I need help with 1+1 First answer gets Brainliest(Please explain how you got the answer)

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Answer 1

Answer:

Answer:

Step-by-step explanation:

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the area of a rectangle is 52 in². the length of the rectangle is 9 in. longer than the width. what is the width of the rectangle? 8 in. 6 in. 4 in. 3 in.

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length, l = width, w + 9
l = w + 9

area = length * width
52 = l * w
52 = (w+9) w
52 = w^2 + 9w
w^2 + 9w - 52 = 0
w^2 + 13w - 4w - 52 = 0
w (w + 13) - 4 (w + 13) = 0
(w + 13) (w - 4) = 0

length = 13 in
width = 4 in

The area of a sector of a circle with a radius of 4 centimeters is 2.512 square centimeters. The estimated value of ╥ is 3.14. The measure of the angle defining the sector is

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The equation for the area of a sector of a circle is expressed as the product of pi, square of the radius and the ratio of the angle of the sector and 360 degrees.

Area = πr^2 (α / 360°)

We obtain the angle by manipulating the equation.

α = (Area x 360°) / πr^2
α = (2.512 cm^2 x 360°) / (π x 4^2)
α =35.98°

To determine the appropriate landing speed of an airplane, the formula D = .1x 2 − 3x + 22 is used, where x is the initial landing speed in feet per second and D is the distance needed in feet. If the landing speed is too fast, the pilot may run out of runway; if the speed is too slow, the plane may stall. What is the appropriate landing speed if the runway is 800 feet long? Show all of your work or explain how you came up with your solution

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$800=0.1x^2-3x+22\n0.1x^2-3x-778=0\n\Delta=(-3)^2-4\cdot0.1\cdot(-778)=9+3112=3121\n√(\Delta)=√(3121)\nx_1=(-(-3)-√(3121))/(2\cdot0.1)=(3-√(3121))/(0.2)=15-5√(3121)\approx-264.3\nx_2=(-(-3)+√(3121))/(2\cdot0.1)=(3+√(3121))/(0.2)=15+5√(3121)\approx294.3$

Approx. 294.3 ft/s

Steve bought 2 plain and 1/4 of a pepperoni pizza. In all how much pizza did he buy?

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In all he brought

Plain pizza + pepperoni pizza

= 2 + ¼
= 2¼

What is the perimeter of rectangle ABCD on the coordinate plane? coordinate grid

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Drat it all I am so bad at reading. Sorry about that it is my fault :O

well the formula for a perimeter of a triangle is 2(lxw) so the length here is 10 i think (just count the cubes on the bottom) then with that number you multiply that by the width (side) then multiply by 2. i counted ten on the length and 5 on the width (im not sure if thats how any because its hard to cound on a tiny grid on a computer hehe), so i multiplied 10 x 5 and got 50, then multiply by 2, i got 100. im not sure, but ill double check :)

Which expression can be used to convert 22 Australian dollars to US dollars

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Answer:

The expression is 1 Australian dólar is equal to 0.67 US dollar

Step-by-step explanation:

To convert australian dollars to US dollar you have to use the currency Exchange that is the conversion rate between this 2 divises.

Now, the currency Exchange is

1 Australian dólar is equal to 0.67 US dollar

So, 22 Australian dollars are 22*0.67= 14.74‬ US dollar

hopefully this helps! let me know if you figured it out (:

To convert the Australian dollars to US dollars you can use the following expression:

$22 AUD × 1 USD / 1.2 AUD

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A company makes concrete paving stones in different sizes. Each stone has a volume of 360 cubic inches and a height of 4 inches. How many different paving stones could be made if any whole number length and width?

Fyi everyone, random231 is awesomeFor a craft project, four students each chose three pieces of wire from a box. Don’s wires measure 3 inches, 5 inches, and 12 inches. Margo’s wires measure 6 inches, 8 inches, and 14 inches. Sonji’s wires measure 12 inches, 8 inches, and 17 inches. Liam’s wires measure 16 inches, 8 inches, and 27 inches. Which student chose pieces that can be used to construct a triangle? a. Don b. Margo c. Sonji d. Liam

What is the answer?