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Morgarella [4.7K]
3 years ago
13

Record the product. use expanded form to help.4x21=

Mathematics
2 answers:
Luda [366]3 years ago
7 0
8.4 * 10^1 is what I think the answer is 
Vladimir [108]3 years ago
3 0
To use it in expanded form
(4×20)+(4×1)=84
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Mandy is building a rectangular garden pond with the area of 12ft^2. The length of pool needs to be 2 ft more than twice the wid
Genrish500 [490]

The length of rectangular pool is 6 ft and width of rectangular pool is 2 ft.

Step-by-step explanation:

Given,

Area of rectangular pool = 12 square feet

Let,

Width of pool = w

Length of pool = l = 2w+2

Area = Length * Width

12=(2w+2)*w\\12=2w^2+2w\\2w^2+2w-12=0

Dividing each term by 2;

\frac{2w^2}{2}+\frac{2w}{2}-\frac{12}{2}=0\\w^2+w-6=0\\w^2+3w-2w-6=0\\w(w+3)-2(w+3)=0\\(w+3)(w-2)=0\\

Either,

w+3 = 0       => w=-3

Or,

w-2=0          =>w=2

As width cannot be negative, therefore,

Width of rectangular pool = 2 ft

Length of rectangular pool = 2w+2 = 2(2)+2 = 4+2 = 6 ft

The length of rectangular pool is 6 ft and width of rectangular pool is 2 ft.

Keywords: rectangle, area

Learn more about areas at:

  • brainly.com/question/10703930
  • brainly.com/question/10772025

#LearnwithBrainly

7 0
3 years ago
The points H, I, J and K all lie on the same line segment, in that order, such that the
tresset_1 [31]

Answer:

IJ = 12

Step-by-step explanation:

sum the parts of the ratios, 3 + 3 + 4 = 10 parts

Divide HK by 10 to find the value of one part of the ratio.

40 ÷ 10 = 4 ← value of 1 part of ratio , then

IJ = 3 parts = 3 × 4 = 12

6 0
3 years ago
the ratio of men and women in a certain factory is 3 to 4. there are 198 men. How many workers are there?
LUCKY_DIMON [66]

3 men

4 women

7 total


3 men/ 7 total = 198 men/ x total

using cross products

3*x = 7 * 198

divide each side by 3

x = 7*198/3

x = 462

There are 462 workers


If you mean 3 men and 1 women for a total of 4 workers when you state a  ratio of men and women in a certain factory is 3 to 4.

3/4 =198/x

Using cross products

3x = 4* 198

Divide each side by 3

3x/3 = 4*198/3

x =264

264 workers


It all depends on how you define ratio of men and women in a certain factory is 3 to 4.   This is incorrect phrasing and I took it to be men to women.   You cannot have a ratio of men and women.




5 0
3 years ago
A scale for a drawing is 5 centimeters= 1 meter. What is the scale in terms of centimeter to centimeters
umka2103 [35]

The scale in cm to cm is:

1 cm = 20 cm

Step-by-step explanation:

Scales are used to draw maps and blueprints of large objects on paper.

Given scale is:

5 centimeters = 1 meter

WE have to find the centimeter to centimeter scale. In order to do so, we have to convert the meters into centimeters

As there are 100 centimeters in a meter

So,

the scale will be:

5 cm = 100 cm

Simplifying:

The scale in cm to cm is:

1 cm = 20 cm

Keywords: Scale, factors

Learn more about scales at:

  • brainly.com/question/8806598
  • brainly.com/question/8955867

#LearnwithBrainly

3 0
3 years ago
You are hired to work at quickie-mart and will be paid $9.50 per hour 1. Write an income function that describes the amount of m
zzz [600]

Answer:

f(x)=nx

or

f(x)=9.50x

Step-by-step explanation:

Let x be the amount of hours and n be the hourly rate (9.50).

f(x)=nx

or if you prefer to use 9.50 instead of n, the function would be:

f(x)=9.50x

3 0
3 years ago
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