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Mathematics

1 answer:

lorasvet [3.4K]3 years ago

4 0

Answer:

L=8

Step-by-step explanation:

area of a rectangle = length x width

given:

area= 20 square units

width =2.5 units

find the length by substituting :

20=2.5 x L

L= 20/2.5=8

that's it :)

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Write the smaller solution first, and the larger solution second. h(x)=-5x^2 +180h(x)=−5x 2 +180

katrin2010 [14]

Answer:

x = -6,6

Step-by-step explanation:

h(x)=−5x^2 +180

Assuming you want to find the zero's

0 =−5x 2 +180

Subtract 180 from each side

0-180=−5x^2 +180-180

-180 = -5x^2

Divide each side by -5

-180/-5 = -5x^2/-5

36 = x^2

Take the square root of each side

±sqrt(36) = sqrt(x^2)

±6 = x

x = -6,6

7 0

4 years ago

Read 2 more answers

The aspect ratio is used when calculating the aerodynamic efficiency of the wing of a plane. For a standard wing area, the

Lesechka [4]

Answer:

Y=s^2/36 and y=5.7;14.3 ft

Step-by-step explanation:

A(s)=s2/36 is the function. A(s) is the aspect ratio, while s is the wingspan. A(s) = 5.7 if one glider has an aspect ratio of 5.7. We'd want to know the glider's wingspan. By replacing A(s) with Y, we get the following equation system:

Y=s^2/36
with y = 5.7
5.7 = s^2/36
5.7*36 = s^2
√205.2 = s
14.3 ft

7 0

2 years ago

2 Points

noname [10]

Answer:

Step-by-step explanation:

The symbol between JK and LM mean that they are perpendicular, it is, that at their intersection 90 degrees angles are formed (those are right angles). So, the correct option here is option B. JK and LM meet at a right angle.

Here I attach a dray of how an intersection like this must look like. I hope it is helpful for you. In the draw four right angles are formed, however, this is not necessary, coul be only one or two depending on the length of the lines segments.