Answer:
she can't.
Step-by-step explanation:
13456.44/36=373.79
Answer:
8
Step-by-step explanation:
The numbers are 6 and 2x, then:
- 1/6 + 1/(2x) = 7/24
- 1/3 + 1/x = 7/12
- (x+3)/(3x) = 7/12
- 12(x+3) = 7*3x
- 12x + 36 = 21x
- 21x - 12x = 36
- 9x = 36
- x = 4
The other number is 2*4 = 8
Silver = 10%
Gold = 90%
Amount of gold to be deducted
90/100 × 18 = 16.2 g
75/100 × 18 = 13.5
16.2 - 13.5 = 2.7
Amount o silver to added.
2.7 × 5 = 13.5
Answer = 13.5 g
71) The triangle is isos. so the base angles are congruent
2a+b=5b-3a
5a=4b
The angles of a triangle all add up to 180
180=5a -2b + 2a +b + 5b -3a
180=4a+4b
Substitute 4b with 5a
180=4a+5a
180=9a
a=20
And substitute a into the equation: 5a=4b to solve for b and solve for the measurements of the angles
72) Angles that are supplementary add up to 180
8(y-x)+124=180
9x-2y+124=180
8x-8y=56
(9x-2y=56)4
Use elimination to solve for the variables
8x-8y=56
-(36x-8y=224)
-28x=-168
x=48
Substitute x into the other equation to solve for y and find the measurements of the angles
You can divide the 7.85 by 5 and then times it by 4 to get the final answer:
7.85/5 = 1.57
1.57*4 = 6.28
The answer is $6.28,
Hope this helps! :)