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3 years ago

3x squared minus 12x=-54

Mathematics

1 answer:

Alex777 [14]3 years ago

7 0

◆ Quadratic Equations ◆

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A population of 200 animals is decreasing by 4% per year. At this rate, in how many years will the population be less than 170?

djyliett [7]

The population will be less that 170 in 4 years

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3 years ago

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NEED HELP ASAP!!!!!!!!!

svlad2 [7]

Answer:

Step-by-step explanation:

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2 years ago

5 oranges cost $2. Find the cost of 20 oranges.

Sonja [21]

<h3>Answer: $8</h3>

===================================================

Work Shown:

(5 oranges)/(2 dollars) = (20 oranges)/(x dollars)

5/2 = 20/x

5x = 2*20 .... cross multiply

5x = 40

x = 40/5 .... dividing both sides by 5

x = 8

20 oranges cost $8

--------------

Another way to approach the problem is to note that the jump from "5 oranges" to "20 oranges" is "times 4".

5*4 = 20

So we'll apply the "times 4" operation to the old cost of $2 to get the new cost being 2*4 = 8 dollars

4 0

3 years ago

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Help me plz Find the slope of a line parallel to the given line y=-3/2x

mylen [45]

Answer:

The slope of a line parallel to the given line is m = -3/2.

Step-by-step explanation:

Here, the given equation is $y = -(\frac{3}{2} )x$

The given equation is of the form y = mx + C : where m is the slope and C is y-intercept.

Here, comparing m = (-3/2) and C = 0

So, slope of the given equation is m = -(3/2)

Also, two equations are said to be parallel if they have equal slopes.

⇒Slope of the line parallel to the given equation: m = (-3/2)

Hence, the slope of a line parallel to the given line is m = -3/2.

6 0

3 years ago

Given: ΔKLM, KL = LM = 13in, KM = 10in. Find: The area of ΔKLM.

KengaRu [80]

Answer:

$60 in^{2}$

Step-by-step explanation:

We are given a ΔKLM, in which KL=LM=13 in and KM=10 in which means two sides of the given triangle are same and thus is an isosceles triangle.

Its median drawn from L to the KM will be altitude. Therefore, ΔKLN and ΔLMN are right triangles.

In ΔKLN, using the pythagoras property, we have

$13^{2}=5^{2}+LN^{2}$

$169-25=LN^{2}$

$\sqrt{144} =LN$

$12=LN$

Now, Area of triangle= 1/2×base×height

=1/2×10×12

=60 squared inches.

4 0

3 years ago