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choli [55]
4 years ago
14

Find the smallest positive integer which ends in 17, is divisible by 17, and whose digits sum to 17.

Mathematics
1 answer:
Liono4ka [1.6K]4 years ago
8 0
This integer is x17, or xx17, or xxx17
all the digits make a sum of 17, ?+1+7=17, ?=9. the other digits need to make a sum of 9
of the numbers from 1-9, only 1 multiplying 7 will result in a 7 in the one's place, so my reasoning is that the ending 17 needs to remain independent, that is, we need to look for the first digits that will make a sum of 9 AND divisible by 17. Keep counting by 17, 
17, 34, 51, 68, 85, 102, 119, 136, 153
we can see that the first sum of 9 happens when 17*9=153, 1+5+3=9
so the smallest integer that satisfies all the conditions is 15317

Please let me know if you find another way to figure it out, or if there is a smaller interger

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Add. *
Ann [662]

Answer:

31x³-60x²+7x-75

Step-by-step explanation:

(30x³-49x³+7x)+(50x³-60x²-75)

(-19x³+7x)+(50x³-60x²-75)

-19x³+50x³+7x-60x²-75

31x³-60x²+7x-75

3 0
3 years ago
Find the midpoint of the line segment joining the points ​(-1​,​-1) and ​(-3​,​12).
gregori [183]

Answer:

(-2, 11/2)

Step-by-step explanation:

use the mid-point formula!

((x1+x2)/2, (y1+y2)/2)

((-1+-3)/2, (-1+12)/2)

(-2, 11/2)

8 0
4 years ago
Determine the equation of the tangent line to the given path at the specified value of t. (sin(7t), cos(7t), 2t9/2); t=1
Reptile [31]

Answer:

P(t) = {sin7, cos7, 2} + (7cos7, -7sin7, 9)(t-1)

Step-by-step explanation:

The equation of the tangent line to the given path at the specified value of t is expressed as;

P(t) = f(t0) + f'(t0)(t - t0)

f(t0) = (sin(7t), cos(7t), 2t^9/2)

at t0 = 1;

f(t0) = {sin7(1), cos7(1), 2(1)^9/2}

f(t0) = {sin7, cos7, 2}

f'(t0) = (7cos7t, -7sin7t, 9/2{2t^9/2-1}

f'(t0) = (7cos7t, -7sin7t, 9t^7/2}

If t0 = 1

f'(1) = (7cos7(1), -7sin7(1), 9(1)^7/2)

f'(1) =(7cos7, -7sin7, 9)

Substituting the given function into the tangent equation will give:

P(t) = f(t0) + f'(t0)(t - t0)

P(t)= {sin7, cos7, 2} + (7cos7, -7sin7, 9)(t-1)

The final expression gives the equation of the tangent line to the path.

4 0
3 years ago
If 30 marks is 40% what is full marks
Ray Of Light [21]
The full marks is 75.
4 0
3 years ago
Read 2 more answers
Use a graphing utility to approximate (to two decimal places) any relative
iogann1982 [59]

Answer:

Relative minima at (-\frac{7}{2} , -\frac{49}{4} ), and relative maxima DNE.

Step-by-step explanation:

The given function is f(x) = x (x + 7) ...... (1)

We have to calculate the relative maxima and relative minima at point (x, y).

Rearranging the function given above we get.

y= x^{2} +7x = (x + \frac{7}{2} )^{2} -\frac{49}{4}

⇒ y+ \frac{49}{4} = (x + \frac{7}{2} )^{2}

Now, this is an equation of parabola having vertex at (-\frac{7}{2} , -\frac{49}{4} ) and the axis is parallel to positive Y-axis.

Therefore, the function(1) has a relative minima at (-\frac{7}{2} , -\frac{49}{4} ), and the relative maxima DNE. (Answer)

3 0
3 years ago
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