Here is an example,
<span>The ratio of boys to girls in the class was 4:5. There were 24 people in the class. How many boys? How many girls?
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4:5 is the same as 4x:5x where 4x is # of boys and 5x is # of girls.
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Equation:
4x+5x = 24
9x = 24
x = 24/9
</span>
Answer:
x=0.0819/0.59
Step-by-step explanation:
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Given: 160.5 in²=area of paralellogram
7.5 in = height
b = ?
Let us work out for the missing base. Basically, the formula in finding the area of a parallelogram is A= b × h. Since base is missing, we will use b= A/h where, area is divided by the measure of the height.
so,
b= A/ h
= 160.5 inch² ÷ 7.5 inch
= 21.4 inch
Therefore base has the measure of 21.4 inches.
Check:
A= b × h
= (21.4 inch)(7.5 inch)
A= 160.5 inches²
<span> (a) if 1 woman is randomly selected, find the probability that her height is less than 64 in
using z-score formula:
z-score=(x-mu)/sig
(64-63.5)/2.8
=0.18
thus
P(x<64)=P(z<0.18)-=0.5714
B] </span><span> if 33 women are randomly selected, find the probability that they have a mean height less than 64 in
using the central limit theorem of sample means, we shall have:
2.8/</span>√33=0.49
since n>30 we use z-distribtuion
z(64)=(64-63.5)/0.49=1.191
The
P(x_bar<64)=P(x<1.191)=0.8830
1) 4.28
2) 14.05
3) 2 r 30
4) $22.65
5) 684
6) 124.05
~this was rlly hard~