B -23 because adding two negatives keeps the negative on. So add the numbers like positives and then re-add the negative back on
Answer:
Step-by-step explanation:
Ummm, y = mx+b is called the slope-intercept form because you can just read them off:
slope = m
y-intercept = b
Now can you pick a choice?
Answer:
25%
Step-by-step explanation:
Total= 40 students
boys +girls= 40
30 +girls= 40
number of girls
= 40 -30
= 10
Percentage of girls

Alternatively,
percentage of girls
= 100% -(percentage of boys)

Answer: 
Step-by-step explanation:
<em>Area of trapezium = </em>
2X = 2 + 2 = 4 cm
2Z = 5 + 5 = 10 cm
Y = 5 cm

|
|--------> 35 
Step-by-step explanation:
step 1. the cube root is also to the 1/3 power
step 2. (27a^3b^7)^(1/3) = (3*3*3*a*a*a*b*b*b*b*b*b*b)^(1/3)
step 3. a third root: 3 factors in the root comes "out" of the root as 1
step 4. 3ab*b(b)^(1/3) = 3ab^2(b)^(1/3).