9514 1404 393
Answer:
5. 8 ft
6. y = 47x +110; 533 students in 2019
Step-by-step explanation:
4. Answered for you previously. See https://brainly.com/question/21087377.
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5.
Given:
triangular garden with base 7 ft and area 28 ft^2
Find:
height of the triangle
Solution:
The formula for the area of a triangle is ...
A = 1/2bh . . . . . where A is the area, b is the base length, and h is the height
Multiplying by 2/b, we can get a formula for the height. Using this formula, we can solve the problem.
h = 2A/b
We can let h represent the height, and fill in the given data.
h = 2(28 ft^2)/(7 ft)
h = 8 ft
The height of the triangle is 8 feet.
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6.
Given:
(0, 110), (5, 345) . . . . . where the points represent ...
(years after 2010, students using the hotline)
Find:
a linear model for the data
the number of students predicted for 2019
Solution:
The 2-point form of the equation for a line is ...
y = (y2 -y1)/(x2 -x1)(x -x1) +y1
where the points are (x1, y1) and (x2, y2). Using the given points, our linear model is ...
y = (345 -110)/(5 -0)(x -0) +110
y = 47x +110 . . . . the linear model, where ...
y is the number of students using the hotline
x is the number of years after 2010
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In 2019, x = 9, so y = ...
y = 47(9) +110 = 423 +110 = 533
The number of students predicted to use the hotline in 2019 is 533.
