Answer:
x=5
Step-by-step explanation:
write x - 4 as a fraction with denominator = 1
5/x = (x - 4)/1
Now cross multiply
x(x - 4) = 5 multiply out and collect all terms on the left side of the equal sign
x2 - 4x - 5 = 0 factor the quadratic into two binomials
(x - 5)(x + 1) = 0 the product of two numbers = 0 when either number is zero
Therefore x = 5 or x = -1
45 + ( 10 / 100 ) * 45 = 49.5 > 45 No
40 + ( 5 / 100 ) * 40 = 42 < 45 Yes
50 - ( 20 / 100 ) * 50 = 40 < 45 Yes
36 + ( 15 / 100 ) * 36 = 41.4 < 45 Yes
Answer:
69.44%
Step-by-step explanation:
136 girls. 309 boys
309/445 = .69438
.69438 * 100 = 69.44%
11a:
3x+5=5x-57
3x-5x=-57-5
-2x=-62
x=31
11b:
2x+2x+4x+150+4x+150=360
12x+300=360
12x=360-300
12x=60
x=5
hope this helped !!
9514 1404 393
Answer:
110%
Step-by-step explanation:
The whole left square is shaded, so that is 100%.
The right square is divided into 10 equal parts, so each one is 100%/10 = 10% of the whole. One of those is shaded.
The whole amount shaded is ...
100% + 10% = 110%
