holds 2 1/4 tons of sugar, what is the amount of sugar in the entire
SashulF [63]

You would do 14*2 1/4 so that would be 31.5

7 0
3 years ago
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