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Effectus [21]
3 years ago
15

SAVE ME HELPPPPPPPP

Mathematics
1 answer:
valentina_108 [34]3 years ago
6 0

Answer:

By changing 0.65 miles into fraction we got 65/100 and it's simplest form is 13/20 .

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A music store bought a CD set at a cost of $20. When the store sold the CD set, the percent markup was 35%. Find the selling pri
lbvjy [14]

Answer:

30.8 I believe is your answer

Step-by-step explanation:

5 0
3 years ago
What is the slope of the line shown in the graph? <br> A. 2/3<br> B. -2/3<br> C. 3/2<br> D. -3/2
nataly862011 [7]

Answer:

A

Step-by-step explanation:


3 0
3 years ago
Barbara drives between Miami, Florida and West Palm Beach, Florida. she drives 45 miles in clear weather and then encounters a t
WINSTONCH [101]

Answer:

Barbara's speed in clear weather is 60mph and in the thunderstorm is 38mph.

Step-by-step explanation:

Let v_1 be the speed and  t_1 be the time Barbara drives in clear weather, and let v_2 be the speed and t_2 be the time she drives in the thunderstorm.

Barbara drives 22 mph lower in the thunderstorm than in the clear weather; therefore,

(1). v_2 = v_1 -22

Also,

(2). v_1t_1 = 45miles

(3). v_2 t_2 = 57,

and

(4). t_1+t_2 = 2.25hr

From equations (2) and (3) we get:

t_1 = \dfrac{45}{v_1}

t_2 =\dfrac{57}{v_2}

putting these in equation (4) we get:

\dfrac{45}{v_1}+\dfrac{57}{v_2}=2.25

and substituting for v_2 from equation (1) we get:

\dfrac{45}{v_1}+\dfrac{57}{v_1-22}=2.25

This equation can be rewritten as

2.25v_1^2-151.5v_1+990=0

which has solutions

v_1 = 60

v_1 = 7.33

We take the first solution v_1 =60 because it gives a positive value for v_2:

v_2 = v_1 -22

v_2 = 60 -22\\

v_2 = 38.

Thus, Barbara's speed in clear weather is 60mph and in the thunderstorm is 38mph.

4 0
3 years ago
Solve for n or d27/36=n/4
Vlada [557]
27/36 = n/4
27*4 = 36n
108 = 36n
108/36 = 36n/36
n = 3
5 0
3 years ago
How would I do this? Please explain instead of just giving me the answer.
djverab [1.8K]
According to the Pythagorean theorem, the square of the hypotenuse (the longest side) of a right-angled triangle equals to the sum of the squares of the other two sides. In this case, the ladder is the hypotenuse, which equals to the distance between the bottom of the ladder and the tree + the distance we want to find (x):
5² + x² = 13²
25 + x² = 169
x² = 144
x = √144 = 12.
The distance between the ground and the top of the ladder is 12 ft.

4 0
3 years ago
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