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jonny [76]
3 years ago
15

1/5(2x - 15) + 3/5x =44/5

Mathematics
1 answer:
Anna71 [15]3 years ago
6 0
Solve the rational equation<span> by combining </span>expressions<span> and isolating the </span>variable <span>x</span><span>. I could'nt tell if you wanted me to do It in fractions or divide :/
 I did it in fractons and I got 

</span>x =    \frac{59 \sqrt{3457} \frac{59- \sqrt{x} 3457}{}  }{}<span>
</span>
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In a certain city, the monthly cost of telephone service is given the function C = 0.10n + 18, where n is the number of calls, 1
Yuliya22 [10]

Answer:

The cost of making 60 calls a month is $20.

Step-by-step explanation:

There was a small typing mistake there. If the fixed charge is $14, the cost of n calls is given by the following equation:

C(n) = 0.1n + 14

Find the cost of making 60 calls a month.

This is C(60), that is, C when n = 60. So

C(n) = 0.1n + 14

C(60) = 0.1*60 + 14 = 20

The cost of making 60 calls a month is $20.

5 0
3 years ago
FIND THE AREA OF THIS FIGURE PLEASE HELP!!
Valentin [98]

Answer:17

Step-by-step explanation:

So you start off by multiplying 3×5 beacuse of Area=base×height. And its 15. So you then multiply 2×1 and its 2. You add 15+2=17

8 0
3 years ago
Need help with this one will mark brainliest
Levart [38]

Answer:

Pretty sure it the 1st one

4 0
3 years ago
If y = 5x2 – 3x + k does not hit the x-axis, then what is/are the value(s) of k?
olga2289 [7]

9514 1404 393

Answer:

  k > 9/20

Step-by-step explanation:

If the parabola does not touch the x-axis, the discriminant is negative. That means ...

  b^2 -4ac < 0

  (-3)^2 -4(5)(k) < 0

  9 < 20k . . . . . . . . . add 20k

  k > 9/20 . . . . . . . . .divide by 20

4 0
3 years ago
Read 2 more answers
What is the slant height x of the square pyramid? Enter your answer in the box, express your answer in radical form.
Nadya [2.5K]
<span> For this case we have a rectangle triangle where we know:
 hypotenuse of the triangle.
 Angle between the base of the triangle and the hypotenuse.
 We want to find the height of the triangle.
 For this, we use the following trigonometric relationship:
</span> sine (60) = x / 8&#10;
<span> From here, we clear the value of x.
 We have then:
</span> x = 8 * sine (60)&#10;&#10;x = 6.93 m<span>
 Answer:
 The inclined height of the pyramid is given by:
 x = 6.93 m</span>
3 0
3 years ago
Read 2 more answers
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