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Oxana [17]
3 years ago
6

Solve for x using the distributive property. 9(5 - x) = 81 x = [?]

Mathematics
1 answer:
Ilya [14]3 years ago
8 0

Answer:

\boxed {x = -4}

Step-by-step explanation:

Solve for the value of x:

9(5 - x) = 81

-Use <u>Distributive Property</u>:

9(5 - x) = 81

45 - 9x = 81

-Subtract 45 to both sides:

45 - 45 - 9x = 81 - 45

-9x = 36

-Divide both sides by:

\frac{-9x}{-9} = \frac{36}{-9}

\boxed {x = -4}

So, the value of x is -4.

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Step-by-step explanation:

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6 0
3 years ago
Question 1
Tanzania [10]

Answer:

Mortality rate is 0.5 per 1000 habitant

the number of deaths have increased (from 210 to 250)

Step-by-step explanation:

Hello

Mortality rate is the number of deaths in a specific population,usually expressed in units of deaths per 1,000 individuals per year

Mortality\ rate\ (S)= \frac{(D)}{(P)} *10^{n} \\\\\\\\

where

S=Mortality rate

D=deaths

P= population

n= is a conversion form ,such as multiplying by  10^{3}=1000, to  get mortality rate per 1,000 individuals( we will use n=3)

step 1

asign

S=unknown

D=250

P=500000

n=3, (for each  1000 people)

step 2

Replace

S=\frac{250}{500000}*1000\\S=\ 0.5\ per\ 1000

Mortality rate is 0.5 per 1000 habitant

step 3

what if S=0.42

S=0.42(assuming it is 0.42 per 1000,n=3)

D=unknown

P=500000

(S)= \frac{(D)}{(P)} *10^{n}\\\\isolatin D\\\\S*P=D*10^{n}\\ D=\frac{S*P}{10^{n} } \\\\and\ replacing\\\\D=\frac{(0.42)*(500000)}{10^{3} }\\\\ Deaths=210\\

the number of deaths have increased (from 210 to 250)

Have a great day

5 0
3 years ago
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