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PIT_PIT [208]
3 years ago
5

Please help and thank you

Mathematics
2 answers:
sesenic [268]3 years ago
7 0

The answer is B...

On the first day he spends 30 minutes training.. after that he is spending 10 minutes extra.. so on day two he would spend 40 minutes.. then day three.. 50 minutes.. day four.. 60 minutes and so on... The answer would be <em><u>B</u></em> though.

Lunna [17]3 years ago
4 0

Answer: B. 8th day: 100 minutes; 9th day: 110 minutes; 10th day: 120 minutes

Remember:

a_{n} = nth term

n = number of terms

a_{1} = first term

d = common difference

Identify the given information.

a_{1} = 30\\d = 10

Choose which formula to use. In this case, you should use the explicit formula for arithmetic sequences.

a_{n} = a_{1} + d(n - 1)

Substitute in the given values and simplify.

a_{n} = 30 + 10(n - 1)\\a_{n} = 30 + 10n - 10\\a_{n} = 10n + 20

Substitute in 8, 9, and 10 for n to find out how many days Rick would train on the 8th, 9th, and 10th day of training.

a_{8} = 10(8) + 20 = 80 + 20 = 100\\a_{9} = 10(9) + 20 = 90 + 20 = 110\\a_{10} = 10(10) + 20 = 100 + 20 = 120

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Two cars leave towns 760 kilometers apart at the same time and travel toward each other. One car's rate is 12 kilometers per hou
zaharov [31]

Answer:

89 km/hr

Step-by-step explanation:

Distance = Rate(speed) × Time

D = R × T

T = 4 hours

One car's rate is 12 kilometers per hour less than the other's.

Hence:

First's car's rate = r × 4 = 4r

Second car's distance = (r + 12) × 4 = 4r + 48

4r + 4r + 48 = 760

8r + 48 = 760

8r = 760 - 48

8r = 712

r = 712/8

r = 89 km/hr

The rate of the slower car is 89 km/hr

3 0
2 years ago
Please help :)
slava [35]
For a system of equations such as this, add both of the equations together. The d values will cancel each other out, making 2e=-4. This means that e=-2. If you plug this into one of the equations, you will have d + (-2) = 1. Isolate the variable by adding -2 to both sides: d=3. Written in the format described above (d,e), your answer is (3, -2).
6 0
3 years ago
1. Let’s see how many different routes there are to some of your favorite places. Remember, you always take the shortest path!
OleMash [197]
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7 0
2 years ago
Factor the expression completely over the complex numbers.<br><br> y^4+12y^2+36
Brums [2.3K]
Y⁴ + 12y² + 36
Now factorize the expression
y⁴ + 6y² + 6y² + 36
= y²(y² + 6) + 6(y² + 6)
= (y² + 6) (y² + 6)
<span>Now 6 is not the perfect square and according to rule, binomial can not be factored as the difference of two perfect squares.
</span>so multiply both.
(y² + 6)² is the answer.
7 0
3 years ago
Read 2 more answers
‼️‼️‼️‼️HELP‼️‼️‼️‼️‼️‼️‼️
Vesnalui [34]

Michael took the return trip at a velocity 33.75 miles per hour.

<h3>How fast did Michael drive in his return trip?</h3>

Let suppose that Michael drove in <em>straight line</em> road and at <em>constant</em> velocity. Therefore, the speed of the vehicle (v), in miles per hour, can be defined as distance traveled by the vehicle (d), in miles, divided by travel time (t), in hours.

First trip

45 = s / 3     (1)

Second trip

v = s / 4       (2)

By (1) and (2):

45 · 3 = 4 · v

v = 33.75 mi / h

Michael took the return trip at a velocity 33.75 miles per hour.

To learn more on velocities: brainly.com/question/18084516

#SPJ1

3 0
2 years ago
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