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4 years ago

X^2-2x-15=0 x^2-7x=18 4n^2=4n+36=0

Mathematics

1 answer:

Blizzard [7]4 years ago

8 0

Answer: oh this is hard

Step-by-step explanation: its b

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2.5% of what is 2.21?

Varvara68 [4.7K]

To get the answer do this:

2.5% of what is 2.21

2.5%x = 2.21

2.5/100x = 2.21

0.025x = 2.21

divide both sides by 0.025

0.025x/0.025 = 2.21/0.025

x = 88.4

8 0

3 years ago

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A rectangular plot of farmland will be bounded on one side by a river and on the other three sides by a single-strand electric

Luden [163]

Answer:

since the total amount of wire is not given, I looked for a similar question:

you have 800 yards of wire at your disposal

since we need to only calculate 3 sides of the land plot, our perimeter will be:

L + 2W = 800

area = L x W

L = 800 - 2W

now we replace:

area = (800 - 2W) x W = 800W - W²

we can write a quadratic equation:

area = -W² + 800W

the vertix of W = -b/2a

the coefficients of our quadratic equation are: -2 and 8

the vertix of W = -800 / (2 x -2) = -800 / -4 = 200 yards

width = 200 yards

length = 800 - (200 x 2) = 400 yards

maximum area enclosed = 200 x 400 = 80,000 sq yards

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3 years ago

7.5 meal; 6.5% tax PLS HELP ME!!!!!!

malfutka [58]

Answer:

$7.99

Step-by-step explanation:

6.5% of 7.5 = 0.4875

7.5 + 0.4875 = 7.9875 or about 7.99

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3 years ago

Q # 1 Graph the function Y = |X + 2| - 3

Svetllana [295]

First of all we know the Absolute Value Function that is:

$\left | x \right |= \left \{ {{x \ \ \ \ x \geq 0} \atop {-x \ \ \ \ x\ \textless \ 0}} \right.$

This is called the Parent Function of the Absolute Value Function.

From the equation:

$y=\left | x+2 \right |-3$

The term:

$\left | x+2 \right |$

means that the the Parent Function is shifted two units to the left.

On the other hand, the term:

$-3$

means that the function $\left | x+2 \right |$ is shifted three units downward. So the result is the graph shown below

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3 years ago

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In equation 1/4n+5=5 1/2 is equal to

Pie

I can’t see the picture

3 0

3 years ago