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Vesna [10]
3 years ago
10

78=6 f please help solve ion have much time

Mathematics
1 answer:
svet-max [94.6K]3 years ago
4 0

Answer:

hii

Step-by-step explanation:

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the first 50 miles of the drive is easy, while the last 68 miles of the drive is filled with curves. they drive at an average of
gavmur [86]
For first 50 miles:-
x + 9  = 50 / t       where x is average speed for the last 68 miles and t = time taken for the first 50 miles.

For the second 68 miles:-
x =  68 / (3 - t) 

Substitute for x in first equation:-
68 / (3 - t) + 9 = 50/t
68t + 9t(3 - t) = 50(3 - t)
68t + 27t - 9t^2 = 150 - 50t
9t^2 - 145t  + 150 = 0
t = 1.111 , 15  (ignore the 15 hours as total time = 3).
so the speed for the first 50 miles = 50 / 1.111 =  45 miles per hour Answer


8 0
4 years ago
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Boris bought 5 CDs that were each the same price. Including sales tax, he paid a total of $59.50. Each CD had a tax of $0.70. wh
Taya2010 [7]

Answer:

$8.40

Step-by-step explanation:

7 0
3 years ago
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A store sells 5 bananas for $1.80. How much will 9 bananas cost?
tiny-mole [99]

Answer:

3dollars

Step-by-step explanation:

easy

7 0
3 years ago
Which one?????? i need help
borishaifa [10]
<h3>Given</h3>

x + 2 ≥ 6

<h3>Find</h3>

the graph for the solution

<h3>Solution</h3>

We can solve for x by subtacting 2 from both sides of the inequality.

... x + 2 -2 ≥ 6 -2

... x ≥ 4 . . . . . . . . . . simplify

The answer is read, "x is greater than or equal to 4." This means the solution is those real numbers that are to the right of 4 on the number line, and including 4 on the number line. Numbers to the left of 4 are <em>not included</em>. The inclusion of the number 4 is shown by putting a solid dot there (not an open circle).

The appropriate choice is the 3rd one.

5 0
3 years ago
A swimming pool has a radius of 8 feet and a height of 5 feet. The swimming pool is shaped like a cylinder. What is the volume o
Eva8 [605]

Answer:

1005cm³

Step-by-step explanation:

8² x 3.14 = 200.96 = surface area of face

200.96 x 5 = 1004.8 = 1005cm³

4 0
4 years ago
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