2 years ago

Problem #5: (8 points)

Mathematics

1 answer:

Sauron [17]2 years ago

8 0

Tukuyin ang mga pahayag na naglarawan na nangangailangan ng kasagutan

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Milla and Luka are 3 kilometers apart and walking toward each other. Milla's average speed is 5 kilometers per hour and Luka's i

pantera1 [17]

It's B 5t+4t=3 thats the original answer

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2 years ago

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A ball is thrown from a height of 43 meters

AveGali [126]

When the ball will hit the ground, the height will be zero. So we need to replace $h$ with 0 in our equation, and solve for $t$ :
$0=43-4t-5t^{2}$
$-5t^{2}-4t+43=0$
To solve this equation we are going to use the quadratic formula: $t= \frac{-b(+/-) \sqrt{b^{2}-4ac} }{2a}$ .
From our height equation, we can infer that $a=-5$ , $b=-4$ , and $c=43$ . So lets replace those values in our quadratic formula to find $t$
$t= \frac{-(-4)(+/-) \sqrt{(-4)^{2}-4(-5)(43)} }{2(-5)}$
$t=- \frac{5}{8} - \frac{ \sqrt{713} }{8}$ or $t=- \frac{5}{8} + \frac{ \sqrt{713} }{8}$
$t=-3.96$ or $t=2.71$
Since time cannot be negative, $t=2.71$ is the solution of our equation.

We can conclude that the ball will hit the ground after 2.71 seconds.

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2 years ago

What is the simplified form of the ninth root of x times the ninth root of x times the ninth root of x times the ninth root of x

Tomtit [17]

Let's convert the task into an example, simplifyng which will make us able to get the answer.
So, according to the task: $\sqrt[9]{x} * \sqrt[9]{x} * \sqrt[9]{x} * \sqrt[9]{x} 

= \sqrt[1/ 9 ]{x} * \sqrt[1/9]{x} * \sqrt[1/9]{x} * \sqrt[1/9]{x}$

Now we can simplify: $\sqrt[1/9]{x} + 1/9+1/9+1/9

= x^{4/9}$

So the answer is <span>C:x to the four ninths power</span>

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2 years ago

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A number, y, is equal to twice the sum of a smaller number and 3. The larger number is also equal to 5 more than 3 times the sma

xenn [34]

Answer:

2 x minus y = negative 6 and 3 x minus y = negative 5

Step-by-step explanation:

y = 2(x+3) = 2x + 6 or 2x - y = -6

y = 5 + 3x or 3x - y = -5

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2 years ago

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Cristine's middle school has a total of 900 students and 45 teachers. The local high school has 110 teachers and a student-teach

frozen [14]

Write and solve an equation of ratios:

900 students 45 teachers
------------------ = -----------------
x 110 teachers

Cross multiplying, we get (900)(110) / 45, or

so x = # of students in the high school = 2200 (answer)

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2 years ago

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