Answer:
C.
Step-by-step explanation:
So there are 20 kids with brown hair and this represents 80% of the class total.
So this means 20=.8n since we don't know the total number of kids.
20=.8n
Divide both sides by .8
25=n
So 25 is the total number of kids.
C. is the answer
You could also setup this equation given that 80% is 80/100:
[tex]\frac{20}{\text{ total }}=\frac{80}{100}
To figure out what that total is there you can divide top and bottom of the fraction on right hand side by 4 which gives you the 20 on top and the 25 on bottom.
It would be 42 ,because it is increasing by 3 on the third week=39 fourth week=42.
Answer:
y4 - 8y3 + 8y2 + 2y + 8
—————————————
2y2
Step-by-step explanation:
Step 1 :
4
Simplify ——
y2
Equation at the end of step 1 :
y y 4
(((((y2)+————)-((2•—)•y))+——)-4y)+4
(y2) 4 y2
Step 2 :
y
Simplify —
4
Equation at the end of step 2 :
y y 4
(((((y2)+————)-((2•—)•y))+——)-4y)+4
(y2) 4 y2
Step 3 :
y
Simplify ——
y2
Dividing exponential expressions :
3.1 y1 divided by y2 = y(1 - 2) = y(-1) = 1/y1 = 1/y
Equation at the end of step 3 :
1 y2 4
(((((y2)+—)-——)+——)-4y)+4
y 2 y2
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Answer:
d) y = x-12
Step-by-step explanation:
x is the input
y is the output
d) 4 = 16 - 12
