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charle [14.2K]
3 years ago
5

What number must be added to the expression below to complete the square ? x2+7x

Mathematics
1 answer:
stellarik [79]3 years ago
6 0

Answer:

you must add 2 to the equation

Step-by-step explanation:

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How do I find the domain n range of this graph​
motikmotik

Domain = {-3, 2}

Range = All real numbers

We can represent the range in interval notation as (-\infty, \infty) which is basically saying -\infty < y < \infty. The range is all real numbers due to the arrows meaning the graph extends up and down forever. So any y value is possible.

Notice with the domain we only have 2 valid x values -3 and 2. No other x values are allowed. Normally we use an interval of some kind to set up the domain, but we only have a set of values instead. The curly braces indicate "set".

7 0
3 years ago
|18-x|, if x&lt;18. Pls help
damaskus [11]

Answer:

I18 - xI such that x < 18.

ok, first let's what happens if x = 18:

I18 - xI = I18 - 18I = 0

So, at the moment we have the condition:

I18 - xI > 0.

now, if x is a really large negative number, suppose, x = -100

I18 + 100I = I118I = 118

So, as x can freely move in the negative range, we can see that I18 - xI can be any positive number, so the only restriction that we have is:

I18 - xI > 0.

This means that the domain is:

D = (-∞, 18)

and the range is:

R = (0, ∞)

3 0
3 years ago
Katie is getting her laundry done it cost $2.25 per square foot of flowers added to the yard if she wants 12.4 ft.² of flowers h
7nadin3 [17]

Answer:

Katie needs to pay $27.9.

Step-by-step explanation:

Given;

Cost of per foot = $2.25

Number of  flowers in her yard = 12.4 square foot

We need to find how much she needs to pay.

Solution:

Now we know that;

1\ ft^2 = \$2.25

So for 12.4 ft^2 = Cost for 12.4 ft^2 .

By using Unitary method we get;

Cost for 12.4 ft^2 = 2.25\times12.4= \$27.9

Hence Katie needs to pay $27.9.

5 0
3 years ago
How do i find the are and perimeter of the composite figure?
sineoko [7]

Answer:

perimeter :

4+10+4+ (pi * radius) .........."radius =5"

area:

(10*4)+(0.5 * pi * r square)

7 0
3 years ago
What all sets does 4/5 belong too? Natural, whole, integer, rational, irrational, real?
Lera25 [3.4K]

Answer:

Real, rational

Step-by-step explanation:

7 0
3 years ago
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