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3 years ago

I NEED HELP ASAP!!! files attached - parallelograms (numbers 19 and 20)

Mathematics

1 answer:

Minchanka [31]3 years ago

5 0

Number 19:
1= 54
2= 102
3= 54

Number 20:
1= 60
2= 60
1=
2=

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Please guys help to solve this problem

liq [111]

9514 1404 393

Answer:

300

Step-by-step explanation:

Since nobody failed, the number who passed one or the other was 100%.

P(O + W) = P(O) +P(W) -P(O&W)

100% = 80% +70% -P(O&W)

P(O&W) = 50% = 150 students

If 150 students are 50% of the examinees, then 100% will be 300 students.

6 0

3 years ago

Read 2 more answers

Clara has 6x - 7 pairs of shoes while Daniel has 2x + 3 pairs of shoes. How many more pairs of shoes does Clara have than Daniel

ale4655 [162]

Step-by-step explanation:

This is a binomial subtraction problem.

(6x-7)-(2x+3)

Binomial subtraction problems require one to phrase the problem as addition by flipping the signs.

(6x-7)+(-2x-3)

Now we can simplify:

6x-7-2x-3

4x-7-3

4x-10

So the answer is 4x-10 more pairs of shoes than Daniel.

See if that works.

Hope this helps!

8 0

3 years ago

According to recent UN figures, the annual gun homicide rate is 62.4 per one million residents in the US and 1.3 per one million

ss7ja [257]

Answer:

$P_D=61.1*10^{-4}$

$R_r=480$

Step-by-step explanation:

From the question we are told that

Homicide rate in US $R_U=62.4\ per\ one\ million$

Homicide rate in Britain $R_B=1.3\ per\ one\ million$

Generally the equation for probability of homicide is mathematically given as

$P=\frac{R}{10^6}$

Generally the equation for probability of homicide in US is mathematically given as

$P_U=\frac{62.4}{10^6}$

$P_U=62.4*10^{-4}$

Generally the equation for probability of homicide in Britain is mathematically given as

$P_B=\frac{1.3}{10^6}$

$P_B=1.3*10^{-5}$

a)Generally the difference b/w the probabilities P_D is mathematically given as

$P_D=P_U-P_B$

$P_D=62.4*10^{-4}-1.3*10^{-5}$

$P_D=61.1*10^{-4}$

Therefore US annual homicide is $P_D=61.1*10^{-4}$ greater than Britain's

b)Generally the Relative risk is R_r is mathematically given as

$R_r=\frac{P_U}{P_B}$

$R_r=\frac{62.4*10^{-4}}{1.3*10^{-5}}$

$R_r=480$

3 0

3 years ago

Ight so the pyramid has a square base of 18 inches on each side. It has a surface area of 864 square inches Whats the slant heig

34kurt

The answer is 48 so D

8 0

3 years ago

If a rectangle is altered by increasing its length by 20 percent and its width by 10 percent, its area increases by a percent. W

aleksklad [387]

Answer:

Step-by-step explanation:

Remember that the formula for the area of a rectangle is:

$A=lw$

Where l is the our length and w is our width.

If we increase our length by 20%, this means that we add 20% or 0.2 of our old length to our old length. So, our new length will be:

$l_{new}=l+.2l$

Combine like terms:

$l_{new}=1.2l$

Similarly, if we increase our width by 10%, this means that we add 10% or 0.1 of our old width to our old width. So, our new width is:

$w_{new}=0.1w+w$

Combine like terms:

$w_{new}=1.1w$

Therefore, our new area will be:

$A_{new}=(l_{new})(w_{new})$

Substitute 1.2l and 1.1w. This yields:

$A_{new}=1.2l(1.1w)$

Multiply:

$A_{new}=1.32lw$

Our old area is:

$A_{old}=lw$

So, our area increased by a factor of 1.32.

This is the same as 32% of our old area.

So, our answer is D.

And we're done!

5 0

4 years ago