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ExtremeBDS [4]
3 years ago
14

Need help, please explain the answer

Mathematics
1 answer:
stellarik [79]3 years ago
7 0

Answer:

7 - x meters

Step-by-step explanation:

This is a difference of squares. The formula for difference of squares is

a^2-b^2 = (a-b)(a+b)

So plug the numbers we know into this formula.

Area = lw

49 - x^2 = (a-b)(7+x)

49 - x^2 = (7-x)(7+x)

<u>The length is 7 - x meters.</u>

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algol13

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4 0
3 years ago
Later, Alexis is looking at a different set of coins: this time only dimes and nickels. She has twice as many nickels as dimes,
musickatia [10]

9514 1404 393

Answer:

  • 16 dimes
  • 32 nickels

Step-by-step explanation:

Consider a group of 1 dime and 2 nickels. The value of it is 0.20. The total value of all such groups is 3.20, so there must be ...

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5 0
2 years ago
Find the perimeter of a rectangle whose length is 18 m and breadth is 5 m
IrinaVladis [17]

Answer:

46m

Step-by-step explanation:

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3 0
2 years ago
Read 2 more answers
Two shirts and one tie costs $42, but one shirt and two ties cost $39. What does one shirt cost?
amid [387]
Let s = shirts
let t = ties
2s + t = 42
s + 2t = 39
s = 15
t = 12
one shirt equals $15
3 0
3 years ago
Combine like terms. What is a simpler form of the expression
pickupchik [31]

First, distrbute -3 to both -4y and 3

-3(-4y) = 12y  -> note that two negatives multiplied = one positive answer

-3(3) = -9      -> note that one negative and one positive = one negative answer

12y - 9 + 7y  -> combine like terms

12y + 7y - 9

19y - 9 -> answer

Your answer is 19y - 9

hope this helps

~Crystal

3 0
3 years ago
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