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Hitman42 [59]
4 years ago
11

How do I solve 5(4x -5) = 155

Mathematics
1 answer:
grandymaker [24]4 years ago
5 0
 <span> 5*(4*x-5)-(155)=0 
</span><span> 5 • (4x - 5) - 155 = 0
</span>  Pull out like factors :
20x - 180  =   20 • (x - 9)<span> 
</span> 20 • (x - 9) = 0  Solve :   <span> 20   =  0
</span>Solve  :    x-9 = 0<span> 
</span> <span>Add </span> 9  to both sides of the equation :<span> 
 </span>                     x = 9<span> 
</span>hope that helps!!
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ollegr [7]
We are asked to solve for the measurement of side BC in the given right triangle ΔABC and other side measurements were also given such as AB=1 and AC = 2. Since this is a right triangle, we can use and apply the Pythagorean theorem c²= a² + b² and the solution is shown below:
c = AC
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The answer for the length of BC is 1.732 units.
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3 years ago
10.5% of the population is 65 or older. Find the probability that the following number of persons selected at random from 25 peo
julia-pushkina [17]

Given:

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Probability of population is 65 or older is 10.5%.

This date follows the binomial distribution,

\begin{gathered} n=25,p=0.105 \\ X\rightarrow B(n=25,p=0.105) \end{gathered}

To find the probability that at most 2 are 65 or older,

\begin{gathered} P(X=x)=^nC_x(p)^x(1-p)^{n-x} \\ P(0\leq X\leq2)=P(X=0)+P(X=1)+P(X=2) \\ =^{25}C_0(0.105)^0(1-0.105)^{25-0}+^{25}C_1(0.105)^1(1-0.105)^{25-1}+^{25}C_2(0.105)^2(1-0.105)^{25-2} \\ =0.0625+0.1832+0.2579 \\ =0.5036 \\ \approx0.504 \end{gathered}

Answer: Probability is 0.504 .

8 0
1 year ago
4.9x 10^2 as a decimal number????
harkovskaia [24]

Answer:

490.0...

Step-by-step explanation:

4.9 x 10^2

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the easiest way to do this is to move the decimal 2 places to the right, as

10 x 10 = 100

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3 years ago
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pishuonlain [190]
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