Answer:
divide perimeter by 3
Step-by-step explanation:
all 3 sides of an equilateral triange are equal, so you can divide the perimeter by 3 to get the length of one side
Answer:
Step-by-step explanation:
Here, we have the known angle sandwiched between two known sides.
So, we have SAS.
And we want to find the side opposite to the angle.
Therefore, we can use the Law of Cosines:
Again, it is important what we substitute.
a and b are the two side lengths. So, we will substitute 8 for a and 13 for b.
C is our angle. So, substitute 64 for C.
And c is what we’re trying to solve.
Therefore:
Simplify:
Add:
Take the square root of both sides:
Use a calculator. So, c is approximately:
The c is our y. So, y is approximately 11.9 units.
Answer: x=4, y=1
Step-by-step explanation:
Because y=y, you can make an equation that is -x+5=2x-7. Then add the x to the right side, so it would be 5=3x-7. Then add the 7 to the left side to get all of the numbers in one place. So it would be 12=3x. Divide by 3 on both sides and you get x=4. Then plug x into either one of the original equations. Both equations should get you the same answer for y. Y=-4+5. Y=1. And the other equation. Y=2x-7, y=8-7. Y=1
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Answer:
no. of $10 bill =2
no. of $5 bill = 3
no. of $1 bill = 5
Step-by-step explanation:
Let the no. of $10 bill be x
Total value of $10 bill = $10*no. of $10 bill = $10x
Given that
Tanya has one more $5 bill than $10 bills
Thus, no. of $5 bill = x+1
Total value of $5 bill = $5*no. of $5 bill = $5(x+1)
Also Given
she has two more $1 bills than $5 bills
no. of $1 bill = no. of $2 bill + 2 = x+1+2 = x+3
Total value of $2 bill = $2*no. of $2 bill = $1(x+3).
Therefore, total value of all the bill sin terms of x
= 10x + 5(x+1) + 1(x+3)
Given that she has total of $40,
then
10x + 5(x+1) + 1(x+3) = 40
10x + 5x+5 + x+3 = 40
=> 16x + 8 = 40
=> 16x= 40-8=32
=> x = 32/16= 2
Thus,
no. of $10 bill = x = 2
no. of $5 bill = x+1 = 2+1= 3
no. of $1 bill = x+3 = 2+3=5
