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Svetlanka [38]
3 years ago
11

Solve for x. Round your answer to the nearest tenth. Remember, if your solving for the angle x, you must use the inverse functio

n

Mathematics
1 answer:
grigory [225]3 years ago
4 0

Answer:

42x12=??

Step-by-step explanation:

try to do that if not sorry

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The number n of people using the elevator in an office building every hour is given by n = t2 − 10t + 40. In this equation, t is
Morgarella [4.7K]

Answer:

The number of persons using the elevator at any hour is never going to be less that 15.

Step-by-step explanation:

To solves this you have to suppose that there are at least 15 persons on the elevator, and the equation is converted into an inequation:  

t^2-10t+40

Now you transform the inequation back to an equation to solve it:

t^2-10t+25=0

You need to know if there is any negative solution for the equation, to do this you can use the discriminant for a quadratic equation:

D=b^2-4ac

In this case, you have a=1, b=-10, c=25

D= (-10)^2-4(1)(25)\\D=0

Since the discriminant is 0 and a<0 the equation always is going to be positive. Therefore, the number of persons using the elevator at any hour is never going to be less than 15.

6 0
4 years ago
Find the area of the figure. If needed, round to the nearest tenth.
Umnica [9.8K]

Answer:

18 \:ft^2

Step-by-step explanation:

The area of a trapezoid.

(a+b)h\frac{1}{2}

(8+4)3 \times \frac{1}{2}

(12)3 \times \frac{1}{2}

36 \times \frac{1}{2}

=18

6 0
3 years ago
If the point (−5, −8) is reflected over the y-axis, what are the coordinates of the reflected point?
Komok [63]
I believe it would be (5,-8)
5 0
3 years ago
Why is the LCM always greater than the GCF?
AlladinOne [14]
Because the gcf is 12 and the lcm is 1000000000000000000000000000000000000000000000000000
5 0
3 years ago
emily is entering a bicycle race for charity. her mother pledges $0.40 for every 0.25 mile she bikes. if emily bikes 6 miles how
I am Lyosha [343]

Answer:

$9.60

Step-by-step explanation:

0.40(6/0.25)

0.40(24)

9.6

3 0
3 years ago
Read 2 more answers
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