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NikAS [45]
3 years ago
8

The population of a country in 1950 was 6.2X10^7. The population in 2030 is projected to be 3X10^2 times the 1950 population. If

the projection is correct, what will the population of the country be in 2030?
Mathematics
1 answer:
podryga [215]3 years ago
3 0
[6.2x10^7]x[3x10^2]
=1.86x10^10

The hint is in the question. All you do is times the projection in 2030 with 1950 population.

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A quadratic equation is shown below:
Valentin [98]
Part A)

The given equation is:

25 x^{2} +10x+1=0

The radicand or discriminant(d) of the equation will be:

d=(10)^{2}-4(25)(1) \\  \\ 
d=100-100 \\  \\ 
d=0

Since the discriminant is equal to 0, the given quadratic equation has only 1 root. In other words we can say the the given equation is a perfect square. 


Part B)

The given equation is:

4 x^{2} -4x+1=0

We can solve this expression by factorization. Factors of middle term are to be made in such a way that their product equals the product of first and third term and sum is equal to the middle term i.e. product should be 4x² and sum should be -4x.
So the two such terms are -2x and -2x. Using the factors and simplifying the equation by taking common we get:

4 x^{2} -2x-2x+1=0 \\  \\ 
2x(2x-1)-1(2x-1)=0 \\  \\ 
(2x-1)(2x-1)=0 \\  \\ 
(2x-1) ^{2}=0 \\  \\ 
2x-1=0  \\  \\ 
x= \frac{1}{2}
4 0
3 years ago
Brenda and Lynne cut shapes from
Fed [463]

Answer:

8

Step-by-step explanation:

32/4

8 0
2 years ago
Simplify (2n + 5) - (3n + 7) + (4n - 9). -3n - 11 3n - 11 -3n + 11 3n + 11
KATRIN_1 [288]
 <span>2n + 5 – (3n + 7) + 4n – 9
</span> <span>6n + 5 – (3n + 7) – 9
</span> <span>6n – 4 – (3n + 7)</span>
 <span>6n – 4 – 3n – 7
</span> <span>3n – 4 – 7
</span> <span>3n –11</span>


6 0
3 years ago
Which of the following represents the additive inverse of <img src="https://tex.z-dn.net/?f=2%2F3" id="TexFormula1" title="2/3"
PolarNik [594]
C)-2/3is the answer because when your have 2/3+-2/3 will equal 0 in which justifies the additive inverse
7 0
3 years ago
Read 2 more answers
I need help, does anyone understand this?
Mama L [17]

a so-called zero or solution is really just an x-intercept, in which case we set the dependent variable to 0, namely y = h(x) = 0 and solve for x to get it.

\bf h(x)=4x^2-8x-60\implies \stackrel{h(x)}{0}=4x^2-8x-60\implies \stackrel{\textit{dividing by 4}}{0=x^2-2x-15} \\\\\\ 0=(x-5)(x+3)\implies x= \begin{cases} 5\\ \boxed{-3} \end{cases}

why is -3 the smallest? well, -3 is much smaller than 5 :), the further to the left you go on the number line, the smaller the number.

4 0
3 years ago
Read 2 more answers
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