A computer repairman makes $25 per hour. Which equation models the situation?

Mathematics

2 answers:

Rasek [7]2 years ago

6 0

Answer:

d = 25h (Option C)

Step-by-step explanation:

If he works h hours and makes $25/h then you must multiply them (25 and h) in order to find out how much he earned (d).

Leona [35]2 years ago

4 0

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Which equation represents a hyperbola with a center at (0,0), a vertex at (0,60), and a focus at (0,-65)

Leona [35]

Given that the hyperbola has a center at (0,0), and its vertices and foci are on y-axis. This, the equation of the hyperbola is of the form
x²/a²-y²/b²=-1 (a>0, b>0)
In the equation, vertices are (0, +/-b) .
Thus,
b=60
Foci (0,+/-√(a²+b²))
thus
√(a²+60²)=65
hence solving for a²
a²=65²-60²
a²=625
a²=25²
hence the equation is:
x²/25²-y²/60²=-1

7 0

3 years ago

Read 2 more answers

The ages of 11 students enrolled in an on-line macroeconomics course are given in the following steam-and-leaf display:

blsea [12.9K]

Answer:

The standard deviation of the age distribution is 6.2899 years.

Step-by-step explanation:

The formula to compute the standard deviation is:

$SD=\sqrt{\frac{1}{n}\sum\limits^{n}_{i=1}{(x_{i}-\bar x)^{2}}}$