Answer:
1) a=

2) b=

Step-by-step explanation:
To find y :
-x+y= 1
Take this equation as (1)
3x-y= 5
Take this equation as (2)
-3x + 3y = 3
Take (1) and multiply x to make it the same as 3x from (2)
3x - y = 5
Keep (2) the same
3x- 3y = 3
Make 3x in (1) positive
3x - 3y = 3
- 3x - y = 5
Minus (2) from (1) to factor out x
- 4y = - 2
After minus
4y = 2
Cancel out the minus
y =

Bring 4 to the other side and divide 2 by 4
To find x :
- x + ( 1/2) = 1
substitute y with its value
- x = 1/2
bring 1/2 to the other side and minus from 1
x = - 1/2
bring the negative sign to the other side
Answer:
C) 25
Step-by-step explanation:
First, solve for the height (red dotted line) using the Pythagorean theorem 9²+b²=15²
81+b²=225
b²=225-81
b²=12
Then set up a ratio.
x/12=9/15
simplify
x/12=3/5
cross-multiply
3x=60
x=20
This gives us the base. Now we can solve for x using the Pythagorean theorem again.
20²+15²=x²
400+225=x²
625=x²
√x²=√625
x=25
Y = 8/cos60 = 16
x = sqr(16^2 + 8^2) = 8sqr(3) = 13.86 approx
Answer:
20.5% = 0.205
900 * 0.205 = $184.50
His commission was $184.50
Brainly plz :)
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