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Elena-2011 [213]
3 years ago
10

What is the solution to this equation?

Mathematics
2 answers:
tresset_1 [31]3 years ago
8 0

Answer:

x = 9

Step-by-step explanation:

First, we want to isolate variable x on the left side of the equation. We can do this by adding 13 to both sides.

x - 13 + 13 = - 4 + 13

x = 9

Anit [1.1K]3 years ago
4 0

Answer:

x=9

Step-by-step explanation:

to find the answer, add 13 to both sides of the equation.

x-13=-4\\ +13 = +13 \\x=9

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Determine if √4 is rational or irrational and give a reason for your answer.
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Answer:

rational

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Because if you take the square root of 4 you get 2

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3 years ago
The following graph represents the hourly commission of a home appliance salesperson, y, based on the number of salespeople that
grandymaker [24]

We have been given graph of a downward opening parabola with vertex at point (6.5,42.25). We are asked to write equation of the parabola in standard form.

We know that equation of parabola in standard form is f(x)=ax^2+bx+c.

We will write our equation in vertex form and then convert it into standard form.

Vertex for of parabola is y=a(x-h)^2+k, where point (h,k) represents vertex of parabola and a represents leading coefficient.

Since our parabola is downward opening so leading coefficient will be negative.

Upon substituting coordinates of vertex and point (0,0) in vertex form, we will get:

0=-a(0-6.5)^2+42.25

0=-a(42.25)+42.25

-42.25=-a(42.25)+42.25-42.25

-42.25=-42.25a

a=1 Divide both sides by -42.25

So our equation in vertex form would be f(x)=-(x-6.5)^2+42.25.

Let us convert it in standard from.

f(x)=-(x^2-13x+42.25)+42.25

f(x)=-x^2+13x-42.25+42.25

f(x)=-x^2+13x

Therefore, the equation of function is standard form would be f(x)=-x^2+13x.

3 0
4 years ago
Que alguien me ayude cuanto hace q yo sali de escuela​
swat32

Answer:

a=20 m²

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400=a²

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784+b²=1225

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b²=441

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C) c²+15²=39²

c²+225=1521

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c=√1296

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7 0
3 years ago
at 2 P.M the level of the water in the pool was 10 feet. At 6 P.M the level of water was 2 feet. Find the constant rate of chang
Anna35 [415]
Decreases by 2ft every hour

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