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Inessa [10]
3 years ago
11

Write a simplified polynomial expression in standard form to represent the area of the rectangle below x+5 and 2x-4

Mathematics
2 answers:
Firdavs [7]3 years ago
7 0
It would be 2x^2 + 6x-20
ValentinkaMS [17]3 years ago
4 0

Answer:

2x^2+6x-20

Step-by-step explanation:

The sides of the rectangle are x+5 and 2x-4

To find the polynomial that represents the area of the rectangle , multiply the sides of the rectangle

(x+5)(2x-4)

Apply FOIL method to multiply it

(x+5)(2x-4)

2x^2-4x+10x-20

Combine like terms

2x^2+6x-20

Area of the rectangle is 2x^2+6x-20

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The chorus at an elementary school is made up on fifth and sixth graders. This year, the chorus had 12 fifth-grade girls, 9 fift
klemol [59]

Answer:

A: 19:26 B:7:8 C:26:45

Step-by-step explanation:

<u>Question A</u>

First to find the ratio between the boys and girls you would add all of the different groups with boys and girls. This would be done by,

<u>Boys</u>

9+10=19

<u>Girls</u>

12+14=26

Now that you have the total number of boys and girls you make this ratio,

19:26

That is the final answer

<u>Question B</u>

For this it is very similar to the boys to girls ratio. You still add the total on each side and then form a ratio. From before you would start by adding both of the different sides which would be done by,

<u>Fifth Graders</u>

12+9=21

<u>Sixth Graders</u>

14+10=24

Now that you have the total number of both of the different grades you make this ratio,

21:24

You can simplify this by finding the lowest common factor which would be

7:8

<u>Question C</u>

To answer this it is very similar to the first two but instead you will find one group and all of the groups to form the ratio. Now you need to add all of the people in each of the groups.

<u>Girls</u>

12+14=26

<u>All</u>

12+9+14+10=45

Now with the total number of both you will form a ratio

26:45

This is your final answer because you cant simplify this any further

8 0
3 years ago
Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?
soldi70 [24.7K]
The answer to this question is choice option letter C
7 0
4 years ago
Read 2 more answers
HELP PLEASE ASAP!!!!
Akimi4 [234]

Answer:

85°

Step-by-step explanation:

add 125+150=275

a circle is 360

so 275+85=360

4 0
2 years ago
The ratio of teachers needs to be 1:30. If there were 120 students, how many teachers would be needed?
mezya [45]

Answer:

4:120

Step-by-step explanation:

for 120 student they would be 4 teacher needed per 30 student

4:120

4 0
3 years ago
Select the correct answer. Which of the following is a solution to ? A. B. C. D. E.
Leni [432]

Answer:

the answer to your question is A

3 0
3 years ago
Read 2 more answers
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