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Anon25 [30]
3 years ago
5

Worth a lot of points

Mathematics
2 answers:
lara [203]3 years ago
6 0

Answer: -2, 2

Step-by-step explanation:

nikklg [1K]3 years ago
3 0

Answer:

Answer is B

Step-by-step explanation:

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Use interval notation to describe.<br><br> John is at least 26 years old.
andrezito [222]
John= greater than or equal to 26 (a >26 with a line under the symbol)
5 0
3 years ago
What is the area of a triangle that has a height of 6 feet and a base length of 7 feet?
frez [133]

Answer:

area = 21 feet^2

Step-by-step explanation:

Area of a triangle is 1/2(base*height)

1/2(6*7) = area

1/2(42) = area

area = 21 feet^2

6 0
3 years ago
Read 2 more answers
The length plus the width of a rectangle is 10. Let x represent the length. The equation for the area y of the
yuradex [85]

Answer:

length of rectangle = 5

width of rectangle = 5

Area of rectangle = 25

Step-by-step explanation:

Since the length of the rectangle is "x", and the value of the area is given by the product of the length "x" times the width "10-x", indeed, the area "y" of the rectangle is given by the equation:

y=x\,(10-x)=10x-x^2

Now, they tell us that the area of the rectangle is such that coincides with the maximum (vertex) of the parabola this quadratic expression represents. So in order to find the dimensions of the rectangle and therefore its area, we find the x-coordinate for the vertex, and from it, the y-coordinate of the vertex, which is the rectangle's actual area.

Recall that the formula for the x of the vertex of a quadratic of the form :

y=ax^2+bx+c

is given by the formula:

x_{vertex}=-\frac{b}{2\,a}

which in our case gives:

x_{vertex}=-\frac{b}{2\,a}\\x_{vertex}=-\frac{10}{2\,(-1)}\\x_{vertex}=5

Therefore, the length of the rectangle is 5, and its width (10-x) is also 5.

The area of the rectangle is therefore the product of these two values: 5 * 5 = 25

Which should coincide with the value we obtain when we replace x by 5 in the area formula:

y=10x-x^2\\y=50-(5)^2\\y=50-25\\y=25

8 0
3 years ago
A salesperson earns a salary of $40,000 per year plus 7% commission on sales of $120,000. what is his total income?
lesya [120]
40,000 + 0.07(120,000) =
40,000 + 8,400 =
$ 48,400 per year <===
5 0
3 years ago
Which triangle is a 30° -60° -90° triangle?
Fittoniya [83]

Answer:

Acute isosceles triangle

Step-by-step explanation:

because an acute angle is more than 45 but less then 90.

that's all i know sorry!

5 0
3 years ago
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