How many feet in a rod? 2.5 4.5 8.5 16.5

All squares are rectangles. A. True B. False

Arisa [49]

Answer:

A true

Step-by-step explanation:

Rectangles have parallel sides and 90 degree angles.

Squares have parallel sides and 90 degree angles and equal length sides

Square are a subset of rectangles

All squares are rectangles

5 0

2 years ago

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The average value of two positive numbers is 30% less than one of the two numbers. By which percentage is average value bigger t

Viefleur [7K]

Answer:

75% bigger

Step-by-step explanation:

Let the first number be x and the second be y.

So:

$Average = \frac{x + y}{2}$

And:

$Average = (1 - 30\%) * x$ -----30% less than x

Substitute $Average = (1 - 30\%) * x$ in $Average = \frac{x + y}{2}$

$\frac{x + y}{2} = (1 - 30\%) * x$

$\frac{x + y}{2} = (1 - 0.30) * x$

$\frac{x + y}{2} = 0.70 * x$

$\frac{x + y}{2} = 0.70x$

Cross multiply

$x + y = 0.70x * 2$

$x + y = 1.40x$

Collect like terms

$1.40x - x = y$

$0.40x = y$

Make x the subject

$x = \frac{y}{0.40}$

$x = 2.50y$

So, the average is:

$Average = (1 - 30\%) * x$

$Average = (1 - 30\%) * 2.50y$

$Average =0.70 * 2.50y$

$Average =1.75y$

Rewrite as:

$Average =(1 + 0.75)y$

Express as percentage

$Average =(1 + 75\%)y$

This means that the average is 75% bigger than the second number

6 0

2 years ago

PLEASE HELP ME THIS IS DUE IN 30 MIN I WILL MAKE YOU BRAINLIEST ITS 20 POINT

inn [45]

Answer:

you have nicce pappeeerrrr

Step-by-step explanation:T-T X_X X_X

8 0

2 years ago

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Please help asap!!! i’ll give lots of points

Harrizon [31]

Answer:

all you have to do is multiply it through and divide it out.

Step-by-step explanation:

8 0

3 years ago

Sally’s age is two times Sydney’s age. The sum of their age is 27. What is Sydney’s age?

masya89 [10]

Answer:

9

Step-by-step explanation:

18+9=27, answer=9......

7 0

2 years ago

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