All categories

3 years ago

Explain why the expression 7*3^x is not equal to the expression 21^x

1 answer:

5 0

According to the order of operations, exponents must be evaluated before multiplication.

Here's and example where x=2.
7*3^2
7*9
63

21^2=441

63 does not equal 441

You might be interested in

4 EZ GEOMETRY QUESTIONS FOR 20 POINTS!

MatroZZZ [7]

Answer:

1. use the formula

$(n-2)180$

$(20 - 2)180\\18 * 180 = 3240$

2. use the formula

$360/n\\360/12\\n = 30$

3. There is only one at 360 degrees

4. there are 6 rotational symmetries and the number of reflectional symmetries would be 6 as you can see:

6 0

2 years ago

Find the area of the circle to the<br> nearest tenth. Use 3.14 for it<br> (11 mm)

Nikolay [14]

Answer:

The area of the circle is 379.94 mm²

Step-by-step explanation:

To solve this problem we need to use the area formula of a circle:

a = area

r = radius = 11 mm

π = 3.14

a = π * r²

we replace with the known values

a = 3.14 * (11 mm)²

a = 3.14 * 121 mm²

a = 379.94 mm²

Round to the nearest tenth

a = 379.94 mm² = 379.9 mm²

The area of the circle is 379.9 mm²

4 0

2 years ago

A swimming pool at a park measures 9.75 meters by 7.2 meters.

neonofarm [45]

Answer:

Part a) The area of the swimming pool is $70.2\ m^2$

Part b) The total area of the swimming pool and the playground is $105.3\ m^2$

Step-by-step explanation:

Part a) Find the area of the swimming pool

we know that

The area of the swimming pool is

$A=LW$

where

L is the length side

W is the width side

we have

$L=9.75\ m\\W=7.2\ m$

substitute the values

$A=(9.75)(7.2)$

$A=70.2\ m^2$

therefore

The area of the swimming pool is $70.2\ m^2$

Part b) The area of the playground is one and a half times that of the swimming pool. Find the total area of the swimming pool and the playground

we know that

To obtain the area of the playground multiply the area of the swimming pool by one and a half

$\frac{1}{2}(70.2)=35.1\ m^2$

To obtain the total area of the swimming pool and the playground, adds the area of the swimming pool and the area of the playground

$70.2\ m^2+35.1\ m^2=105.3\ m^2$

therefore

The total area of the swimming pool and the playground is $105.3\ m^2$

6 0

2 years ago

Find the area of a right triangle with a<br>height of 8 1/2 feet and a base of 15 feet,

slamgirl [31]

Answer:

The area is 63.75 feet square

Step-by-step explanation:

Formula for area of a triangle is 1/2 × base × height

And we are given each of this variables in the question above

Therefore you just have to input those values to the formula

1/2×17/2×15

255/4

=63.75

Therefore the area of the triangle is 63.75 feet square

5 0

3 years ago

Find the exact values for the lengths of the labeled segments a, b and p drawn in green, red, and blue, respectively. Note that

ale4655 [162]

It's pretty tough to do anything with this question when there are
no labels, no segments, no green, no red, no blue, no circle, no arc,
and no indicated point. Was there some more that was supposed to
go along with it, like maybe perhaps possibly a drawing or a picture
of some sort ?

3 0

3 years ago