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VladimirAG [237]
3 years ago
14

By what percent will the product of two numbers change if one of them increased by 20% and the other decreased by 20%? HELP!

Mathematics
1 answer:
monitta3 years ago
4 0

Answer:

it will reduce by 5 each 20% rise and when its reduced by 20 it will rise by 80%

Step-by-step explanation:

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If one diagonal of a rhombus is 15 meters long and it’s area is 157.5 square meters, find the measures of the other diagonal
ycow [4]

Answer:

The other diagonal measures 21m

Step-by-step explanation:

In this question, we are tasked with calculating the length of the second diagonal of as Rhombus given the measure of the surface area of the rhombus and the length of the other diagonal

Mathematically, for a rhombus having two diagonals d_{1} and d_{2} , the area of the rhombus can be calculated mathematically using the formula below;

A = 1/2 ×d_{1} × d_{2}

From the question, we can identify that A = 157.5m^{2} and d_{1} = 15m

we input these in the formula;

157.5 = 1/2 × 15 × d_{2}

315 = 15 d_{2}

d_{2} = 315/15

d_{2} = 21m

7 0
3 years ago
A biologist took a count of the number of migrating waterfowl at a particular lake, and recounted the lake's population of water
taurus [48]

Quadratic function ( in standard form ):

y = a x² + b x + c

x = 0:

635 = 0 + 0 + c

c = 635

x = 1:

644 = a + b + 635

a + b = 9

x = 2:

719 = 4 a + 2 b + 635

4 a + 2 b = 84

and now we have a system:

a + b = 9   /  * ( - 2 )

4 a + 2 b = 84

-------------------------

- 2 a + 2 b = - 18

+

 4 a + 2 b  = 84

-------------------------

  2 a = 66

 a = 33;   b = - 24;

 Function is:

 f ( x ) = 33 x² - 24 x + 635

f ( 8 ) = 33 * 64 - 24 * 8 + 635 = 2,112 - 192 + 635 = 2,555

 Answer: The number of waterfowl on week 8 would be 2,555.

 

8 0
3 years ago
What is the volume of this rectangular prism?
sergiy2304 [10]

Answer:

V =\frac{12}{5}\ cm^3

Step-by-step explanation:

<u>The Volume of Rectangular Prism</u>

Given a rectangular prism of dimensions W, L, and H, its volume is the product of the three dimensions:

V = WLH

The figure shows the dimensions:

L=3 cm

W=\frac{4}{3}\ cm

H=\frac{3}{5}\ cm

Thus, the volume is:

V =3*\frac{4}{3}*\frac{3}{5}\ cm^3

V =\frac{36}{15}\ cm^3

Simplifying:

\boxed{V =\frac{12}{5}\ cm^3}

5 0
3 years ago
The dimensin of a rectangular garden are 12 1/2 feet by 16 3/4 feet. If 1 5/8 feet is added to all the sides,find the new dimens
choli [55]

Answer:

14 1/8 feet by 18 3/8.

Step-by-step explanation:

I took 1 5/8 feet and added it to both...

8 0
3 years ago
Find the solution of given expression<br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B64%5Ctimes%209%7D%20" id="TexFormula
Alik [6]

Step-by-step explanation:

\sqrt{64 \times 9}  \\  \sqrt{8 \times 8 \times 3 \times 3}  \\  =  > 8 \times 3 \\  =  > 24

Hence,Your answer is 24

4 0
3 years ago
Read 2 more answers
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