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loris [4]
3 years ago
5

Pleas help me I really need it

Mathematics
2 answers:
RoseWind [281]3 years ago
5 0
Hello! I hope this helps you!

If you are to simplify the expression, you’d be getting the answer of:

8x-2
Elza [17]3 years ago
3 0

before distributing the negative:

(7x2 + 3x) - (8x2 - 5x)

after distributing the negative:

7x2 + 3x - 8x2 + 5x

now add like terms:

7x2 + 3x - 8x2 + 5x

-x2 + 8x

or

8x - x2

<em>-- let me know if you have any questions regarding this. </em>

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IVa wantd to train for a race by runing 10km ober 3 days uring the week. The first day she ran 1.37 km more than she aran on the
makkiz [27]

Answer: she ran 3.53km on the third day.

Step-by-step explanation:

Let x represent the number of miles that she ran on the second day.

The first day, she ran 1.37 km more than she ran on the second day. This means that the distance that she ran on the first day is

x + 1.37

On the third day, she ran 0.98 km more than the second day. This means that the distance that she ran on the third day is

x + 0.98

The total distance that she wants to run in 3 days is 10km. This means that

x + 1.37 + x + x + 0.98 = 10

3x + 2.35 = 10

3x = 10 - 2.35

3x = 7.65

x = 7.65/3

x = 2.55

The distance that she ran on the third day is

2.55 + 0.98 = 3.53 km

3 0
3 years ago
The formula for perimeter of a rectangular field is P = 2L + 2W.
Mariana [72]

Answer:

The length is 7 meters

Step-by-step explanation:

Formula: P = 2L + 2W

Plug in 24 for the perimeter and 5 for the width

New equation: 24 = 2L + 2(5)

Simplify: 24 = 2L + 10

Subtract 10 from both sides: 24 - 10 = 2L + 10 - 10

Simplify: 14 = 2L

Divide both sides by 2: L = 7

<u>Answer: L = 7</u>

3 0
3 years ago
An envelope has a perimeter of 30 inches. Its area is 50 square inches. What are the dimensions of the
Zina [86]

Answer:

10in by 5in

Step-by-step explanation:

PERIMETER: p=2(a+b) p=30

AREA: A=a×b A=50

2(a+b)=30

a×b=50

3 0
3 years ago
Read 2 more answers
In 2010 the population of alaska was about 710200.What ir this written in Word form
Mazyrski [523]

Answer:

Seven hundred and ten thousand two hundred.

Step-by-step explanation:

6 digits would mean it's 100k, so you just go from there. Write out the numbers in word form adding "hundred" and "thousand" as you must. This applies to all problems similar to this.

7 0
4 years ago
What is the value of x
topjm [15]

Answer:

x=32

Step-by-step explanation:

Since all triangles in a triangle add up to 180, we can do 180-116=64. There are 2 more blank angles so we can divide 64 by 2 to get 32. I think that x is 32, but please correct me if I am wrong. Everybody makes mistakes.

6 0
3 years ago
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