Answer:
30
Step-by-step explanation:
let number of questions in the test be x
9 of the first 10 questions are correct
so only x-10 questions remain
3/10 of the (x-10) = 3/10(x-10) questions are correct
scored 50% for the whole test
so only half of x = x/2 questions are correct
combining the above:
9+3/10(x-10) = x/2
9+3/10x-3=x/2
9-3=(1/2-3/10)x
1/5x=6
x=30
Answer:
x = 34
Step-by-step explanation:
Add x+24 to both sides of the equation and simplify.
2 + 8 - x + x + 24 = -24 + x + 24
34 = x
A= 72°
B= 18°
C= 100°
Hope this helps and good luckkk :)
The answer is 4 1/6 because 4/1 + 1/6= 25/6 = 4 1/6.
Answer:
(0.4,6.2)
Step-by-step explanation:
set the equations equal, 3x+5=8x+3
solve for x, 5x=2, x=2/5 = 0.4
plug in x value to solve for y, y = 3*0.4 + 5, y=6.2
