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deff fn [24]
3 years ago
9

The number of years a truck is owned, x, and the cost of annual repairs in dollars, f(x) , can be modeled by a linear function.

f(x)=−110.2x+740.8 After how many years would the cost of repairs be $300?
a.3
b.4
c.5
d.6
Mathematics
2 answers:
sdas [7]3 years ago
7 0
Substitute 300 for f(x) and then solve for x.
Dmitry [639]3 years ago
7 0

Answer:

The answer is B

Step-by-step explanation:

300=−110.2x+740.8

x=4

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How would you integrate (2x-1)(6x+5)? is there a product rule for integration?
NikAS [45]
No, there is not a product rule for integration.

To integrate (2x - 1)(6x + 5), start expanding the product:

(2x - 1)(6x + 5) = 12x^2 + 10x - 6x - 5 = 12x^2 + 4x - 5.

Now, I guess you know how to integrate that:

∫ (12x^2 + 4x - 5) dx = ∫12x^2 dx + ∫4x dx + ∫ (-5) dx =  4x^3 + 2x^2 - 5x + C

4 0
3 years ago
A boat traveled 336 miles downstream and back. The trip downstream took 12 hours. The trip upstream took 14 hours. What is the s
Alexeev081 [22]

x - boat speed; y - current speed; Path = 336:2 = 168 miles

1) 12 * (x + y) = 168; -> x + y = 14;

2)  14 * (x - y) = 168; -> x - y = 12;

1) x = 14 - y;

2) (14 - y) - y = 12;

14 - 2y = 12;

2y = 2;

y = 1 mph

x = 14 - 1 = 13 mph

Answer:

Boat speed = 13 mph

Current speed = 1 mph

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Under what circumstances may a health insurer charge a higher premium to a woman with a genetic disposition to breast cancer? a)
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Answer:

D) Health insurers can never discriminate based on genetic information in this way

3 0
2 years ago
8. Solve the following triangle for all missing sides and angles.
vova2212 [387]

Answer:

Parte1 :

∡B= 180 - (42 + 83)= 55°

Parte2 :

Using the law of sines : \frac{sin 42}{a} = \frac{sin 55}{175} ⇔ a = sin42 \frac{175}{sin 55} ⇔ a= 142.95

Parte3 :

Using the same law : c = sin 83\frac{a}{sin 42}  or  c= sin 83\frac{175}{sin 55}  ⇔ c= 212.04

7 0
3 years ago
5x + 2y = 6 3x + y = 4 Which of the following is part of the solution to the system of equations?
BabaBlast [244]
5x + 2y = 6
3x + y = 4....multiply by -2
-------------
5x + 2y = 6
-6x - 2y = -8 (result of multiplying by -2)
-------------add
-x = -2
x = 2

5x + 2y = 6
5(2) + 2y = 6
10 + 2y = 6
2y = 6 - 10
2y = -4
y = -4/2
y = -2 <=== here it is
6 0
3 years ago
Read 2 more answers
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