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hoa [83]
3 years ago
14

Plz answer only if correct!!

Mathematics
1 answer:
yaroslaw [1]3 years ago
6 0
Angle a is 55 X is -12
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If I work two days and get paid 7.25 an hour how much is that
PtichkaEL [24]
The answer is 348.00. You have to multiply 7.25 by 24 and then use the product and double it.
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3 years ago
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The square of a certain negative number is equal to five more than one-half of that number. What is the number?
Goryan [66]
The answer is -2 yes das right
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A triangle has sides which are consecutive odd integers and an
wolverine [178]

Answer:

Perimeter = 15

Step-by-step explanation:

We are told that the length of each of the 3 sides of the triangle are consecutive odd integers.

Thus means that we can write the 3 terms as;

(x - 2), x, (x + 2)

Thus, perimeter is;

P = (x - 2) + x + (x + 2)

P = 3x

If an angle is 120°, it means that the corresponding side that is directly opposite the angle is the largest side of the triangle.

Thus, this side is (x + 2)

Using cosine rule, we have;

(x + 2)² = x² + (x - 2)² - 2(x(x - 2))cos 120

Expanding, we have;

x² + 4x + 4 = x² + x² - 4x + 4 - (2x² + 4x)(-½)

This reduces to;

4x = x² - 4x + x² - 2x

2x² = 10x

2x = 10

x = 10/2

x = 5

Thus, other sides are;

(x - 2) = 5 - 2 = 3

And (x + 2) = 5 + 2 = 7

So,perimeter is;

P = 3x = 3 × 5 = 15

8 0
3 years ago
A point moves along a straight path. The function f ( t ) = log 2 ( t ) determines the distance (in meters) the point has travel
Marina CMI [18]

Answer:

a) 4.392317 mt

b) 9 seconds

c) \large f^{-1}(d)=2^d\;sec.

Step-by-step explanation:

We have

\large f(t)=log_2(t)

where t is given in seconds and t in meters.

<em>a)How far has the point traveled 21 seconds after it started moving?</em>

By replacing t=21 in our equation we get

\large f(21)=log_2(21)=4.392317 \;mt

<em>b)If the point has traveled 3.16993 meters, how many seconds have elapsed since it started moving?</em>

We need to find a t such that f(t) =3.16993.  

This can be accomplished by using the definition of log_2

\large f(t)=3.16993\rightarrow log_2(t)=3.16993\rightarrow t=2^{3.16993}=9\;sec.

<em>c)Write a function f^{-1} that determines the number of seconds that have elapsed since the particle started moving in terms of the distance (in meters) the particle has traveled.</em>

f^{-1} is given by the definition of log

\large f^{-1}(d)=2^d\;sec.

5 0
3 years ago
20 out of the 80 students in Quad 6A have no sibling. What is the fraction of students have no siblings? (simplify the fraction)
I am Lyosha [343]

Answer:

¼

Step-by-step explanation:

20 ÷ 80 = 0.25

0.25 = ¼ or 1 quarter

3 0
2 years ago
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